L-ACOUSTICS LA8 4 Channel Digital DSP Acoustics Power Amplifier Owner's Manual
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LA8 OM
LA8 OM - L-Acoustics
The female XLR input connector can receive one digital signal. The input format is AES/EBU (AES3) or electrical S/PDIF. (IEC 60958 Type II). The link connector ...
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LA8
owner's manual (EN)
Document reference: LA8 owner's manual (EN) version 19.1 Distribution date: October 25, 2021 � 2021 L-Acoustics. All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means without the express written consent of the publisher.
Contents
Safety................................................................................................................................................................ 6 Safety instructions..................................................................................................................................... 6
Introduction........................................................................................................................................................ 9 How to use this manual............................................................................................................................ 9 Symbols................................................................................................................................................... 9 LA8 amplied controller...........................................................................................................................10
System components...........................................................................................................................................11
Technical description......................................................................................................................................... 12 Main features......................................................................................................................................... 12 Internal components.......................................................................................................................12 Front and rear panels....................................................................................................................13 Signal processing and amplication......................................................................................................... 14 Signal inputs.................................................................................................................................14 DSP architecture............................................................................................................................14 Power supply and amplier section.................................................................................................15 Speaker outputs............................................................................................................................ 16 Monitoring and control............................................................................................................................16 User interface............................................................................................................................... 16 L-NET remote control network......................................................................................................... 16
Inspection and preventive maintenance............................................................................................................... 17 How to do preventive maintenance.......................................................................................................... 17 External structure.....................................................................................................................................18 Cleanness...............................................................................................................................................19 Normal start-up sequence........................................................................................................................ 19 Network functionalities and rmware........................................................................................................ 19
Installation........................................................................................................................................................ 20 Mounting................................................................................................................................................20 Ventilation.............................................................................................................................................. 21 Connecting to AC mains......................................................................................................................... 21 Electrical specications.................................................................................................................. 21 Planning the power of the electrical generator................................................................................. 22 Power cord...................................................................................................................................22 Power consumption........................................................................................................................22 Heat power calculation..................................................................................................................23 Audio and network cabling..................................................................................................................... 23
3
Connection panels.........................................................................................................................23 Analog audio............................................................................................................................... 26 Digital audio................................................................................................................................ 27 L-NET........................................................................................................................................... 28 Speaker........................................................................................................................................28
Operation........................................................................................................................................................ 29 Powering on...........................................................................................................................................29 Powering off...........................................................................................................................................29 Setting to standby mode..........................................................................................................................29 Interpreting the front panel LEDs...............................................................................................................30 L-NET........................................................................................................................................... 30 Meters.......................................................................................................................................... 30 OUT.............................................................................................................................................30 Main screen description.......................................................................................................................... 31 Using quick access functions.................................................................................................................... 32 Locking/Unlocking the front panel.................................................................................................. 32 Muting/Unmuting an output channel............................................................................................... 32 Modifying gain............................................................................................................................. 33 Identifying an amplied controller................................................................................................... 33 Displaying input level, input selection, input mode and group information........................................... 34 Using the main menu.............................................................................................................................. 35 LOAD PST.................................................................................................................................... 36 STORE PRESET.............................................................................................................................. 38 DELETE PRESET............................................................................................................................. 39 PRESET PARAMETERS.................................................................................................................... 39 CLEAR GRP PARAMS.....................................................................................................................41 INPUT SETTINGS.......................................................................................................................... 42 MONITORING & INFO................................................................................................................. 46 OPTIONS..................................................................................................................................... 47 IP SETTINGS.................................................................................................................................50 Settings protection...................................................................................................................................54
Corrective maintenance..................................................................................................................................... 56 Introduction.............................................................................................................................................56 Presentation.................................................................................................................................. 56 Troubleshooting and diagnosis................................................................................................................. 57 Interface issues..............................................................................................................................57 L-NET network issues..................................................................................................................... 58 Error messages............................................................................................................................. 58 Sound issues.................................................................................................................................61 Exploded view........................................................................................................................................63
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External modules........................................................................................................................... 63 Disassembly and Reassembly procedures.................................................................................................. 64
D/R - Front frame......................................................................................................................... 64 D/R - Foam lter...........................................................................................................................65 D/R - Rear bracket........................................................................................................................66 Specications................................................................................................................................................... 67 General................................................................................................................................................. 67 Input signal distribution............................................................................................................................68 Analog input.......................................................................................................................................... 69 Digital input........................................................................................................................................... 69 Latency...................................................................................................................................................69 Physical data..........................................................................................................................................70 Appendix A - Glossary..................................................................................................................................... 71 Appendix B - Approvals.................................................................................................................................... 72
5
Safety
Safety
Safety instructions
1. Read this manual 2. Follow all SAFETY INSTRUCTIONS as well as DANGER and OBLIGATION warnings 3. Never incorporate equipment or accessories not approved by L-Acoustics 4. Read all the related PRODUCT INFORMATION documents before exploiting the system
The product information document is included in the shipping carton of the related system component. 5. Environments
Use the product only in E1, E2, E3, or E4 environments according to EN55103-2 standard. 6. Radio interference
A sample of this product has been tested and complies with the limits for the EMC (Electro Magnetic Compatibility) directive. These limits are designed to provide reasonable protection against harmful interference from electrical equipment. However, there is no guarantee that interference will not occur in a particular installation. 7. Power cord caution Do not use the product if the power cord is broken or frayed. Protect the power cord from being walked upon or pinched - particularly at the plugs and the point where the power cord exits from the apparatus. 8. Mains supply Only connect the LA8 (CE model), LA8US (US model), or LA8CN (China model) to an AC power outlet rated 230 V, 16 A, 50-60 Hz or 120 V, 30 A, 50-60 Hz. Only connect the LA8JP (Japan model) to an AC power outlet rated 100 V, 30 A, 50 - 60 Hz or 200 V, 15 A, 50-60 Hz. 9. Three-phase circuit Verify that each phase works, in particular the neutral one. Balance the loads between the three phases. Never try to reproduce a 230 V circuit connecting an LA8, an LA8US, or an LA8CN to two live wires of a 120 V three-phase circuit. Never try to reproduce a 200 V circuit connecting an LA8JP to two live wires of a 100 V three-phase circuit. 10. Electrical generator You must power on the generator before powering on the amplied controllers Verify that the amplied controllers are turned off before powering on the generator. 11. Circuit breaker Always interconnect a circuit breaker between the product and the mains. Use these references, or equipment with equivalent characteristics: 100-120 V: 30 A, Schneider Electric Square D 30A QO (in North America), or Mitsubishi CP30-BA-M (in Japan) 200-240 V: 15 A (LA8JP) / 16 A (LA8/LA8US/LA8CN), Class C
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LA8 owner's manual (EN) version 19.1
Safety
12. Grounding To plug the controller to mains only use an outlet tted with a pin tied to ground. Do not defeat the ground pin of the outlet as it connects the controller to earth. If the local outlet is obsolete, consult an electrician. The product is tted with a grounding-type plug. Do not defeat the ground wire connecting the plug's female contact to the product's chassis.
13. Plug replacement If the AC plug on the power supply cord of this product does not match the local outlet, it must be replaced by an appropriate one. This operation should only be performed by qualied service personnel. Verify that the cut-off plug is withdrawn from use, as it can cause severe electrical shock if connected to an AC outlet.
14. Lightning storm During lightning storms, disconnect the product from the mains. Switching the product off does not disconnect it from the mains. To do this, remove the plug from the mains outlet.
15. Interconnections When connecting the product to other equipment, mute all output channels. Carefully read the user manual of the other equipment and follow the instructions when making the connections. Do not connect a speaker output in parallel or series with any other amplier output. Do not connect the speaker outputs to any other voltage source, such as a battery, mains source, or power supply, regardless of whether the product is turned on or off.
16. Over power risks The product is very powerful and can be potentially dangerous to both loudspeakers and humans alike. Even reducing the gain it is still possible to reach very high output power if the input signal level is high enough.
17. Operating temperature The product operates at a room temperature between 0 �C and +50 �C.
18. Ventilation Openings in the product chassis are for ventilation. They prevent the product from overheating and thus ensure reliable operation. These openings must not be blocked or covered. The product must be installed in accordance with the instructions given in this manual.
19. Heat Do not operate the product near any heat source, such as radiators or other devices.
20. Water and moisture To prevent re or shock hazard, do not expose the product to rain or moisture. Do not use the product near water. Do not operate the product while wet.
21. Interference with external objects and/or liquids Never push objects of any kind into the product through openings as they may touch dangerous voltage points or short out parts that could result in a re or electric shock. Never spill liquid of any kind on the product.
22. Cleaning Unplug the product from the mains before cleaning. Do not use liquid or aerosol cleaners. Clean only with dry cloth.
LA8 owner's manual (EN) version 19.1
7
Safety
23. Mounting instructions
Do not place the product on an unstable cart, stand, tripod, bracket, or table. The product may fall and be seriously damaged, and may cause serious human injury.
Any mounting of the product should follow the manufacturer's instructions given in this manual, and should use accessories recommended by the manufacturer.
24. Conditions which require immediate service
Refer all servicing to qualied service personnel.
Servicing is required when the product has been damaged in any way such as:
� Power supply cord or plug is damaged, � Liquid has been spilled or an object has fallen into the product, � The product has been exposed to rain or moisture, � The product was dropped or the housing is damaged, � The product does not operate normally.
25. Servicing and replacement parts
Do not attempt to service this product as removing covers may expose to dangerous voltage or other hazards.
The use of unauthorized replacement parts may result in injury and/or damage through re, electric shock, or other electricity-related hazards.
All service and repair work must be carried out by an L-Acoustics authorized dealer.
26. Shipping
Use the original packaging for shipping the product, unless it is mounted in a rack with the front and rear panels xed to the rack, as described in this manual.
Symbols indicated on the product
CAUTION
RISK OF ELECTRIC SHOCK DO NOT OPEN
The product is potentially life threatening if open. Never attempt to remove the back cover.
The lightning ash symbols next to the speakON� and CA-COM connectors indicate that the product can generate high output voltages that are potentially life threatening.
Always use ready-made leads to connect the product to speakers.
Never touch any exposed speaker wires while the product is operating without rst disconnecting the wires from the product.
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LA8 owner's manual (EN) version 19.1
Introduction
Introduction
How to use this manual
The LA8 owner's manual is intended for all actors involved in the system design, implementation, preventive and corrective maintenance of the LA8 product. It must be used as follows: 1. Read the technical description for an overview of all product elements, their features, and their compatibilities.
� Technical description (p.12) 2. Before installing the product, perform mandatory inspections and functional checks.
� Inspection and preventive maintenance (p.17) 3. To deploy the product, follow the step-by-step installation instructions and refer to the cabling schemes.
� Installation (p.20) � Audio and network cabling (p.23) 4. To congure the settings and parameters of the product, follow the step-by-step operation instructions. � Operation (p.29)
The Corrective maintenance (p.56) section contains the operations authorized for the end user. Performing another operation exposes to hazardous situations. For advanced maintenance, contact your L-Acoustics representative. As part of a continuous evolution of techniques and standards, L-Acoustics reserves the right to change the specications of its products and the content of its documents without prior notice. Check www.l-acoustics.com on a regular basis to download the latest document and software updates.
Contact information
For information on advanced corrective maintenance: � contact your Certied Provider or your L-Acoustics representative � for Certied Providers, contact the L-Acoustics customer service: customer.service@l-acoustics.com
Symbols
The following symbols are used in this document: This symbol indicates a potential risk of harm to an individual or damage to the product. It can also notify the user about instructions that must be strictly followed to ensure safe installation or operation of the product. This symbol indicates a potential risk of electrical injury. It can also notify the user about instructions that must be strictly followed to ensure safe installation or operation of the product. This symbol noties the user about instructions that must be strictly followed to ensure proper installation or operation of the product.
This symbol noties the user about complementary information or optional instructions.
Do not open unless authorized. This symbol indicates the presence of electrical shock hazards. It also indicates that no maintenance performed by the end user requires access to internal components.
LA8 owner's manual (EN) version 19.1
9
Introduction
LA8 amplied controller
At the heart of the L-Acoustics integrated system approach, the LA8 amplied controllers offer cutting edge loudspeaker amplication, DSP, network control, and comprehensive system protection in a single ergonomic package. Based on similar platforms, the exceptional and ground-breaking performance level delivered by the LA8 units allow full optimization of the resources of all L-Acoustics systems and deliver outstanding audio quality combined with the best possible transducer protection. The unique ensemble of on-board features and the addition of peripherals are all offered in a secured and standardized environment. This approach simplies system setting and operation with the benet of superior and predictable audio results across the entire product range. Driving four amplied output channels through a DSP offers a wide range of options when it comes to sound system conguration. The LA8 on-board preset libraries allow the sound engineer a high degree of exibility in choosing the enclosure models and the system conguration for a specied application.
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LA8 owner's manual (EN) version 19.1
System components
System components
Powering and driving system
LA8
Amplied controller with DSP, preset library and networking capabilities
Loudspeaker enclosures
Refer to the user documentation of the loudspeaker systems for detailed instructions about the enclosures and their connection to the amplied controllers.
Rack
LA-RAK
Touring rack containing three LA8 and power, audio and network distribution
Transportation accessories
L-Case
2U Electronics transport and protection case
Software applications
Soundvision
3D acoustical and mechanical modeling software
LA Network Manager Software for remote control and monitoring of amplied controllers
Refer to the Soundvision help. Refer to the LA Network Manager help.
System component illustrations
Software applications
Soundvision
LA Network Manager
LA8 owner's manual (EN) version 19.1
11
Technical description
Technical description
Main features
Internal components
The core of the LA8 is a DSP engine driving four channels of amplication from two inputs. The LA8 also features a ash memory for preset storage and management, high performance A/D-D/A converters and AES/EBU inputs for audio signals, an auto-sensing SMPS (Switched Mode Power Supply), a front panel user interface, and a fast Ethernet device for networked remote control. LA8 simplied block diagram
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LA8 owner's manual (EN) version 19.1
Front and rear panels
1 23
4
011:K1
100
LF_A LF_A MF_A HF_A
6
7
8
5 12
Technical description
9
10
15 11
1 LED meters: -- CLIP level -- audio levels (-5 dB, -10 dB and -25 dB) -- SIGNAL presence -- LOAD presence
2 L-NET network control LED 3 2 x 20 characters LCD display 4 navigation/edition encoder wheel 5 power switch 6 channel selection keys 7 menu keys 8 inward ventilation grill and foam lter
13
14
9 A/C power cord 10 outward ventilation grills 11 speakON output connectors 12 XLR analog input/link connectors 13 XLR AES/EBU input/link connectors 14 etherCON L-NET network connectors 15 8-point output connector
LA8 owner's manual (EN) version 19.1
13
Technical description
Signal processing and amplication
Signal inputs
AES/EBU
LA8 can be fed with one AES/EBU digital audio signal carrying two audio channels using XLR input connectors AES/ EBU IN A&B, thanks to the LA-AES3 card. The card features an XLR input port, an active XLR link port, and a Sample Rate Converter (SRC) -- see illustration in section Front and rear panels (p.13). The AES/EBU input port is an XLR female connector. The audio signals can come from a digital mixing desk or a digital audio network bridge compliant with the AES/EBU (AES3) or electrical S/PDIF (IEC 60958 Type II) digital audio standards. The AES/EBU input port is ESD protected and transformer balanced. The AES/EBU link port is an XLR male connector transmitting the input signal to daisy-chained amplied controllers. It is ESD protected and transformer balanced. The SRC embedded in the LA-AES3 board has been selected to support a wide range of input formats (16 - 24 bits / 44.1 - 192 kHz). It converts any of them to the 24 bits/96 kHz internal format used by the amplied controller. The SRC is a high-quality hardware component (140 dB dynamic range, THD+N < -120 dBFS, strong input jitter attenuation) and provides constant propagation delay regardless of the input sampling frequency. There is no external synchronization mode. The amplied controller's clock always runs using its high-precision internal quartz at 96 kHz. This ensures low jitter and high audio quality while preventing phase shift, as required for line source systems.
Digital domain benets
Keeping the signal in the digital domain provides the following benets (with any digital mixing desk or any audio device) compared to the analog signal distribution:
� Better audio quality by removing one D/A - A/D cycle. � Optimized level chain by removing the risk of level misalignment between console and amplied controllers. � Digital signal refreshed at each amplied controller in a daisy-chain. � Improved maximum cable length. LA8 has been tested with up to 300 m / 984 ft of two models of AES/EBU rated
cables (single cuts, digital source signal running at Fs = 48 kHz): � 1696A from BELDEN INC. � OT234H from KLOTZ communications GmbH.
Analog
LA8 can be fed with two balanced analog audio signals using the appropriate XLR input ports -- see illustration in section Front and rear panels (p.13). Each analog input port is ESD protected and equipped with one XLR female connector. The analog input panel also features two XLR male link connectors passively wired to the input connectors. They allow transmitting the input signals to daisy-chained amplied controllers. Each analog link port is ESD protected and equipped with one XLR male connector. To be processed by the DSP, the analog signal must be converted into a digital signal. For this purpose, the LA8 amplied controller is tted with two cascaded 24-bit A/D converters with a sampling rate of 96 kHz allowing an encoding dynamic range of 130 dB.
DSP architecture
The proprietary algorithms allow optimum performance and protection of each individual transducer of the L-Acoustics systems for an even more natural, transparent, and realistic sound experience.
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LA8 owner's manual (EN) version 19.1
Technical description
� The DSP engine is a 32-bit oating point DSP at 96 kHz sampling rate providing an enhanced dynamic range since it does not generate calculation clips like a xed point DSP.
� A dedicated engineering approach combining IIR and FIR lters generates perfectly linearized phase curves and signicantly improved impulse responses.
� The 2 � 4 matrix architecture offers exibility for various system congurations. � A delay of up to 680 ms can be set for each output channel. � The L-DRIVE transducer protection system offers advanced protection by simultaneously monitoring the excursion and
the temperature of the transducer. � With a complete factory preset library and the possibility to create additional user presets, the ash memory
provides a quick access to all the usual L-Acoustics speaker system congurations (refer to the Preset Guide).
audio path parameters
IN A IN B
2 x 4 matrix
GAIN DEL POL Array Morphing + multi band EQ GAIN DEL POL Array Morphing + multi band EQ GAIN DEL POL Array Morphing + multi band EQ GAIN DEL POL Array Morphing + multi band EQ
can be set from LA Network Manager only can be set from LA Network Manager and the Amplified Controller interface locked can be managed by groups
L-Acoustics parameters
IIR filters - Bessel, BTW, LR
FIR filters - zero phase shift
over excursion protection
thermal protection
Power supply and amplier section
The LA8 amplier section uses a Class D technology supporting the very wide dynamic range found in live audio productions. The 4 channels can deliver up to 4 x 1800 watt into 4 or 2.7 ohm yielding perfect power matching to each individual L-Acoustics loudspeaker system.
The auto-sensing SMPS (Switched Mode Power Supply) offers better stability by associating two symmetrical power supplies.
LA8 owner's manual (EN) version 19.1
15
Technical description
Speaker outputs
LA8 features two 4-point speakON connectors and one 8-point connector for loudspeaker outputs.
Monitoring and control
User interface
The front panel user interface provides: � Real-time monitoring functionalities via the LED display (signals presence and level) and the LCD screen (system parameters). � Instant access to navigation and parameters control using the encoder wheel and the six keys.
See also illustration in section Front and rear panels (p.13).
Refer to section Operation (p.29) for detailed operating instructions.
L-NET remote control network
The integration of the L-NET Ethernet-based network, with its high speed data transfer protocol of 100 Mbit/s, allows up to 253 amplied controllers to be controlled and monitored in real-time from LA Network Manager. Multiple network topologies such as daisy-chain, star and hybrid are congurable. The computer running LA Network Manager and the amplied controllers are connected to each other using industry standard CAT5e U/FTP cables (or higher category) tted with RJ45 connectors. The LA8 connects to the network via the two I/O Ethernet sockets located on its rear panel.
Refer to the LA Network Manager Help for detailed operating instructions.
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LA8 owner's manual (EN) version 19.1
Inspection and preventive maintenance
Inspection and preventive maintenance
How to do preventive maintenance
Inspect the product periodically as indicated, and after any corrective maintenance operation. Structure and cleanness Before and after each deployment (touring applications), or at least once a month (xed installations):
� External structure (p.18) � Cleanness (p.19) Functionalities At least once a year: � Normal start-up sequence (p.19) � Network functionalities and rmware (p.19)
LA8 owner's manual (EN) version 19.1
17
Inspection and preventive maintenance
External structure
The indicates a visual inspection.
rear brackets are present and not damaged
encoder wheel, and grill and foam lter are present and not damaged
see also Cleanness (p.19)
chassis, LCD screen, and LEDs are not damaged
connectors and power cable are not damaged
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LA8 owner's manual (EN) version 19.1
Inspection and preventive maintenance
Cleanness
Equipment � air blower
Procedure 1. Disassemble the grill to clean the foam lter.
Refer to the Front frame (p.64) procedure. 2. Clean the amplied controller through the front grill with an air blower. 3. Reassemble the foam lter and the grill.
Normal start-up sequence
Procedure 1. Plug the amplied controller to mains. 2. Power on the amplied controller. 3. Check that the LCD screen and all the LEDs light up during the start-up sequence.
Network functionalities and rmware
Equipment � computer with LA Network Manager � CAT5e U/FTP cable
Procedure 1. Connect the Ethernet port 1 of the amplied controller to an Ethernet port of a computer running LA Network
Manager. Use the CAT5e U/FTP cable. 2. Run LA Network Manager. 3. Check that the amplied controllers are detected as online Units. Refer to the LA Network Manager Help. 4. Check that all LA8 in the system run the same version of the rmware, and that it matches with the version of LA Network Manager in use. Refer to the LA NWM and Firmware Compatibility Issues technical bulletin. 5. If convenient, update LA Network Manager and the rmware to the latest versions.
If using a third-party control system such as Crestron or Extron, check that updating rmware does not break compatibility.
LA8 owner's manual (EN) version 19.1
19
88 mm / 3.5 in
Installation
Installation
Mounting
The LA8 is two rack units high (2U) and can be mounted in an EIA-standard 19" rack using the four points on the front panel. Use the xing material provided by the rack manufacturer to mount the controller to the rack front rails.
LA8 dimensions 483 mm / 19 in
406 mm / 16 in
465 mm / 18.3 in
76 mm / 3 in
433 mm / 17 in
420 mm / 16.5 in 7.6 mm / 0.3 in
Risk of damaging the amplied controller during transport During transport or while on tour the amplied controller should be rear supported in addition to the front panel mounting. Use the rear brackets provided with the amplied controller. Any mechanical damage to the amplied controller used in portable applications without rear support is not covered by warranty.
LA8 with rear rack support brackets
390 mm / 15.4 in
Max 486 mm / 19.1 in.
400 mm / 15.17 in.
The LA-RAK touring rack is available for three LA8 with all power and signal connection facilities. Refer to the LA-RAK user manual.
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LA8 owner's manual (EN) version 19.1
Installation
Ventilation
To maintain moderate operating temperatures, the LA8 is equipped with fans and grills providing front to rear airow.
Ventilation instructions Ensure the front foam lter is clean and dirt free. Do not block the front and rear ventilation grills.
Ventilation when rack-mounted Do not block the ventilation grills with front or back panels or doors. If not possible, use a forced-ventilation system. When stacking more than one controller in a rack, mount them directly on top of each other or close any open space in the rack with blank panels.
Connecting to AC mains
Electrical specications
AC mains specications
Only connect the LA8 (CE model), LA8US (US model), or LA8CN (China model) to an AC power outlet rated 230 V, 16 A, 50-60 Hz or 120 V, 30 A, 50-60 Hz.
Only connect the LA8JP (Japan model) to an AC power outlet rated 100 V, 30 A, 50 - 60 Hz or 200 V, 15 A, 50-60 Hz.
To plug the controller to mains only use an outlet tted with a pin tied to ground.
Do not defeat the ground pin of the outlet as it connects the controller to earth. If the local outlet is obsolete, consult an electrician.
The following table gives the LA8 power data in nominal use (4 , 1/8 of maximum output power. Refer to section Power consumption (p.22)).
voltage (V) *
frequency (Hz)
current (A)
power consumption (W)
120 / 230 (LA8, LA8US, LA8CN)
50 - 60
21 / 11
1500
100 / 200 (LA8JP)
50 - 60
25 / 13
1500
* If the mains voltage value increases up to more than 142 V, the amplied controller automatically switches to the 230 or 200 V mode.
If the mains voltage value decreases down to less than 132 V, the amplied controller automatically switches to the 120 or 100 V mode.
Three-phase circuit
When the product is used in a three-phase circuit, verify the electrical conformity and compatibility of the three-phase circuit. Verify that the three phases work, and balance the loads between the three phases. Verify that the neutral and earth work. Never try to emulate a 230 V circuit connecting an apparatus to two live wires of a 120 V three-phase circuit. Never try to emulate a 200 V circuit connecting an apparatus to two live wires of a 100 V three-phase circuit.
Circuit breaker
Always interconnect a circuit breaker between the product and the mains. Use these references, or equipment with equivalent characteristics: 100-120 V: 30 A, Schneider Electric Square D 30A QO (in North America), or Mitsubishi CP30-BA-M (in Japan) 200-240 V: 15 A (LA8JP) / 16 A (LA8/LA8US/LA8CN), Class C
LA8 owner's manual (EN) version 19.1
21
Installation
Planning the power of the electrical generator
Electrical generator You must power on the generator before powering on the product. LA8 draws 16 A from 230 V. A typical generator has a power factor of 0.8 and should operate at 70% load for good efciency. The kVA provision for one LA8 should therefore be: (16 A � 230 V) / (0.8 � 70%) = 6.5 kVA This calculation is an example using typical values. It can be adapted using the table in section Power consumption (p.22).
Power cord
The power cord plug and the wires color code depends on the cord type, as follows:
type
plug
live
neutral
CE
CEE 7/7, 16 A / 250 V, grounded
brown
blue
JP
as selected by the distributor
CN
GB1002 GB2099
brown
US
NEMA L5-30P, 30 A / 125 V, grounded black
blue white
ground
green/yellow green green
Strictly apply the specic safety regulations of the country of use.
Do not defeat the ground connection of the supplied power cord using an adaptor or any other methods.
If the power plug does not match the local power outlet, cut it off and wire a suitable plug.
Verify that the plug conforms to the specic voltage and current rating given in section Electrical specications (p.21).
A new xed power panel with larger gauge wiring is quite often required to connect the LA8US so as to meet the 30 A specication.
Power consumption
The LA8 power requirements depend on the load impedance and the signal level. Mains input power and current draw (all channels driven)
Maximum output power 1/3 output power (-5dB) 1/8 output power (-9 dB) Idle Standby
4 � 1800 W at 4 22 A / 3100 W 11 A / 1500 W
4 � 1100 W at 8 15 A / 1950 W 10 A / 1300 W 0.5 A / 115 W < 0.1 A / 12 W
Current values given for mains rated at 230 V. Multiply by: � 2.3 for 100 V � 2 for 120 V � 1.15 for 200 V
If the voltage exceeds a � 10% range, the maximum power is no longer guaranteed.
Output power references A third (1/3) of the maximum output power corresponds to the worst case scenario of a program source using highly compressed music or pink noise with amplied controller driven to clip level. An eighth (1/8) of the maximum output power corresponds to a loud music program with a small dynamic range and 9 dB of headroom (IEC standard power rating).
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LA8 owner's manual (EN) version 19.1
Installation
Heat power calculation
If a 4 load is connected to each output channel of the LA8, each channel delivers up to 1800 W. With a standard use at 1/8 of full power (9 dB headroom), the power delivered per channel is: 1800 / 8 = 225 W, so a total power of 4 x 225 = 900 W. According to the table in section Power consumption (p.22), the LA8 power consumption is 1500 W. The heat power produced is then (difference between power consumption and output power): 1500 - 900 = 600 W
Audio and network cabling
Connection panels
The amplied controller's rear side features three panels for audio and network cabling: � A speaker panel (1) to connect the loudspeakers. � A signal panel (2) to connect the analog and digital (AES/EBU or S/PDIF) audio sources, and link the signals to another amplied controller. � An L-NET panel (3) to connect to a network and be remotely controlled by LA Network Manager.
LA8 audio and network connection panels
1
Speaker panel
2
3
The two 4-point speakON connectors and the 8-point connector on the rear panel are for loudspeaker connection. They are wired as follows:
left speakON connector
Pin 1+
Out 1+
Pin 1 -
Out 1 -
Pin 2+
Out 2+
Pin 2 -
Out 2 -
right speakON connector
Pin 1+
Out 3+
Pin 1 -
Out 3 -
Pin 2+
Out 4+
Pin 2 -
Out 4 -
Pin A Pin B Pin C Pin D
8-point output connector
Out 1+
Pin E
Out 1 -
Pin F
Out 2+
Pin G
Out 2 -
Pin H
Out 3+ Out 3 Out 4+ Out 4 -
LA8 owner's manual (EN) version 19.1
23
Installation
output audio paths
DSP
OUT 1
OUT 2
OUT 3
OUT 4
1+ 1- 2+ 2-
1+ 1- 2+ 2-
A
G F
BH
E CD
Signal panels The six XLR connectors on the rear panel are for analog or digital signal cabling. Two IN and two LINK connectors are for analog signals, and one IN and one LINK connectors are for AES/EBU signals.
LINK A
IN A
LINK B
IN B
AES/EBU IN & LINK
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LA8 owner's manual (EN) version 19.1
Analog input mode
The XLR connectors are wired according to IEC 60268-12: � pin 1: shield � pin 2: + signal � pin 3: - signal
Input A
-+
z
Input B
-+
Installation
3 21
3 12
3 21
3 12
LINK A IN A
LINK B IN B
The female XLR input connectors IN A and IN B can receive two analog signals. The headroom of the input circuits is high enough to accept the maximum output level from virtually any line level signal source (up to 22 dBu).
Each LINK connector is passively wired in parallel to the corresponding IN channel. The input impedance is high enough (22 k, balanced) to allow multiple parallel input connections.
AES/EBU input mode
Digital audio source specications Standard: AES/EBU (AES3) or electrical S/PDIF (IEC 60958 Type II) Sampling frequency: 44.1, 48, 64, 88.2, 96, 128, 176.4 or 192 kHz Word length: 16, 18, 20 or 24 bits
The AES/EBU inputs are transformer balanced and their XLR connectors are wired according to IEC 60268-12.
IN
LINK
21 3
12 3
z
AES/EBU Rx & SRC
The female XLR input connector can receive one digital signal. The input format is AES/EBU (AES3) or electrical S/PDIF (IEC 60958 Type II).
The link connector is electronically buffered to allow daisy-chaining any number of amplied controllers. It also features a failsafe relay to ensure wiring continuity in case of amplied controller shutdown.
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25
Installation
L-NET panel Use the two RJ45 I/O connectors for the remote control of LA8 over an Ethernet network called L-NET using LA Network Manager.
Analog audio
Balanced cables Symmetrical (balanced) shielded cables are highly recommended as balanced signals are less sensitive to AC hum and radio interference. Unbalanced lines may add noise especially over long cable runs. In a daisy-chain layout, the male XLR link connectors LINK A and LINK B feed the input signals to the next amplied controller in the signal chain.
daisy-chaining analog audio
IN A
IN B
LINK A
LINK B
Analog daisy-chain and LA4/LA8 with power off or in standby
In an analog daisy-chain, LA4 and LA8 with power off or in standby cause sound distortion at high input levels to the other amplied controllers they are connected to.
Make sure all LA4 and LA8 are powered on and in operating (not in standby) mode, or disconnect them from the daisy-chain.
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LA8 owner's manual (EN) version 19.1
Installation
Digital audio
In a daisy-chain layout, the male XLR link connector feed the input signals to the next amplied controller in the signal chain. daisy-chaining digital audio
AES/EBU IN
AES/EBU LINK
Cables for AES/EBU digital audio AES3 species that the nominal characteristic impedance of cables used for AES/EBU digital audio transmission shall be 110 � 20%, and closer tolerances allow for increased transmission reliability over long lengths or higher sampling rates. Therefore, it is highly recommended to use high-quality AES/EBU rated cables only, although certain cables designed for balanced analog audio prove to be acceptable at 48 kHz sampling rate over very short distances. It is recommended to use single lengths of cable between AES/EBU outputs and inputs. Using several shorter cables joined together reduces performance. If it is not possible to use single lengths, it is required to use the same model of cable between two AES/EBU interfaces. In case an amplied controller shuts down, the failsafe relay makes a passive connection between the AES/EBU IN port and the LINK port to maintain continuity. However the signals are no longer refreshed for the next amplied controller, so that the input cable and the link cable must be considered as a unique input cable with regard to the maximum supported length. In case of transmission losses, try to reduce the sampling frequency of the digital audio source. Moreover, as a general rule, avoid using sources rated beyond 96 kHz, as the maximum possible cable length is reduced, while the additional information is cancelled by SRC to 96 kHz.
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27
Installation
L-NET
Do not create loops in the network setup.
Always place LA2Xi, LA4X, and LA12X amplied controllers before LA4/LA8 amplied controllers in daisy-chain networks. LA4 and LA8 amplied controllers are equipped with former generation 100 Mb/s Ethernet ports that cannot communicate with Ethernet ports of different capabilities, creating detection issues in LA Network Manager. L-NET cables specications Connect the computer and the amplied controllers to the L-NET network using straight-through Ethernet cables of CAT5e U/FTP category (or higher) and of 100 m / 328 ft maximum length. Exception: If the Auto MDI/MDIX feature is not available on a switch used to build a star or hybrid topology, use a crossover cable between the switch and each controller. Network and cable specications The L-NET network is rated at 100 Mbits/s. A straight-through cable has pin 1 of one side connected to pin 1 of the other side, pin 2 to pin 2, etc. A crossover cable has pin pairs 1-2 and 3-6 crossed. The type of a cable can be directly identied comparing the wire colors between its two RJ45 connectors. CAT5e U/FTP stands for a category 5, unshielded cable with foiled twisted pairs. Using lower category cables or CAT5e "patch" cables will result in connection issues. The maximum length for a typical CAT5e U/FTP cable is 100 m / 328 ft. This value is indicative and can vary depending on the quality of the cable. Use the etherCON connectors on the rear panel to connect LA8 to L-NET in a daisy-chain, star, or hybrid topology. Refer to the LA Network Manager Help for network setup.
Speaker
There is a risk of damaging the speakers The DO2W, DOFILL and DOSUB PA-COM cables are not compatible with the LA8. All other L-Acoustics PA-COM cables can be used. Refer to the LA8 PACOM CABLES technical bulletin for more details. Use the speakON or the 8-point output connectors to connect an enclosure to the amplied controller. For cabling schemes, refer to the Amplication reference technical bulletin. For the enclosure drive capacity per amplied controller, refer to the Amplication reference technical bulletin or the Preset guide.
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LA8 owner's manual (EN) version 19.1
Operation
Operation
Powering on
Press the power switch up. The amplied controller goes through a 9 seconds start-up sequence displaying Initializing Controller. All LEDs lit for test.
CLIP -5dB -10dB -25dB SIGNAL LOAD
L-NET
8
Initializing Controller
MENU
ESC
OK
OUT 1
OUT 2
OUT 3
OUT 4
IN A
IN B
The amplied controller is ready for use when the main screen is displayed. Refer to section Main screen description (p.31).
Powering off
Press the power switch down. The amplied controller goes through a shutdown sequence displaying Waiting SMPS and lighting the four LOAD LED.
CLIP -5dB -10dB -25dB SIGNAL LOAD
L-NET
8
System Message MENU Waiting SMPS
ESC
OK
OUT 1
OUT 2
OUT 3
OUT 4
IN A
IN B
Powering off the amplied controller does not disconnect it from mains.
Power loss If power is lost, the amplied controller shuts down, but all parameters are restored when the amplied controller switches on again.
Setting to standby mode
To reduce the electrical consumption, the amplied controller can be put in standby mode. Use LA Network Manager to set the amplied controller to standby or back to operating mode. Refer to the LA Network Manager Help. An amplied controller in standby mode displays Standby mode. Standby mode can also be cancelled from the amplied controller front panel by pushing and holding the encoder wheel for one second.
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29
Operation
Interpreting the front panel LEDs L-NET
The L-NET LED on the front panel displays the L-NET status.
CLIP -5dB -10dB -25dB SIGNAL LOAD
L-NET
� green: when LA8 is remotely controlled by software such as LA Network Manager (refer to the LA Network Manager Help).
� off: when no software remotely controls the amplied controller. The front panel commands remain accessible when the L-NET LED is lit.
Meters
The four LED meters (six LEDs each) display the state of the corresponding output channel.
CLIP -5dB -10dB -25dB SIGNAL LOAD
L-NET
CLIP red: the output voltage reaches the maximum level (signal clip) -5dB -10dB green: the output voltage reaches 5, 10 or 25 dB below the maximum level -25dB SIGNAL green: a signal is detected and the output voltage reaches 0.1 V LOAD green: a load is connected and the output module delivers a minimum of 0.8 A
OUT
The four OUT LEDs on the front panel display the mute status.
OUT 1
OUT 2
OUT 3
OUT 4
� blue: when the corresponding output channel is muted � off: when the corresponding output channel is unmuted
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LA8 owner's manual (EN) version 19.1
Operation
Main screen description
The amplied controller displays the main screen at the end of the startup sequence.
12 3
45
001:X15HiQ_MO 110* PA_A PA_A PA_B PA_B
6
1. low latency symbol: indicates loaded preset is a low latency preset (refer to the LA Network Manager help) 2. preset memory number (001 to 255): memory space containing the current preset. The preset can be a user
preset or come from the on-board preset library -- refer to section LOAD PST (p.36) 3. preset name: as in the on-board preset library or as entered by the user (if stored in a user preset) 4. last number of the IP address (1 to 254): identies the controller within the L-NET network -- refer to section
ADDRESS (p.51) 5. star sign: indicates unsaved changes in the preset parameters -- refer to section STORE PRESET (p.38) 6. output name and input selection: placed above the corresponding output key, written in the xx_y form,
where: � xx indicates the type of transducer section or enclosure to be connected to the output channel:
LF: low frequency transducer section, part of a 2 or 3-way loudspeaker enclosure MF: mid frequency transducer section, part of a 3-way loudspeaker enclosure HF: high frequency transducer section, part of a 2 or 3-way loudspeaker enclosure PA: passive loudspeaker enclosure SB: subwoofer enclosure with the front face towards the audience SR: subwoofer enclosure with the front face in the opposite direction from the audience (in a cardioid conguration) � y indicates the input selection of the output channel (input channel or input channels combination selected to drive the output channel) -- refer to section PRESET PARAMETERS (p.39):
A: IN A B: IN B +: sum of IN A and IN B (A+B) -: difference between IN A and IN B (A-B)
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31
Operation
Using quick access functions
Quick access functions are available directly from the main screen.
Locking/Unlocking the front panel
The front panel can be locked to prevent unintentional operations. � To lock: press and hold simultaneously the ESC and OK keys until Display Locked is displayed. � To unlock: press and hold simultaneously the ESC and OK keys until Display Unlocked is displayed
CLIP -5dB -10dB -25dB SIGNAL LOAD
L-NET
8
System Message Display Locked
MENU
ESC
OK
OUT 1
OUT 2
OUT 3
OUT 4
IN A
IN B
Muting/Unmuting an output channel
By default, all output channels are muted in all factory presets (the OUT LEDs are lit). � To unmute an output channel: press the corresponding OUT key for less than 0.3 seconds. � To mute an output channel: press the corresponding OUT key for less than 0.3 seconds.
The screen displays MUTE OUT and the mute status of each output channel for 2 seconds.
example: unmuting OUT1
CLIP -5dB -10dB -25dB SIGNAL LOAD
L-NET
8
MUTE OUT OFF ON ON
MENU
ON
ESC
OK
OUT 1
OUT 2
OUT 3
OUT 4
IN A
IN B
Gain can be set before unmuting.
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LA8 owner's manual (EN) version 19.1
Operation
Modifying gain
About this task Gain can be modied for sets of output channels having input channels in common in their input selections. Examples of output channels having input channels in common:
INPUT SELECTION
A
B
A+B A-B
� The OUT1 key displays gain for OUT1, OUT3 and OUT4 (containing IN A) � The OUT2 key displays gain for OUT2, OUT3 and OUT4 (containing IN B) � The OUT3 and OUT4 keys display all channels (containing IN A and/or IN B) For individual gain settings, refer to section PRESET PARAMETERS (p.39).
Procedure
1. Press and hold the OUT key of the corresponding output channel. The screen displays the gain values of all the output channels having an input channel in common.
example with OUT3 displaying OUT3 and OUT4 (IN B)
CLIP -5dB -10dB -25dB SIGNAL LOAD
L-NET
8
GAIN OUT(dB)
B
MENU
1.5 1.5
ESC
OK
OUT 1
OUT 2
OUT 3
OUT 4
IN A
IN B
2. Turn the encoder wheel to modify the gain values. Turn the encoder wheel to modify gain by steps of 0.1 dB, or Press and turn simultaneously the encoder wheel to modify gain by steps of 1 dB.
3. Release the OUT key to return to the main screen.
Identifying an amplied controller
If the amplied controller is connected to the L-NET network, it can be identied among other amplied controllers on the Workspace of LA Network Manager (refer to the LA Network Manager Help). To identify an amplied controller, press and hold the encoder wheel. On the Workspace of LA Network Manager, the amplied controller blinks in yellow. On the amplied controller, the L-NET and OUT LEDs ashes and the screen displays IDENTIFICATION and the complete IP.
CLIP -5dB -10dB -25dB SIGNAL LOAD
L-NET
8
IDENTIFICATION MENU
192.168. 1.110
ESC
OK
OUT 1
OUT 2
OUT 3
OUT 4
IN A
IN B
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33
Operation
Displaying input level, input selection, input mode and group information
Press and hold the ESC or the OK key to display information about the input level, the input selection, the input mode and the group(s) the amplied controller is assigned to.
� The LED meters and the rst line of the screen display information about input channels IN A and IN B respectively from left to right: � The SIGNAL to CLIP LEDs (1) indicate the level of the signal of the corresponding input channel.
Input voltage values The SIGNAL LED is lit when the input voltage reaches -38 dBu (analog audio source) or -60 dBFS (digital audio source). The CLIP LED is lit when the input voltage reaches +22 dBu (analog audio source) or -0.1 dBFS (digital audio source). Reminder: -38 dBu = 10 mV, 22 dBu = 9.8 V. � The LOAD LED (2) is lit if the corresponding input channel is part of the input selection of at least one output channel. � The rst line of the LCD screen (3) indicates the input mode and status of input channel pairs AB. � The second line of the screen indicates the group names (if any) of output channels OUT1, OUT2, OUT3 and OUT4 respectively from left to right -- refer to section CLEAR GRP PARAMS (p.41). In case of multiple group assignations, the screen displays mult_grp.
CLIP -5dB -10dB -25dB SIGNAL LOAD
1
L-NET
2
8
AES 44k1
3
MENU
[mult_grp] [All] 4
ESC
OK
OUT 1
OUT 2
OUT 3
OUT 4
IN A
IN B
For example, in the illustration:
� The signal of channel IN A has a level of -10 dB and the signal of channel IN B has a level of -20 dB (1). � Channels IN A and IN B are selected (2). � The IN A/IN B pair receives an AES/EBU signal of 44.1 kHz (3). � Channels OUT1 and OUT2 are assigned to the same set of groups, OUT3 is not assigned to any group, and OUT4
is assigned to group All (4).
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LA8 owner's manual (EN) version 19.1
Using the main menu
The main menu gives access to functions and submenus.
LOAD PST USER
LOAD PST FACTORY
STORE PRESET
DELETE PRESET
PRESET PARAMETERS CLEAR GRP PARAMS
INPUT SETTINGS
MONITORING & INFO
OPTIONS
IP SETTINGS
The vertical arrows on the left indicate the current position in the menu:
The page is the rst in the menu. Turn the encoder wheel clockwise to display the other pages.
The page is between the rst and last in the menu. Turn the encoder wheel clockwise or counterclockwise to display the other pages.
The page is the last in the menu. Turn the encoder wheel counterclockwise to display the other pages.
The horizontal arrows on the right indicate submenus availability:
Indicates a submenu is available. Press the OK key or the encoder wheel to access it.
No submenu is available.
Procedure
1. From the main screen, press and release the encoder wheel. 2. Turn the encoder wheel to select the page.
A page is selected when it is displayed on the top line of the screen. 3. Press the OK key or the encoder wheel to enter the page.
To return to the main screen, press the ESC key.
Operation
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35
Operation
Main menu pages
LOAD PST (p.36) STORE PRESET (p.38) DELETE PRESET (p.39) PRESET PARAMETERS (p.39) CLEAR GRP PARAMS (p.41) INPUT SETTINGS (p.42) MONITORING & INFO (p.46)
OPTIONS (p.47)
IP SETTINGS (p.50)
load a user preset (from memories 1 to 10) load a factory preset (from memories 11 to 199) save the current preset (including current settings) as a user preset (in a memory from 1 to 10) delete a user preset (in memory from 1 to 10) set parameters for gain, delay, polarity and input selection remove the group parameters dened in LA Network Manager (name, gain, delay, and Contour EQ) set the input mode, fallback mode and AES/EBU gain
display real-time measured values: RMS output voltage and output temperature (in percentage of the maximum values) display rmware and preset library versions and amplied controller's MAC address
set the amplied controller's delay unit and screen contrast reset audio parameters, or all parameters to factory settings
set the amplied controller's IP settings (IP address, subnet mask and gateway)
All parameters can also be selected from LA Network Manager. Refer to the LA Network Manager Help.
LOAD PST
A preset can be loaded from two pages:
page LOAD PST USER LOAD PST FACTORY
memory range
contents
1 to 10 (read and write) User presets stored by user -- refer to STORE PRESET (p.38)
11 to 199 (read only)
Factory preset library created by L-Acoustics and automatically installed during rmware update (refer to the LA Network Manager Help)
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LA8 owner's manual (EN) version 19.1
Example with a factory preset:
Operation
LOAD PST FACTORY STORE PRESET
OK
LOAD PRESET K1 011:K1
068:SB18_60
100
SB_A SB_A SB_B SB_B
LOAD PRESET SB18 068:SB18_60
OK
LOAD PRESET
OK
ARE YOU SURE?
GROUP CONFLICT! OK CLEAR GROUP PARAM?
CLEAR GROUP PARAM? OK
OUTPUTS MUTED!
ESC
068:SB18_60
100
SB_A SB_A SB_B SB_B
group parameters cleared
group parameters maintained
068:SB18_60
100
SB_A SB_A SB_B SB_B
Procedure
1. From the main menu, select LOAD PST USER or LOAD PST FACTORY.
When selecting LOAD PRESET USER, the amplied controller displays NO PRESETS AVAILABLE! when all user memories are empty. Press the ESC key to cancel. 2. Turn the encoder wheel and select the preset. The rst line displays LOAD PRESET and the preset family name to help make a coarse selection.
The second line displays the preset name to select within a family.
If a user preset has a customized name, press and hold the encoder wheel to display the original name -- refer to section STORE PRESET (p.38).
3. Press the OK key to load the selected preset. The amplied controller displays ARE YOU SURE?
4. Press the OK key or the encoder wheel to validate (or press the ESC key to cancel). -- The amplied controller displays CLEAR GROUP PARAM? OUTPUTS MUTED! when it is assigned to groups and is no longer connected to the L-NET network.
Either press the OK key to load the preset while clearing the group parameters Or press the ESC key to load the preset while maintaining the group parameters -- The amplied controller displays GROUP CONFLICT! CLEAR GROUP PARAM? when it is assigned to groups and there is a group conict. Loading the preset is only possible while clearing the group parameters.
Either press the OK key to load the preset while clearing group parameters Or press the ESC key twice to cancel -- The amplied controller displays GROUP CONFLICT! CANNOT LOAD PRESET! when it is assigned to groups and there is a group conict, but it is not possible to clear the group parameters as the amplied controller is connected to the L-NET network.
Press the ESC key twice to cancel.
Possible group conicts: The output channels are assigned to groups and the assignation structure is not compatible with the channel sets of the preset to be loaded. Group parameters include enabled FIR lters (Zoom Factor, FIR1, FIR2, FIR3, FIR4, or Air Absorption Compensation) and the preset to be loaded is a low latency preset.
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37
Operation
STORE PRESET
The currently loaded preset, including all modied settings, can be stored to a user memory (in memory location 1 to 10).
Unsaved modications to the preset parameters are indicated by a star sign at the end of the rst line. Unsaved modications are lost if the preset is reloaded prior to storing. However, the current state of a loaded preset is saved when the amplied controller is turned off.
STORE PRESET
DELETE PRESET
OK
STORE USER PRESET 001:
+OK
ENTER PRESET NAME 002:_K1
002:MY K1
100
LF_A LF_A MF_A HF_A
ENTER PRESET NAME OK 002:MY K1_
OVERWRITE? 002:MY K1
OK
OK
ENTER PRESET NAME
002:_MY K1
Procedure
1. From the main menu, select STORE PRESET. 2. Turn the encoder wheel and select the user memory space. 3. Press the OK key or the encoder wheel to validate. 4. If necessary, enter a user preset name (16 characters max):
a) Turn the encoder wheel to select the rst character. b) Press the encoder wheel to set the cursor on the second character. c) Repeat until all characters are entered.
Pressing the encoder wheel after the 16th character sets the cursor back to the rst character.
5. Press the OK key to validate the name. The controller displays OVERWRITE?, when the selected memory space is not empty. Press the OK key to overwrite (or the ESC key to cancel).
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LA8 owner's manual (EN) version 19.1
DELETE PRESET
A user preset stored in a user memory (in memory range 1 to 10) can be deleted.
Operation
DELETE PRESET
PRESET PARAMETERS
OK
DELETE USER PRESET OK 002:MY K1
DELETE USER PRESET OK ARE YOU SURE?
011:K1
100
LF_A LF_A MF_A HF_A
Procedure
1. From the main menu, select DELETE PRESET.
The amplied controller displays NO PRESETS AVAILABLE! when all user memories are empty. Press the ESC key to cancel. 2. Turn the encoder wheel to select the user memory space. 3. Press the OK key or the encoder wheel to validate.
The amplied controller displays CANNOT DELETE THE CURRENT PRESET, when the selected preset is the currently loaded preset. It is not possible to delete the currently loaded preset. Press the ESC key to cancel.
The amplied controller displays ARE YOU SURE?. 4. Press the OK key or the encoder wheel to validate (or press the ESC key to cancel).
PRESET PARAMETERS
The preset parameters include gain, delay, polarity and input selection.
PRESET PARAMETERS OK GAIN (dB)
CLEAR GRP PARAMS
0.0 0.0 0.0 0.0
DELAY (ms)
0.00 0.00 0.00 0.00
POLARITY
+
+
+
+
INPUT SELECTION
A
A
B
B
RESET PRESET
Gain and delay value ranges Gain is adjustable from -60 dB to +15 dB. Delay is adjustable from 0 to 680 ms -- see also section DELAY UNIT (p.48).
Total delay The total delay includes all group delays (set in LA Network Manager) and the output channel delay. Total delay cannot exceed 680 ms.
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39
Operation
The parameters of the currently loaded preset can be set individually for each output channel or channel set.
Channel set In certain presets, some channels are interdependent and form a channel set. Within a channel set the preset parameters are common to all channels. On the amplied controller's screen, channel sets are indicated by brackets above the corresponding output channel keys.
GAIN(dB)
[ 0.0 ][ 1.5 ]
GAIN(dB)
[
0.0
]
OUT 1
OUT 2
OUT 3
OUT 4
Two 2-channel sets (LF/HF - LF/HF)
OUT 1
OUT 2
OUT 3
OUT 4
One 4-channel sets (LF/LF/MF/HF)
Setting the preset parameters
GAIN (dB)
DELAY (ms)
POLARITY
0.0 0.0 0.0 0.0 0.00 0.00 0.00 0.00 +
+
+
OUT1+
OUT1+
OUT1+
GAIN (dB)
DELAY (ms)
POLARITY
0.1 0.0 0.0 0.0 0.01 0.00 0.00 0.00 -
+
+
OUT2+
GAIN (dB)
0.1 0.1 0.0 0.0
INPUT SELECTION
+
A
A
B
B
OUT1+
INPUT SELECTION
+
C
A
B
B
Procedure
1. From the main menu, select PRESET PARAMETERS. 2. Turn the encoder wheel to select a preset parameter (GAIN (dB), DELAY (ms), POLARITY or INPUT
SELECTION). 3. Press and hold the output key of an output channel or one of the output keys of a channel set to select it. 4. Turn the encoder wheel to select the value.
Gain and delay value setting Turn the encoder wheel for ne resolution (last digit). Press and turn the encoder wheel for coarse resolution (second to last digit). 5. Release the output key. 6. Repeat steps 3 to 5 for each output channel or channel set. 7. Repeat steps 2 to 5 for each preset parameters.
Preset parameter modications apply immediately.
Saving preset parameters Preset parameter modications are not automatically saved and are lost if the preset is reloaded.
Refer to STORE PRESET (p.38).
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LA8 owner's manual (EN) version 19.1
Operation
Resetting the preset parameters All preset parameters (including preset name) can be reset to the default values.
RESET PRESET
OK
ARE YOU SURE? OUTPUTS MUTED!
OK 011:K1
100
LF_A LF_A MF_A HF_A
Procedure
1. From the main menu, select PRESET PARAMETERS. 2. Turn the encoder wheel to select RESET PRESET. 3. Press the OK key or the encoder wheel to validate.
The amplied controller displays ARE YOU SURE? OUTPUTS MUTED!. 4. Press the OK key or the encoder wheel to validate (or the ESC key to cancel).
Resetting the parameters of a user preset (stored in memory space 001 to 010) only affects the current parameters. To reset the parameters of a stored preset, overwrite the memory space after resetting the preset. Refer to STORE PRESET (p.38).
CLEAR GRP PARAMS
Group parameters (names, gains, delays, contour EQs) are dened in LA Network Manager and cannot be accessed from the amplied controller. They remain active when the amplied controller is disconnected from the computer running LA Network Manager (in standalone mode), and when the amplied controller is shut down or restarted. Group parameters are not preset-dependent and remain active when a different preset is loaded.
Therefore, L-Acoustics recommends to clear group parameters when an amplied controller is used in standalone mode after being used within a network.
To verify if output channels are assigned to a group, refer to Displaying input level, input selection, input mode and group information (p.34).
CLEAR GRP PARAMS does not clear the preset parameters. Refer to PRESET PARAMETERS (p.39)
clearing the group parameters
CLEAR GRP PARAMS OK INPUT SETTINGS
ARE YOU SURE? OUTPUTS MUTED!
OK 011:K1
100
LF_A LF_A MF_A HF_A
Procedure
1. From the main menu, select CLEAR GRP PARAMS.
The amplied controller displays L-NET ACTIVE. CANNOT CLEAR when the amplied controller is connected to the L-NET network. Group parameters cannot be cleared when the amplied controller is remotely controlled by LA Network Manager. Press the ESC key to cancel.
The amplied controller displays NO GROUP DEFINED. CANNOT CLEAR when the amplied controller is not assigned to any group. Press the ESC key to cancel. 2. Press the OK key or the encoder wheel to validate. The amplied controller displays ARE YOU SURE? OUTPUTS MUTED!. 3. Press the OK key or the encoder wheel to validate (or press the ESC key to cancel).
LA8 owner's manual (EN) version 19.1
41
Operation
INPUT SETTINGS
The INPUT SETTINGS menu gives access to settings of the input mode, the fallback mode and the AES/EBU gain.
INPUT SETTINGS
OK INPUT MODE
MONITORING & INFO
ANALOG
FALLBACK MODE
OFF
AES/EBU GAIN
+0.0dB
INPUT MODE
The XLR connectors of the signal panel can receive analog or digital signals. Use INPUT MODE to select the type of signal, depending on the type of connected audio sources.
Selecting the input mode
INPUT MODE ANALOG
OK INPUT MODE >ANALOG<
+OK INPUT MODE
AES/EBU LOCK 44k1
Procedure
1. From the main menu, select INPUT SETTINGS. 2. Press the OK key or the encoder wheel to validate. 3. Turn the encoder wheel to select INPUT MODE. 4. Press the OK key or the encoder wheel to validate. 5. Turn the encoder wheel to select between the input modes (ANALOG for analog audio source, AES/EBU for digital
audio source). 6. Press the OK key or the encoder wheel to validate.
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Operation
AES/EBU signal status When AES/EBU is enabled, the status of the signals is displayed:
LOCK and the sampling frequency
LOCK-WARN UNLOCKED
INVALID
Indicates a digital audio source is connected to the AES/EBU input, the signal delivered by the source has a format supported by the controller's digital audio board, and no loss or fault is being detected during data transfer.
For example, LOCK 44k1 indicates the digital audio source provides signals of sampling frequency of 44.1 kHz.
Indicates the incoming digital signal has a sampling frequency that is out of the nominal range, but it does not lead to loss of audio.
Indicates the incoming digital signal is faulty and leads to loss of audio.
If the fallback mode is active, UNLOCKED on the AES/EBU signal automatically switches to the analog signal. AN.FBACK and the status of the signal on the AES/EBU input is displayed. Refer to section FALLBACK MODE (p.44).
The LOCK status is re-acquired after at least 500 ms of stability.
Indicates non-audio data in the payload or errors in the AES/EBU transmission.
INPUT MODE
AES/EBU LOCK 44k1
INPUT MODE
AN.FBACK LOCK 44k1
INPUT MODE
AES/EBU LOCK-WARN
INPUT MODE
AN.FBACK LOCK-WARN
INPUT MODE
AES/EBU UNLOCKED
INPUT MODE
AN.FBACK UNLOCKED
INPUT MODE
AES/EBU
INVALID
INPUT MODE
AN.FBACK INVALID
Reverting from fallback When the LOCK status is recovered on the AES/EBU signal, reverting to the initial input mode is manual.
INPUT MODE
OK INPUT MODE
OK INPUT MODE
AN.FBACK LOCK 44k1
>AES/EBU< LOCK 44k1
AES/EBU
LOCK 44k1
Procedure
1. From the INPUT MODE menu, press the OK key. 2. Turn the encoder wheel to select the input mode. 3. Press the OK key or the encoder wheel to validate.
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Operation
FALLBACK MODE
Sound cuts in case of digital signal failure on the AES/EBU input can be avoided with the fallback option. When automatic fallback is enabled (ON), the amplied controller automatically switches the analog input in case of digital signal failure. The switchover conditions are:
� No clock � Loss of lock � CRC error � Bipolar encoding error � Data slip
Validity bit (invalid audio) value does not trigger a fallback. Instead the signal is muted. Reverting to digital input when the digital signal returns to a normal state is manual -- refer to INPUT MODE (p.43). It can also be done simultaneously for all amplied controllers in LA Network Manager. When automatic fallback is disabled (OFF), sound is cut off in case of digital signal failure on the AES/EBU input, but sound is automatically recovered when the signal returns to a normal state.
Enabling the fallback mode
FALLBACK MODE OFF
OK FALLBACK MODE >OFF<
+OK FALLBACK MODE
ON
Procedure
Precautions to avoid sound cuts or level differences upon fallback The analog inputs must be connected to an audio source playing the same program as the digital audio source connected to the AES/EBU input. The level of the digital audio source connected to the AES/EBU input must be aligned to the level of the analog audio source using AES/EBU GAIN -- refer to section AES/EBU GAIN (p.45). 1. From the main menu, select INPUT SETTINGS. 2. Press the OK key or the encoder wheel to validate. 3. Turn the encoder wheel to select FALLBACK MODE. 4. Press the OK key or the encoder wheel to validate. 5. Turn the encoder wheel to select the setting (ON or OFF). 6. Press the OK key or the encoder wheel to validate.
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Operation
AES/EBU GAIN
AES/EBU GAIN must be used when the fallback mode is enabled.
This gain allows aligning the digital audio source level to the analog level for a seamless fallback switch -- refer to section FALLBACK MODE (p.44). It can be set from -12 dB to +12 dB by steps of 0.1 dB.
This gain must be set according to the analog audio source's calibration (based on manufacturer's specs or user measurements) and the amplied controller's analog inputs calibration (0 dBFS for an input signal of +22 dBu). These examples illustrate the most common cases:
analog audio source calibration +18 dBu for 0 dBFS +24 dBu for 0 dBFS +22 dBu for 0 dBFS or, if fallback is disabled
AES/EBU gain - 4 dB + 2 dB + 0 dB
OUT1+
AES/EBU GAIN
+0.0dB
AES/EBU GAIN +2.0dB
Procedure
1. From the main menu, select INPUT SETTINGS. 2. Press the OK key or the encoder wheel to validate. 3. Turn the encoder wheel to select AES/EBU GAIN. 4. Press and hold the ESC, OK or OUT1 key. 5. Turn the encoder wheel to select an input value.
Setting applies in real-time.
Turn the encoder wheel for steps of 0.1 dB. Press and turn the encoder wheel for steps of 1 dB. 6. Release the key.
AES/EBU GAIN
+2.0dB
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Operation
MONITORING & INFO
The MONITORING & INFO menu provides real-time measurements and information on the amplied controller: � For each output channel: � real-time RMS output voltage (in percentage of the maximum value supported by the connected transducer section) � output temperature (in percentage of the operating range) � Version numbers of the amplied controller onboard rmware and preset library. � Amplied controller's MAC address.
MONITORING & INFO
MONITORING & INFO OK SPK HANDLING (%)
OPTIONS
12% 10% 13% 11%
OUT CH TEMP (%) 44% 42% 43% 42%
FIRMWARE
V2.6.0
PRESET LIBRARY V5.5
MAC ADDRESS
00.1B.92.01.02.1B
SPK HANDLING (%)
SPK HANDLING (%) (speaker handling) displays the RMS voltage measured at each individual amplier circuit output as a percentage of the maximum voltage supported by the connected speaker section. For example in this illustration, the RMS voltage of channels OUT 1 to OUT 4 is respectively 12, 10, 13, and 11% of the maximum values.
OUT CH TEMP (%)
OUT CH TEMP (%) (output channel temperature) displays the temperature measured at each individual amplier circuit output as a percentage of the maximum operating temperature supported by the amplied controller: 85� C / 185� F = 100%. For example in this illustration, the temperature of channels OUT 1 to OUT 4 is respectively 52, 53, 50, and 48% of the maximum values. Refer to Error messages (p.58) for information on the temperature-related messages.
FIRMWARE
FIRMWARE displays the version number of the amplied controller onboard rmware. Press the encoder wheel to display the fourth digit and the build date (in the YYYYMMDD format).
FIRMWARE V2.6.0
FIRMWARE 20160112
V2.6.0.14
Network Always ensure that all LA8 amplied controllers used in a given network run the same rmware version.
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PRESET LIBRARY PRESET LIBRARY displays the version number of the amplied controller onboard preset library. Press the encoder wheel to display the third digit.
PRESET LIBRARY V5.5
PRESET LIBRARY V5.5.1
Operation
Refer to the Preset Guide for the full description of the factory preset library.
MAC ADDRESS
MAC ADDRESS displays the MAC (Media Access Control) address of the amplied controller. This address is unique to each amplied controller and is the equivalent of an international identication serial number. It is set by the manufacturer and cannot be modied. For example, in this illustration, the MAC address is 00:1B:92:01:90:3A.
OPTIONS
The OPTIONS menu gives access to the amplied controller general settings: � delay unit (ms, meters, feet or samples) � LCD screen contrast � reset audio conguration � reset to default factory settings
OPTIONS IP SETTINGS
OK DELAY UNIT
ms
SCREEN CONTRAST 80%
RESET AUDIO
CONFIGURATION?
RESET TO FACTORY DEFAULT SETTINGS?
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Operation
DELAY UNIT Delay values can be displayed in ms (milliseconds), meters, feet or samples. The values in meters and feet are given for a temperature of 20� C / 68� F.
DELAY UNIT ms
OK
DELAY UNIT
>ms<
+OK DELAY UNIT
SAMPLES
Procedure
1. From the main menu, select OPTIONS. 2. Press the OK key or the encoder wheel to validate. 3. Turn the encoder wheel to select DELAY UNIT. 4. Press the OK key or the encoder wheel to validate. 5. Turn the encoder wheel to select the value.
SCREEN CONTRAST
The LCD screen contrast can be modied to adapt to a very bright or very dark environment.
SCREEN CONTRAST OK
SCREEN CONTRAST
80%
>80%<
Procedure
1. From the main menu, select OPTIONS. 2. Press the OK key or the encoder wheel to validate. 3. Turn the encoder wheel to select SCREEN CONTRAST. 4. Press the OK key or the encoder wheel to validate. 5. Turn the encoder wheel to select the value. 6. Press the OK key or the encoder wheel to validate.
+OK SCREEN CONTRAST 90%
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Operation
RESET AUDIO CONFIGURATION?
The audio conguration of the amplied controller can be reset. This includes the following parameters:
� Input settings: � input mode � fallback mode � AES/EBU GAIN
� Settings protection � Group parameters � User presets
RESET AUDIO
OK
CONFIGURATION?
RESET AUDIO CONFIG ARE YOU SURE?
OK
011:K1
100
LF_A LF_A MF_A HF_A
Procedure
Clearing user presets implies loading the preset from memory 011.
1. From the main menu, select OPTIONS. 2. Press the OK key or the encoder wheel to validate. 3. Turn the encoder wheel to select RESET AUDIO CONFIGURATION?. 4. Press the OK key or the encoder wheel to validate.
The amplied controller displays RESET AUDIO CONFIG, ARE YOU SURE?. 5. Press the OK key or the encoder wheel to validate (or the ESC key to cancel).
RESET TO FACTORY DEFAULT SETTINGS?
The amplied controller settings can be reset to the factory default.
RESET TO FACTORY OK RESET AMP TO FACTORY OK
DEFAULT SETTINGS?
ARE YOU SURE?
Initializing Controller
011:K1
103
LF_A LF_A MF_A HF_A
Procedure
Amplied controllers default settings include loading the preset from memory 011. The amplied controller retains its IP address. 1. From the main menu, select OPTIONS. 2. Press the OK key or the encoder wheel to validate. 3. Turn the encoder wheel to select RESET TO FACTORY DEFAULT SETTINGS?. 4. Press the OK key or the encoder wheel to validate. The amplied controller displays RESET AMP TO FACTORY, ARE YOU SURE?. 5. Press the OK key or the encoder wheel to validate (or the ESC key to cancel). The amplied controller launches the start-up sequence. When complete, the amplied controller displays the main screen.
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Operation
IP SETTINGS
The IP SETTINGS menu gives access to the amplied controller's IP address, and to advanced network settings (subnet mask and gateway).
IP SETTINGS
OK ADDRESS 192. 168.
1.100
SUBNET MASK
255. 255. 255. 0
GATEWAY 0. 0.
0. 0
Remote control of processors and amplied controllers requires setting up a private local area Ethernet network to interconnect up to 253 units (and additional devices such as Ethernet switches / AVB bridges) with a single control computer. This Ethernet network, called L-NET, uses L-COM PROTOCOL, a proprietary communication protocol based on TCP/IPv4.
An IP address is a unique identier for a network device on a given IP network. In IPv4 networking, it is made of 4 bytes (32 bits). An IP address is composed of a subnet address and a host address. The host address serves as a unique device identier on the subnet. The subnet mask determines how many bits dene the subnet address, and how many dene the host address.
By convention, the rst possible number of the host address is reserved to designate the subnet, and the last number is reserved to communicate with all devices of the subnet (IP broadcast address).
The factory default IP settings of all L-Acoustics devices are:
� IP address: 192.168.1.100 � Subnet address: 192.168.1.0/24 � IP broadcast address: 192.168.1.255 � Subnet mask: 255.255.255.0
With these settings, the rst three bytes of the IP address (192.168.1) dene the subnet address, and the last byte is the host address (100).
In general, it is recommended to:
� Use the default subnet address and subnet mask. � Edit the device host address to provide a unique identier to each unit: use consecutive IP addresses starting from
192.168.1.1 up to 192.168.1.253. � Set the control computer to 192.168.1.254.
However, it is possible to congure other IP settings when required by network administration. Subnet mask may be dened from 255.0.0.0 to 255.255.255.0, and the IP and gateway addresses must both belong to one of the following IP ranges (standards for Private Local Area Networks):
� 10.0.0.1 to 10.255.255.254 � 100.64.0.1 to 100.127.255.254 � 172.16.0.1 to 172.31.255.254 � 169.254.0.1 to 169.254.255.254 (not recommended) � 192.168.0.1 to 192.168.255.254
LA Network Manager and its host computer must be using the same subnet and Subnet mask as the units.
Make sure that:
� The IP address is included in one of the supported IP ranges. � The gateway is set to an IP belonging to the same subnet, or is set to 0.0.0.0 if not used.
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Operation
ADDRESS modifying the IP address
ADDRESS 192. 168.
1. 100
OUT4 /
ADDRESS 192. 168.
1. >100<
ADDRESS 192. 168.
OK /
1. >101<
ESC
ADDRESS 192. 168.
1. 101
ADDRESS 192. 168.
1. 100
Procedure
1. From the main menu, select IP SETTINGS. 2. Press the OK key or the encoder wheel to validate. 3. Long-press the OUT4 key or press the encoder wheel to select the last byte. 4. Turn the encoder wheel to select a value for the byte.
Turn the encoder wheel for 1-step resolution. Press and turn the encoder wheel for 10-step resolution. 5. Press the OK key or the encoder wheel to apply, or the ESC key to cancel. 6. If needed, set another byte (rst, second or third number) as follows: a) Long-press the OUT key under the byte to select it. b) Turn the encoder wheel to select a value. c) Press the OK key or the encoder wheel to apply. d) On the computer hosting LA Network Manager, congure the same subnet.
Refer to the LA Network Manager Help (in User guide > General). e) In LA Network Manager:
1. Click the L-Acoustics logo and select Options. 2. Enter the corresponding values in IP Range to scan for L-NET.
Values for the rst byte (rst number) are restricted to Private Local Area Network prexes: 10, 100, 169, 172, and 192. For the rst three bytes, set all Units of a system to the same values (for instance 192.168.1) for remote control by LA Network Manager.
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Operation
SUBNET MASK
The widest subnet mask that can be used is 255.255.255.0. Wider subnet masks, such as 255.255.255.128, are not supported.
LA Network Manager and its host computer must be using the same subnet and Subnet mask as the units.
modifying the Subnet mask
SUBNET MASK
255 . 255 . 255 . 0
OUTx /
SUBNET MASK >255 . 255 . 255 . 0<
SUBNET MASK >255 . 255 . 254 .
OK /
0<
ESC
SUBNET MASK
255 . 255 . 254 . 0
SUBNET MASK
255 . 255 . 255 . 0
Procedure
1. From the main menu, select IP SETTINGS. 2. Press the OK key or the encoder wheel to validate. 3. Turn the encoder wheel to select SUBNET MASK. 4. Press any OUT key or the encoder wheel to select the Subnet mask. 5. Turn the encoder wheel to select a value for the Subnet mask. 6. Press the OK key or the encoder wheel to apply, or press the ESC key to cancel. 7. On the computer hosting LA Network Manager, congure the same Subnet mask.
Refer to the LA Network Manager Help (in User guide > General).
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Operation
GATEWAY
A gateway IP address is an advanced setting reserved for specic applications such as amusement parks, campuses, and multi-room venues with a centralized third-party supervision tool (SNMP, Crestron, Extron, Q-SYS). In such contexts, the supervision tool is often located in a different subnet that is interconnected with the subnets of the units. Interconnection is achieved thanks to a gateway. The gateway address must be set on the units to enable communication with the supervision tool.
modifying the gateway
GATEWAY 0. 0.
0. 0
OUT4 /
GATEWAY 0. 0.
0 .> 0<
GATEWAY 192 . 168 .
OK /
1 .>253<
ESC
GATEWAY 192 . 168 .
1 . 253
GATEWAY 0. 0.
0. 0
Procedure
1. From the main menu, select IP SETTINGS. 2. Press the OK key or the encoder wheel to validate. 3. Turn the encoder wheel to select GATEWAY. 4. Long-press the OUT key under a byte to select it. 5. Turn the encoder wheel to select a value for the selected byte. 6. Press the OK key or the encoder wheel to apply, or the ESC key to cancel.
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Operation
Settings protection
Some settings can be protected from modications.
Settings protection can only be enabled and disabled from LA Network Manager. Refer to the LA Network Manager Help and the Settings Protection technical bulletin.
When settings protection is enabled, some settings are completely locked, and the protection on the others can be temporarily bypassed by a 4-digit PIN code.
setting quick access to gain on OUT1 to OUT4
LOAD PST FACTORY STORE PRESET DELETE PRESET
PRESET PARAMETERS (all parameters) CLEAR GRP PARAMS NETWORK ADDRESS
RESET TO FACTORY DEFAULT SETTINGS?
protection locked
PIN code protected PIN code protected
locked PIN code protected PIN code protected PIN code protected
locked
When settings protection is enabled and a user tries to modify a setting:
� Locked settings: � Screen displays ACCESS LOCKED. � Settings cannot be modied. � Press the ESC key to cancel.
� PIN code protected settings: � Screen display ENTER PIN. � Enter the PIN code to temporarily bypass the protection or press the ESC key to cancel.
ACCESS LOCKED
ENTER PIN:
?
?
?
?
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LA8 owner's manual (EN) version 19.1
Entering a PIN code
OUT1+ OUT2+ OUT3+ OUT4+
OK
ENTER PIN:
?
?
?
?
ENTER PIN:
3
?
?
?
ENTER PIN:
3
5
?
?
ENTER PIN:
3
5
1
?
ENTER PIN:
3
5
1
8
Procedure
1. Press and hold the OUT1 key. 2. Turn the encoder wheel to select the rst digit of the PIN code. 3. Release the OUT1 key. 4. Repeat step 1 to 3 with the OUT2, OUT3 and OUT4 keys. 5. Press the OK key or the encoder wheel to validate.
If the controller returns to the ENTER PIN screen, the entered PIN code is wrong.
Repeat step 1 to 5 with the right PIN code, or press the ESC key to cancel.
Operation
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Corrective maintenance
Corrective maintenance
Introduction
Presentation
This section is intended for end users and gathers the level 1 procedures. This manual contains the maintenance operations authorized for the end user. Performing another operation exposes to hazardous situations.
Troubleshooting and diagnosis (p.57) This section contains the diagnosis tables and procedures to identify the issues and how to address them. Exploded view (p.63) This illustration gives an overview of the order in which the elements must be disassembled and reassembled. Each assembly refers to the corresponding D/R procedure and the necessary repair kit(s). Disassembly and Reassembly procedures (p.64) This section contains the maintenance procedures for each assembly identied in the exploded view. Inspection and preventive maintenance (p.17) These checks allow to detect an issue. The preventive maintenance must be performed regularly.
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Corrective maintenance
Troubleshooting and diagnosis
For any issue, consider the diagnosis tables for the possible causes and inspection procedures (if any).
Before applying any procedure, consider the Exploded view (p.63) to get acquainted with the disassembly/ reassembly procedures to perform before and after.
Interface issues
"black screen" and no LEDs when the controller is on
possible cause power cord is not connected
mains failure or incompatible voltage power cord damaged amplied controller on standby other causes
diagnosis / procedure
� Check that the power cord is connected to mains. � Check that the powerCON is properly connected and
locked.
Check that mains are available and that voltage is compatible (120 V AC - 230 V AC � 10%, 50 Hz - 60 Hz for LA8/LA8US, 100 V AC - 200 V AC (� 10%), 50 Hz 60 Hz for LA8JP).
Inspect the power cord. If necessary, replace it.
Connect the amplied controller to a computer running LA Network Manager (the L-NET connector LEDs turn on) and switch the amplied controller to the operating mode.
Contact L-Acoustics.
LCD screen lit but nothing is displayed ("blue screen")
� controller connected to a non-compatible network: Unplug all cables from the L-NET connectors and restart the controller.
� condensing humidity into the LCD screen: Put the controller in a non-condensing environment and wait until the LCD screen is dry.
� Contact L-Acoustics.
LCD screen lit but dark
� Other causes: Contact L-Acoustics.
any action from the front interface has no effect
(controller not in standby mode and not locked, refer to the LA Network Manager help) � Contact L-Acoustics.
one LED in a meter does not work (while the other LEDs of this meter work)
� Contact L-Acoustics.
the L-NET LED does not work when online
(refer to the LA Network Manager help) � Contact L-Acoustics.
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Corrective maintenance
L-NET network issues
impossible to connect a controller to the L-NET network (controller not in "blue screen") Refer to the LA Network Manager help for software use.
possible cause LA Network Manager is set in ofine mode selected scanning range does not contain the amplied controller IP address amplied controller is set with an incorrect IP address, or several amplied controller are set with the same IP address
L-NET cable is not plugged or incorrectly plugged
diagnosis / procedure
Select the online mode.
Include the amplied controller IP address into the scanning range.
Set the computer IP address and subnet mask and the amplied controller IP address as indicated in the LA Network Manager help.
Plug and secure CAT5e U/FTP cables into the L-NET connectors on the amplied controllers to connect it to the other amplied controllers, the computer or to the Ethernet switch (each of the amplied controller connectors can be equally used as an IN or LINK connector): The ACT/LINK LEDs should turn on.
Refer to the LA Network Manager help.
L-NET cable is damaged
more than two software clients are already connected to the amplied controller rmware failure
Replace any damaged CAT5e U/FTP cable in the network chain.
Disconnect all other software clients.
Restart the amplied controller.
other causes
Contact L-Acoustics.
Error messages
A system message blinks. There is a corresponding event message in LA Network Manager (refer to the LA Network Manager Help)
Mains voltage messages
LA8 uses an auto-sensing SMPS (Switched Mode Power Supply) compatible with mains input nominal voltages of 120 V AC - 230 V AC (� 10%) (LA8, LA8US) or 100 V AC - 200 V AC (� 10%) (LA8JP). The mains voltage is continuously monitored for under and over-voltage and for failure in alternating cycles.
System Message Fuseprotect
System Message Waiting SMPS
Displayed if the mains voltage reaches a value 30 % to 20 % below nominal. The outputs are muted. Normal operation resumes when mains voltage returns to nominal state.
Displayed if the mains voltage reaches a value 30% below nominal or 10% above nominal, or if it skips about two cycles. The SMPS is switched off and the outputs are muted. A soft start sequence begins automatically when mains voltage returns to nominal state.
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Corrective maintenance
Output channel external error messages
The output channels are continuously monitored for external errors.
Error on channel # Channel muted
Displayed if an external error is detected at an output channel (typically due to a short-circuit in a cable). The channel is muted. Check the loudspeakers cables and connectors, including link cables. If the issue persists, verify the connected loudspeaker enclosures. The channel is automatically unmuted when the issue is solved.
If the error persists after disconnecting all cables and rebooting, the controller must be sent to an L-Acoustics representative for maintenance.
Output channel internal error messages
The output channels are continuously monitored for internal errors.
DC on channel # Channel muted
DC on channel # Channel disabled
Error on channel # Channel disabled
Displayed if a sporadic DC voltage above 3 V is detected at an output channel. The channel is muted. The channel is automatically unmuted when returning to nominal state.
Displayed if a persistent DC voltage above 3 V is detected at an output channel. The channel is disabled. To re-activate the channel, the controller must be restarted manually when the issue is solved.
Displayed if a cross-conduct in the power stage is detected at an output channel. The channel is disabled.
If the error persists after disconnecting all cables and rebooting, the controller must be sent to an L-Acoustics representative for maintenance.
Network message
System Message Invalid L-NET client
Displayed if the unit detects a connection attempt from a version of LA Network Manager that is not compatible with the unit rmware (typically because the version of LA Network Manager is too old to manage the latest rmware features). Update LA Network Manager to version 2.3.0.0 minimum.
Other messages
System Message Update error
High temp on ch # Channel attenuated
Over temp on ch # Channel muted
Speaker fault ch # Channel muted
Displayed if the rmware update has failed. Try to restart the unit. If the issue persists, check that each L-NET cable is in working order and is correctly plugged on both ends, and relaunch the update process. If the issue persists, contact L-Acoustics.
Displayed if temperature at an output channel is above 85� C. The signal delivered at the output channel is attenuated until temperature returns to nominal conditions.
Displayed if temperature at an output channel is above 96� C. The signal delivered at this output channel is muted until the temperature returns to nominal conditions.
Displayed if the unit detects a short-circuit fault in the speaker coil or the input board of the connected enclosure. The output channel is muted to avoid a potential risk of physical harm and further damages to the product. Verify the connected loudspeaker enclosures. Disconnect or replace the faulty enclosure, then unmute the output channel.
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Corrective maintenance
For temperature-related messages
possible cause
diagnosis / procedure
room temperature is too high / too low
Make sure room temperature is within amplied controller operating condition range (0� C / 32� F to +50� C / 122� F).
foam lter clogged, inside of amplied controller dusty
Clean or replace the foam lter, clean the amplied controller with an air blower.
Install the amplied controller in an open area so that the front and rear panels are not blocked by an external objects or structure.
amplied controller is not getting enough cool air
If rack-mounted:
� Do not block the ventilation grill with front and back panels or doors, or use a forced ventilation system.
� When stacking more than one amplied controller, mount them directly on top of one another or close the free spaces with blank panels.
Monitor the channel LED meter:
channel resources are solicited to their limits
In case of persistent high level or clip, reduce the audio source output level (refer to the third-party documentations) or the gain value on the channel.
loudspeaker impedance too low
Check that nothing causes a short-circuit at the output (incorrect cabling scheme, damaged cable or short-circuit in the speaker voice coil).
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Corrective maintenance
Sound issues
no sound with no error message
(amplied controller is not in standby mode. Refer to the LA Network Manager help)
possible cause mains failure outputs are muted
incorrect input mode
diagnosis / procedure Inspect the mains. Unmute the outputs. If the fallback mode is ON, switch it OFF. Select the input mode according to the audio source format (analog or AES/EBU).
incorrect preset selection gain value is too low on the amplied controller
Select a preset in accordance with the loudspeaker system connected to the outputs.
Set an appropriate gain value on channels OUT1 to OUT4.
If the AES/EBU input mode is selected, set an appropriate AES/EBU input gain value.
audio source is not plugged, incorrectly plugged, or plugged into the wrong input connector audio source cable is damaged incorrect settings on the audio source non-audible bit stream
audio source failure
Plug/Replug and secure each XLR cable into the audio source and the corresponding input connector on the amplied controller (analog input connector for analog audio source, AES/EBU input connector for AES/EBU audio source).
Replace the XLR cable.
Set appropriate parameter values on the audio source, in particular the output gain value (refer to the third-party documentation).
Check that the AES/EBU source does not deliver non-audio bit stream (for example encoded audio).
Inspect the audio source for failure.
Reminder: A digital audio source can meet the following failures: no clock, loss of lock, invalid audio (validity bit), CRC error, bipolar encoding error, data slip.
loudspeaker not plugged, incorrectly plugged, or plugged into the wrong output connector
loudspeaker cable is damaged loudspeaker is damaged
Plug/Replug and secure each speakON cable into the loudspeaker and the corresponding output connector on the amplied controller.
Replace the loudspeaker cable.
If only one loudspeaker is connected, inspect it.
other causes
Contact L-Acoustics.
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Corrective maintenance
noise, level loss, distorted sound, white noise (no error message)
possible cause AES/EBU audio source is connected to an analog input
gain value too high on the amplied controller
diagnosis / procedure
Check the input signal cabling and check that the input mode has been selected accordingly in the INPUT SETTINGS menu.
Set an appropriate gain value on channels OUT1 to OUT4.
If the AES/EBU input mode is selected, set an appropriate AES/EBU input gain value.
output gain value too high on the audio source
switch to the analog fallback mode with incorrect AES/ EBU input gain value
Set an appropriate output gain value on the audio source (refer to the third-party documentation).
Set an appropriate AES/EBU input gain value and inspect the digital audio source for failure.
Reminder: A digital audio source can meet the following failures: no clock, loss of lock, invalid audio (validity bit), CRC error, bipolar encoding error, data slip.
incorrect preset selection audio source cable incorrectly plugged
Select a preset in accordance with the loudspeaker system connected to the outputs.
Unplug the XLR cable and plug it again on the audio source and the amplied controller.
Verify with the installer if ground loops can occur.
audio source cable damaged
Replace the XLR cable.
incorrect settings on the audio source
Set appropriate parameter values on the audio source (refer to the third-party documentation).
audio source failure
Inspect the audio source for failure.
Plug/Replug and secure each speakON cable into the
loudspeaker incorrectly plugged or plugged into the wrong output connector
loudspeaker and the corresponding output connector on the amplied controller.
Verify with the installer if ground loops can occur.
loudspeaker cable damaged loudspeaker is damaged
Replace the speakON cable. If only one loudspeaker is connected, inspect it.
other causes
Contact L-Acoustics.
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Corrective maintenance
Exploded view
In the exploded view, each assembly corresponds to a D/R procedure and the necessary repair kit(s).
External modules
rear bracket KR LABRACKET
foam filter KR LAXMOU
front frame KR LAXGRI
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Corrective maintenance
Disassembly and Reassembly procedures D/R - Front frame
Repair kit KR LAXGRI Kit front grill for LA series
�1 761 front frame Procedure 1. Pull the front frame at one side and remove it from the amplied controller. 2. Insert the two sides of a front frame into the holes on the amplied controller without locking.
Place the logo on the right. 3. Place the foam lter between the front frame and the amplied controller. 4. Push the front frame on both sides until it is fully inserted.
A click must be heard on each side.
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D/R - Foam lter
Repair kit KR LAXMOU Kit 10 front foams for LA series
Corrective maintenance
�1 762 foam lter
Procedure
1. Pull on a front frame side without removing it from the amplied controller. 2. Do the same on the other side. 3. Remove the foam lter. 4. If the foam lter is intended to be cleaned, use mild dishwashing detergent or soap and then dry it. 5. Place a foam lter between the front frame and the amplied controller. 6. Push the front frame on both sides until it is fully inserted.
A click must be heard on each side.
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Corrective maintenance
D/R - Rear bracket
Repair kit KR LABRACKET Kit rear brackets LA4/LA4X/LA8/LA12X
�1 G1815 amplied controller rear bracket Exploded view
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Specications
Specications
All values given in this section are typical values.
General
Output power EIA (1% THD, 1 kHz, all channels driven)
Maximum output voltage Amplication class Digital Signal Processor (DSP) Frequency response 20 Hz - 20 kHz Distortion THD+N (20 Hz - 10 kHz) Output dynamic range Amplication gain Noise level Channel separation Damping factor Output delay
4 � 1100 W RMS, 4 � 1300 W peak (at 8 ) 4 � 1800 W RMS, 4 � 1800 W peak (at 4 or 2.7 )
150 V (Peak voltage, no load) class D SHARC 32 bit, oating point, 96 kHz sampling rate � 0.15 dB at 8 < 0.0005% , at 8 , 11 dB below rated power 107 dB (20 Hz - 20 kHz, 8 A-weighted) 32 dB - 67 dBV (20 Hz - 20 kHz, 8 A-weighted) > 85 dB (at 1 kHz) > 600 (1 kHz and below, 8 ) 0 ms to 680 ms
Mains input power and current draw (all channels driven)
Maximum output power 1/3 output power (-5dB) 1/8 output power (-9 dB) Idle Standby
4 � 1800 W at 4 22 A / 3100 W 11 A / 1500 W
4 � 1100 W at 8 15 A / 1950 W 10 A / 1300 W 0.5 A / 115 W < 0.1 A / 12 W
Current values given for mains rated at 230 V. Multiply by: � 2.3 for 100 V � 2 for 120 V � 1.15 for 200 V
If the voltage exceeds a � 10% range, the maximum power is no longer guaranteed.
Power supply
Model Mains rating
Nominal current requirements
Switched Mode Power Supply (SMPS) LA8/LA8US/LA8CN: 120 V AC - 230 V AC (� 10%), 50 Hz - 60 Hz LA8JP: 100 V AC - 200 V AC (� 10%), 50 Hz - 60 Hz
LA8/LA8US/LA8CN: 16 A for 230 V / 30 A for 120 V LA8JP: 30 A for 100 V / 15 A for 200 V
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Specications
Circuit breaker
Operating conditions Room Temperature Temperature inside controller Protection Circuits protection
Transducers protection
Fans Fans noise (free eld, 1 m) Interface and connections Indicators
Interface Output connectors L-NET connectors
Input signal distribution
Connectors Input
Link
USB
Use these references, or equipment with equivalent characteristics: 100-120 V: 30 A, Schneider Electric Square D 30A QO (in North America), or Mitsubishi CP30-BA-M (in Japan) 200-240 V: 15 A (LA8JP) / 16 A (LA8/LA8US/LA8CN), Class C
0 �C / 32 �F to 50 �C / 122 �F 0�C / 32� F to 85� C / 185� F
heat sinks and transformers temperature monitoring inrush-current limitation main supply failure and over-voltage detection output DC protection output over-current protection L-DRIVE:
excursion temperature over-voltage 2 fans, temperature-controlled speed at minimum speed: 24 dBA at maximum speed: 42 dBA
1 LED for L-NET information For each output: 7 LEDs for mute, load, signal, levels and limit/clip information 2 � 20 characters LCD screen 2 � 4-point speakON 1 � 8-point CA-COM 2 fast Ethernet RJ45 (in/out)
3 Neutrik� female XLR3, IEC 268, ESD protected: 2 for analog 1 for digital
3 Neutrik� male XLR3, IEC 268, ESD protected: 2 for analog 1 for digital (electronically buffered, failsafe relay)
1 Mini-B type female USB (not used)
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powerCON, etherCON, speakON, Neutrik are registered trademarks of Neutrik AG. CA-COM is a trademark of ITT Cannon.
Specications
Analog input
Input impedance Maximum input level A/D conversion
22 k (balanced) 22 dBu (balanced, THD 1%) 2 cascaded 24-bit analog/digital converters (130 dB dynamic range)
Digital input
Supported operating mode
Standard Sampling frequency (Fs) Word length
Sample Rate Converter (SRC)
Sampling frequency Word length Dynamic range Distortion THD+N Bandpass ripple
Automatic fallback option
Switchover conditions Constant delay Constant level Revert to initial input
Input gain
Range Steps
AES/EBU (AES3) or electrical S/PDIF (IEC 60958 Type II) 44.1, 48, 64, 88.2, 96, 128, 176.4, or 192 kHz 16, 18, 20, or 24 bits
96 kHz (SRC referenced to the amplied controller internal clock) 24 bits 140 dB < -120 dBFS (dB Full Scale) �0.05 dB (20 Hz - 40 kHz, 96 kHz)
no clock, loss of lock, CRC error, bipolar encoding error, or data slip independent from input Fs upon manual user selection AES/EBU gain, independent from input Fs upon manual user selection
-12 dB to +12 dB 0.1 dB
Latency
Analog and AES/EBU In standard operating mode In low latency operating mode
3.84 ms (independent from input Fs) 1.18 ms (independent from input Fs)
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Specications
Physical data
Height Weight Finish
483 mm / 19 in
433 mm / 17 in
2U 12.2 kg / 26.9 lb black and anthracite gray
406 mm / 16 in
420 mm / 16.5 in 7.6 mm / 0.3 in
465 mm / 18.3 in
76 mm / 3 in
88 mm / 3.5 in
390 mm / 15.4 in
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Glossary
Glossary
CE CHK CN D/R INSP JP KR LA8 LA8CN LA8JP LA8US N.m SMPS US
Europe check procedure China disassembly/reassembly procedure inspection procedure Japan repair kit CE version of the LA8 amplied controller (when used along with "LA8CN", "LA8JP" or "LA8US") CN version of the LA8 amplied controller JP version of the LA8 amplied controller US version of the LA8 amplied controller newton meter, international torque unit, 1 N.m = 9 in lbf Switched Mode Power Supply (power supply inside of the amplied controller) United States
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Approvals
Approvals
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LA8 is certied with the following:
S&E
Approvals
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L-Acoustics
13 rue Levacher Cintrat - 91460 Marcoussis - France +33 1 69 63 69 63 - info@l-acoustics.com www.l-acoustics.com