User Manual for spl models including: Headphone Amplifier and Preamplifier, Professional Fidelity Mastering Grade Listening
Balanced. ON. Phonitor x – User Manual. Headphone Amplifier and Preamplifier. This User Manual is optimized for. Acrobat Reader. Interactive buttons may not.
Professional Fidelity Mastering Grade Listening This User Manual is optimized for Acrobat Reader. Interactive buttons may not appear in other applications. MI N Lef t 2 5° Right MAX 5 3 4 2 CROSSFEED XLR RCA Digital SOURCE USB Optical Coaxial DIGITAL Phonitor x Off On MATRIX Center LATERALIT Y VOLTAiR 120V DC Audio Rail 30° 40° 2° 5 ANGLE Mute OUTPUT Stereo Mono MODE VOLUME ON Balanced Standard Preamplifier & Headphone Amplifier Phonitor x User Manual Headphone Amplifier and Preamplifier Welcome and thank you for choosing the Phonitor x. The Phonitor x is the ultimate headphone amplifier. It offers connections for headphones operated both balanced and unbalanced. With up to 3.7 W output power the Phonitor x delivers an impressive performance. The Phonitor x is not just a headphone amplifier, but also an excellent preamplifier that can drive power amplifiers or active speakers. VOLTAiR technology is what we also call the SPL 120V Rail Technology within the Professional Fidelity series. This makes the Phonitor x an outstandig device in terms of dynamic range, signal-to-noise ratio and headroom delivering an exceptional sound experience with invincible serenity, transparancy and realness. MI N Lef t 2 VOLUME 5° Right MAX 5 3 4 2 CROSSFEED XLR RCA Digital SOURCE USB Optical Coaxial DIGITAL Phonitor x Off On MATRIX Center LATERALIT Y VOLTAiR 120V DC Audio Rail 30° 40° 2° 5 ANGLE Mute OUTPUT Stereo Mono MODE VOLUME ON Balanced Standard Preamplifier & Headphone Amplifier ~ 115V AC / ~230V AC, 50 Hz / 60 Hz, P max. 45 W SPEAKER OUTPUTS Voltage Selection: 1. Remove Fuse Holder 2. Exchange Fuses 3. Flip Over 4. Reinstall Fuses: 230V AC: T 500 mA L 250 V 115V AC: T 1 A L 250 V CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN AVIS: RISQUE DE CHOC ÉLECTRIQUE · NE PAS OUVRIR DIP SWITCHES ON BOTTOM SIDE: 1 ON: HP Out +22dB 2 ON: HP Out +12dB 3 ON: VU 0 = +10dB 4 ON: XLR Direct Out 5 ON: RCA Direct Out 6 ON: AMP CTL power off when listening to WIRING XLRs: balanced, Pin 2 = Hot (+) For unbalanced operation bridge Pin 3 to GND. RCAs: Unbalanced, Tip = Hot (+) ANALOG SOURCES DIGITAL SOURCES L R L R L R L AMP CTL A L L COAX Phonitor x Serial Number Made in Germany IR B PGM Refer to Manual Connect to SPL Power Amp(s) for remote power on/off AMP CTL R R L SPEAKER OUTPUTS R R R L ANALOG SOURCES OPTICAL USB DIGITAL SOURCES 2 Content Getting started 4 Front view 5 Rear view 6 Bottom view 7 DIP switches 7 VOLTAiR 120V Rail Technology 8 Comparisons 9 Phonitor Matrix 11 Basics of stereo listening 11 Stereo listening with an "traditional" headphone preamplifier 12 How does the Phonitor Matrix work? 13 Angle 14 Crossfeed 15 Setting of Crossfeed and Angle 16 Adjustment of the Phonitor Matrix 18 Matrix On/Off 19 Source selection 20 Output selection 21 MODE switch 22 Laterality 22 VU meters 23 AMP CTL (Amplifier Control) 24 IR Remote control 25 DIP switches 27 Level increase of the headphone output 27 Attenuate the sensitivity of the VU meters 27 Slave Thru 28 Standby of connected Performer s800 power amp when set to Headphone 28 Specifications 29 Inputs 29 Outputs 30 Internal operating voltages 32 Power supply 32 Dimensions (incl. feet) 33 Weight 33 Important Notes 34 Declaration of CE Conformity 34 Getting started Getting started Read thoroughly and follow the instructions as well as the security advices of the Quickstart which is enclosed in the scope of delivery! You can also download the Quickstart here. By pressing the By pressing the By pressing the By pressing the By pressing the -Button you get to the table of contents. -Button you get to the front view of the unit. -Button you get to the rear view of the unit. -Button you get to the bottom view of the unit. -Button you get to the previous content. 4 Front view 3 Phonitor Matrix On/Off Crossfeed 4 Angle 5 MI N Lef t 2 5° Right MAX 5 3 4 2 CROSSFEED XLR RCA Digital SOURCE USB Optical Coaxial DIGITAL Phonitor x Off On MATRIX Center LATERALIT Y VOLTAiR 120V DC Audio Rail 30° 40° 2° 5 ANGLE Mute OUTPUT Stereo Mono MODE VOLUME Front view 2 VU Meters 1 Standby ON Balanced Standard Preamplifier & Headphone Amplifier Laterality 6 7 Volume 13 Standard Headphone 9 Digital Source Mode Switch 10 12 Balanced Headphone 8 Analog Source 11 Output/Mute Switch 5 Rear view Mains Voltage 14 Mains Switch 13 Rear view 15 Analog Audio Inputs 16 Digital Audio Inputs optional Voltage Selection: 1. Remove Fuse Holder 2. Exchange Fuses 3. Flip Over 4. Reinstall Fuses: 230V AC: T 500 mA L 250 V 115V AC: T 1 A L 250 V CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN AVIS: RISQUE DE CHOC ÉLECTRIQUE · NE PAS OUVRIR DIP SWITCHES ON BOTTOM SIDE: 1 ON: HP Out +22dB 2 ON: HP Out +12dB 3 ON: VU 0 = +10dB 4 ON: XLR Direct Out 5 ON: RCA Direct Out 6 ON: AMP CTL power off when listening to WIRING XLRs: balanced, Pin 2 = Hot (+) For unbalanced operation bridge Pin 3 to GND. RCAs: Unbalanced, Tip = Hot (+) DIGITAL SOURCES ANALOG SOURCES SPEAKER OUTPUTS L R L R ~ 115V AC / ~230V AC, 50 Hz / 60 Hz, P max. 45 W VOLUME L R L AMP CTL A L L COAX Phonitor x Serial Number Made in Germany IR B PGM Refer to Manual Connect to SPL Power Amp(s) for remote power on/off AMP CTL R R L SPEAKER OUTPUTS R R R L ANALOG SOURCES OPTICAL USB DIGITAL SOURCES IR PGM Volume 17 AMP CTL 18 19 Audio Outputs 6 Bottom view DIP switches Factory setting 7 Bottom view 20 DIP Switches VOLTAiR 120V Rail Technology VOLTAiR 120V Rail Technology VOLTAiR is the synonym for our 120V Rail Technology within the Professional Fidelity series. The audio signals are processed with an unequalled +/-60V DC, which corresponds to twice that of discrete operational amplifiers and four-times that of semiconductor operational amplifiers. VOLTAiR Technology reaches outstanding technical and sonic performances. Technically especially in terms of dynamic range and headroom and sonically especially in reproducing the finest details and delivering a totally relaxed sounding audio experience. Music sounds absolutely natural. SPL's 120V Rail Technology is the internal audio processing voltage (+/- 60V DC). It is not to be confused with the external mains voltage (e.g. 115V or 230V AC). 8 Comparisons VOLTAiR 120V Rail Technology These diagrams show how our VOLTAiR Technology compares to other circuits. The direct relation between operating level and maximum level is fundamental for the classification: the higher the operating level, the higher the maximum level a circuit can handle. And since virtually all essential acoustic and musical parameters depend on this relation, a higher operating voltage also has a positive impact on the dynamic range, distortion limit and signal-to-noise ratio. Operating Voltage Volt 120 120 V 100 80 60 40 30 V 20 0 + / - 15 Volt + / - 60 Volt Dynamic Range dB 145 140 141,4 135 130 125 124,2 120 OPA 134@30 V SPL-OP@120 V 9 VOLTAiR 120V Rail Technology Do bear in mind that dB scales do not represent linear but rather exponential increases. A 3 dB increase corresponds to doubling the acoustic power, +6 dB correspond to twice the sound pressure level, and +10 dB correspond to twice the perceived loudness. When it comes to volume, the VOLTAiR Technology exhibits a performance, in regard to maximum level and dynamic range, that is twice that of common components and circuits given that its values are approximately 12 dB higher. THD measurements show a difference of more than 8 dB compared to the TL071 at 30 V -- in terms of sound pres- sure level, that corresponds to an improvement of more than 130%. The operating level most commonly used for audio equipment is +/- 15 volts. Max. Audio Level THD&N dBu 35 33,2 30 25 dBu -105 -106 -107 20 21,5 -109 15 10 5 0 OPA 134@30 V SPL-OP@120 V -111 -113 -115 TL 071@30 V -114,2 SPL-OP@120 V 10 Phonitor Matrix Phonitor Matrix Basics of stereo listening When listening to speakers sound coming from the right is not only perceived with the right ear (red line) but it is also perceived with the left ear (green line). The sensation is time delayed, lower in level and has a reduced frequency range (this applies to the left speaker accordingly). Sound from the right side Sound from the left side It arrives later because the signal travels a distance of approx. 340 meters per second and the distance from the right speaker to the left ear is longer than it is to the right ear. It is quieter and does not deliver the full frequency range, because the signal of the right speaker does not directly arrive at the left ear but is partially reflected and absorbed by the head. 11 Phonitor Matrix Our brain determines the direction of the sound by perceiving the time delay (interaural time difference) and the level difference (interaural level difference). Stereo listening with an "traditional" headphone preamplifier When listening to music with a traditional headphone amplifier, the right ear only perceives the right signal (red line) and the left ear only perceives the left signal (green line). The delayed and quieter signal of the respective opposite side is missing. This unnatural sound irritates the ear and is stressful for our brain, because it constantly is busy trying to locate the direction of the sound. Besides, this super-stereo-effect leads to an exaggerated stereo width. Instruments that are placed in the stereo field appear to be located much further outside than desired. These unnatural effects are corrected by the Phonitor Matrix. 12 How does the Phonitor Matrix work? Phonitor Matrix In simple terms, the Phonitor Matrix creates a speaker-like listening experience on headphones. It calculates the time and level differences with their specific frequency responses to deliver a true rendition of a speaker playback. Because time and level differences are set like real loudspeaker placement, the brain is able to correctly identify the direction of the sound. You can perceive a speaker-like listening experience. All instruments appear at the correct position within the stereo image just like it was intended when it was mixed in the studio. In comparison to a traditional headphone amplifier it provides the best conditions minimizing hearing fatigue. 13 Phonitor Matrix In Detail An analog filter design creates interaural time and level differences for four different speaker placements. This analog filter design is controlled by the crossfeed and angle parameters. Angle With the ANGLE switch you adjust the interaural time difference which is related to the placement of the speakers. ° ° ° ° ° ° ° ° 14 Crossfeed Phonitor Matrix Crossfeed defines the interaural level difference. The six crossfeed values approximate the influences of room size, reflection and absorption characteristics. Frequency corrected level difference at max. Crossfeed and 30° Angle of the right channel (red = right signal, green = left signal) Frequency corrected time difference at max. Crossfeed and 30° Angle of the right channel (red = right signal, green = left signal) µs , , , , k k Hz k k Hz The interaural level difference and the interaural time difference are frequency-corrected because the sound is reflected and absorbed by the head in a non-linear fashion. 15 Setting of Crossfeed and Angle Phonitor Matrix Both parameters (Crossfeed and Angle) define the interaural level difference and the interaural time difference. To reproduce the exact placement of the loudspeakers, first choose the Angle parameter closest to your real speaker placement. Afterwards choose the recommended Crossfeed Parameter (see table on page 17, e.g.: Angle: 30°, Crossfeed: 3). A vast number of factors, e.g. type of loudspeakers, room acoustics or the individual perception, influence the stereo-listening. This is why the Phonitor x offers six different switch positions to finely adjust the Crossfeed and to best match to your speaker playback. MI N 2 5° MAX 5 3 4 2 CROSSFEED Phonitor x Off On MATRIX 30° 40° 2° 5 ANGLE 16 Table: Settings of Crossfeed and Angle Angle parameter 22° 30° 40° 55° Crossfeed parameter MAX 5 4 3 2 MIN MAX 5 4 3 2 MIN MAX 5 4 3 2 MIN MAX 5 4 3 2 MIN Interaural level difference 0,24 0,35 0,40 0,47 0,50 0,60 0,40 0,49 0,56 0,64 0,70 0,76 0,26 0,34 0,40 0,49 0,50 0,60 0,34 0,44 0,50 0,58 0,52 0,70 Interaural time difference (µs) 133 165 210 220 230 250 205 235 260 280 300 335 290 355 400 455 480 535 350 405 450 490 525 555 Phonitor Matrix Speaker angle 15° 20° 20° 25° 25° 30° 20° 25° 30° 30° 30° 40° 30° 40° 45° 45° 55° 70° 40° 45° 50° 55° 65° 70° 17 Adjustment of the Phonitor Matrix Phonitor Matrix By using the CROSSFEED switch (4) and the ANGLE switch (5) you can adjust the headphone playback through the Phonitor x to your room with your loudspeaker setup. · Play some audio material you know well with the Phonitor x and go to a place where you usually listen to music through speakers. Mute · Toggle between headphones and loudspeakers by using the OUTPUT switch (11). OUTPUT · Set the ANGLE switch according to your loudspeaker placement (see page 14). · Then set the CROSSFEED switch to the value that comes closest to your familiar loud- 30° 40° 2° 5 speaker-listening sound. Listen to the instruments panned in the stereo field. These instruments shall have the same positions on headphones. ANGLE 3 4 2 5° MI N 2 MAX 5 CROSSFEED 18 Matrix On/Off With the MATRIX switch (3) you activate or deactivate the Matrix of the Phonitor x. The Phonitor Matrix is available for headphone outputs only. The Speaker Outputs (19) at the rear of the unit are not fed by the Phonitor x matrix. Phonitor Matrix Off On MATRIX 19 Source selection Source selection The Phonitor x is not just a headphone amplifier. It is also a preamplifier with up to five audio sources. It features two analog stereo inputs XLR and RCA (15). Phonitor x can be equipped with a DA converter. With that installed the available inputs are expanded by USB, coaxial and optical digital stereo inputs (16). · Select an analog audio source by using the SOURCE switch (8) RCA or XLR. XLR RCA Digital · You can select an digital audio source (USB, coaxial, optical) by using the DIGITAL SOURCE switch (9). Set the SOURCE switch to Digital. USB Optical Coaxial DIGITAL Signals at analog RCA input (12), will be amplified from HiFi level to studio level. The sources are then equal in level when you switch between XLR and RCA (provided that a stu- dio signal is present at the XLR input). 20 Output selection Output selection With the OUTPUT switch (11) you send an input signal to a selected output Loudspeakers or Mute headphones. OUTPUT In the Mute position no signal passes through to the outputs. The VU meter are illuminated in red. Set to the loudspeaker setting, the selected input signal passes through to both analog audio outputs RCA and XLR. Please note that the standard headphone output (13) takes priority over the balanced headphone output (12). There is no signal at the balanced headphone output if a headphone is already plugged into the standard headphone output. To protect the headphone power amplifier stage and guarantee a long and consistent performance please note: · Turn down VOLUME before swapping headphones. · Never insert a mono jack plug into the front panel stereo jack. · Make sure that the headphones stereo jack is fully inserted. · If you use an adapter from 3,5 mm to 1/4" (6,35 mm) on your headphone make sure that the adapter is fully screwed on respectively fully plugged in. 21 MODE switch By using the MODE switch (10) you can switch the audio signal to Stereo, Stereo with Laterality control and Mono. In Mono mode, both stereo channels are summed. The mono signal maintains the same loudness, because both stereo channels are each reduced by 6 dB. MODE switch Stereo Mono MODE Laterality Laterality refers to the deviation of sound perception to either side of the ears. With the Laterality control (6) you can compensate perceived volume differences between channels that may be due to a hearing impairment. This control differs from conventional balance controls. If one channel is attenuated, the other one is increased at the same time. This means that, e.g. when hard left, the level of the left channel increases Center by 2.25 dB while the right channel is attenuated by 2.25 dB. Lef t This control has a narrower range than conventional balance controls. Its resolution is very fine, which means it can be peciseley adjusted. Set the MODE switch to LATERALITY to control the laterality (see above). LATERALIT Y Right 22 VU meters VU meters The VU meters (2) display the input levels for the selected source. The meter indicates levels from -20 dB to +5 dB. 0 dB corresponds to +4 dBu. If necessary you can lower the sensitivity by 10 dB so that the meters go up to +15 dB intput level (see "DIP switches" on page 27). The ballistics of the VU meters guarantee an optimal visual perception. The time calibration of the VU meters complies with the requirements of the BBC. The rise time up to 0 dB is about 300 ms. % + VU % + VU If the VU meters light up red permanently even if the Phonitor x is unmuted the protection circuit has been activated. The output connectors are disconnected from the amplifier via a relay to protect the connected headphones. Please contact your local dealer for repair service. 23 AMP CTL (Amplifier Control) AMP CTL (Amplifier Control) If you own a SPL Performer s800 you can connect the AMP CTL (18) of the Phonitor x with a mono mini jack cable to the AMP CTL of the Performer s800 to switch both units in and out of standby together. Use a 3.5 mm mono mini jack cable. The Phonitor x offers two outputs (A and B) in case you use two Performer s800 in bridge mode or in a bi-wiring application. Set the DIP switch 6 on the bottom of the unit to ON to switch the Performer s800 into standby when the output selection is set to Headphone (see "Standby of connected Performer s800 power amp when set to Headphone" on page 28). AMP CTL A B Connect to SPL Power Amp(s) for remote power on/off AMP CTL 24 IR Remote control IR Remote control The volume potentiometer can be remotely controlled using any infrared (IR) remote control. The special feature is that the Phonitor x learns your remote and not the other way around. You do not need a universal remote control. Take, for example, the remote control of the CD player. Out of the many buttons there are two you hardly use if at all. Assign Volume up / Volume down to these two buttons and let the Phonitor x learn them. · While learning the IR remote control commands set the OUTPUT switch (11) to Mute. Mute VU meters light up red. OUTPUT VOLUME · Press the PGM IR VOLUME button (17) on the rear of the unit until you note the actuation point. The Power LED now lights up brighter. · Point your remote control towards the VU meters (2) and push the button you wish to IR use to lower the volume. The power LED flashes once per push. Press the same button PGM repeatedly until the power LED flashes three times within a short interval programming this button is then completed. 25 · Point your remote control towards the VU meters (2) and push the button you wish to use to increase the volume. The power LED flashes once per push. Press the same button repeatedly until the power LED flashes three times within a short interval programming this button is then completed. IR Remote control · Learn mode ends automatically after the second button is learned. · Please note: direct insolation of strong light (e.g. sun light, halogen lamps, neon tubes, fluorescent tubes, terrarium and aquarium lights as well as big flat screens) may lead to misoperation of the remote control functions. 26 DIP switches With the DIP switches (20) on the bottom of the unit the following settings can be chosen: DIP switches Level increase of the headphone output By using the DIP switches 1 and 2 you can increase the level of the headphone outputs to better feed power-hungry headphones. DIP switch 1: ON = The headphone output is boosted to +22 dB. DIP switch 2: ON = The headphone output is boosted to +12 dB. DIP switch 1 and 2: ON = If both DIP switches 1 and 2 are ON, a boost of +24 dB is applied. Attenuate the sensitivity of the VU meters With DIP switch 3 you can attenuate the sensitivity of the VU meter by 10 dB. With the switch activated, a value of +15 dB input level can be displayed. DIP switch 3: ON = The sensitivity of the VU meter is attenuated by 10 dB. In this case 0 dB on the VU meter represent a value of +10 dBu. 27 Slave Thru DIP switches By using DIP switches 4 and 5 the chosen input passes directly to the outputs. DIP switch 4: ON = The chosen input passes directly to the XLR output without being affected by the volume control. (Slave Thru). DIP switch 5: ON = The chosen input passes directly to the RCA output without being affected by the volume control. (Slave Thru). Standby of connected Performer s800 power amp when set to Headphone By using the DIP switch 6 units which are connected to AMP CTL ( Performer s800 power amp) are set to standby to save power when the output selection is set to Headphone. DIP switch 6: ON = Units which are connected to AMP CTL ( Performer s800 power amp) are switched into standby to save power when the output selection is set to . 28 Specifications Inputs XLR inputs · Neutrik XLR, balanced, Pin 2 = (+) · Impedance: ca. 20 kohms · CMR: -82 dBu (at 1 kHz) · Max. Input level: +32.5 dBu RCA inputs · Unbalanced · Impedance: ca. 10 kohms · Max. Input level: +32.5 dBu Digital inputs (optional DAC192 - 1670, until 2019) / sample rates · Coaxial SPDIF (RCA) - sample rates PCM (kHz): 44.1, 48 , 88.2, 96, 176.4, 192 · Optical TOSLINK (F06) sample rates PCM (kHz): 44.1, 48 , 88.2, 96 · USB (B) sample rates PCM (kHz): 44.1, 48 , 88.2, 96, 176.4, 192 29 Specifications Digital inputs (optional DAC 768xs - 1850, from 2019) / sample rates · Coaxial SPDIF (RCA) - sample rates PCM (kHz): 44.1, 48 , 88.2, 96, 176.4, 192 · Optical TOSLINK (F06) sample rates PCM (kHz): 44.1, 48 , 88.2, 96 · USB (B) Encoded PCM (kHz): 44.1, 48 , 88.2, 96, 176.4, 192, 352.8, 384, 705.6, 768 DSD: DSD1 (DSD64), DSD2 (DSD128), DSD4 (DSD256) Outputs Balanced headphone output · Neutrik 4-pin XLR connector · Pin wiring: 1 = L (+), 2 = L (-), 3 = R (+), 4 = R (-) · Impedance: 0.36 ohms · Damping factor: 180 @ 40 ohms · Frequency range: 10 Hz to 300 kHz ( -3 dB) · Crosstalk at 1 kHz: -90 dB · THD & N: 0.00091 % (at 0 dBu, 1 kHz, 100 kohms load) · Noise (A-weighted): -98 dBu · Dynamic range: 130.5 dB Specifications 30 Standard headphone output Specifications Warning: Never connect a mono jack cable to the standard headphone output (front panel stereo jack). Make sure that the stereo jack is fully inserted, otherwise a short circuit might damage the headphone amplifier! · 6.35 mm TRS connector · Pin wiring: Tip = Left, ring = right, sleeve = GND · Impedance: 0.18 ohm · Attenuation factor: 180 @ 40 ohms · Frequency range: 10 Hz to 300 kHz ( -3 dB) · Crosstalk at 1 kHz: -90 dB · THD & N: 0.00091% (at 0 dBu, 1 kHz, 100 kohms load) · Noise (A-weighted): -103 dB · Dynamic range: 135.5 dB Max. Output power (at +30 dBu @ 1 kHz) · 2 x 1 W at 600 Ohm impedance · 2 x 2 W at 300 Ohm impedance · 2x 3.7 W at 120 Ohm impedance · 2x 2.9 W at 47 Ohm impedance · 2x 2.7 W at 32 Ohm impedance 31 Line outputs · Neutrik XLR, balanced, Pin 2 = (+) · RCA, unbalanced · Frequency range: 4 Hz to 300 kHz (-3 dB) · Crosstalk at 1 kHz: -106 dB · THD & N: 0.00085 % (at 0 dBu, 1 kHz, 100 kohms load) · Noise (A-weighted): -103.8 dB · Dynamic range: 136.3 dB Internal operating voltages · Analog: +/- 60 V · Digital: + 5 V and + 3.3 V (optional) Power supply · Mains voltage (switchable): 230 V AC / 50 Hz or 115 V AC / 60 Hz · Fuses: 230 V: T 500 mA; 115 V: T 1 A · Power consumption: max 40 VA · Stand-by power consumption: 0.7 W 32 Specifications Dimensions (incl. feet) · (WxHxD) 10.94 x 3.94 x 12.99 in (278 x 100 x 330 mm) Weight · 9.48 lbs (4.3 kg), unit only · 11.90 lbs (5.4 kg), shipping Specifications 33 Important Notes Important Notes Version 1.6 03 /2020 Developer: Bastian Neu This manual includes a description of the product but no guarantee as for specific characteristics or successful results. Unless stated otherwise, everything herein corresponds to the technical status at the time of delivery of the product by SPL electronics GmbH. The design and circuitry are under continuous development and improvement. Technical specifications are subject to change. © 2019 SPL electronics GmbH. This document is the property of SPL and may not be copied or reproduced in any manner, in part or fully, without prior authorization by SPL. Sound Performance Lab (SPL) continuously strives to improve its products and reserves the right to modify the product described in this manual at any time without prior notice. SPL and the SPL Logo are registered trademarks of SPL electronics GmbH. All company names and product names in this manual are the trademarks or registered trademarks of their respective companies. Declaration of CE Conformity The construction of this unit is in compliance with the standards and regulations of the European Community. 34Adobe PDF Library 15.0 Adobe InDesign 14.0 (Macintosh)