Qsc Stereo Amplifier Isa1350 Users Manual
ISA1350 to the manual 0ba562dd-92ea-4ec5-853a-781947206d3e
2015-02-05
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ISA Series
Professional Power Amplifiers
ISA280 | ISA450 | ISA750 | ISA1350 | ISA300Ti | ISA500Ti | ISA800Ti
The ISA Installed System Amplifiers are designed
Features
to meet the needs of sound system designers
• Four models for low impedance applications
and contractors worldwide. Three models feature
• ISA1350 drives 70 volt lines directly with 1500 watts per channel
isolated 25, 70, and 100 volt outputs for distributed
• T hree “Ti” versions include low impedance and isolated 25, 70, and 100 volt
outputs for distributed audio systems
sound systems, while four low impedance models
are rated for 2 ohm operation. The ISA 1350 drives
70 volt lines directly with 1500 watts per channel.
Versatile loading options and a comprehensive
• ISA450 and ISA750: THX™ approved for professional cinema applications
• R
ear panel gain controls for tamper resistant operation with 2 dB detents for quick
and repeatable settings
• XLR and detachable Euro style input connectors
set of features make the ISA Series a rugged,
• D
ataPort V2 for use with DPV2 compatible signal processing accessories
(XC-3, SF-3, LF-3) and DSP-3/DSP-4 (with external power supply)
cost-effective power solution for any permanently
• Independent defeatable clip limiters for reduced distortion
installed sound system.
• S
electable high-pass filters protect speakers and prevent speaker transformer
saturation with minimal effect on program material (30 Hz or 70 Hz on non-”Ti”
models, 50 Hz or 75 Hz on “Ti” models)
ISA Power Amplifiers
Model
Watts per channel
70V*
8Ω**
4Ω**
2Ω†
• C
lass H complementary bipolar output circuitry reduces AC power draw and waste
heat by 40% on ISA750 and ISA800Ti, and by 50% on ISA1350
• Front panel indicators include power, signal, and clip (and protect on ISA1350)
ISA280
–
185
280
430
ISA450
–
260
425
700
ISA750
–
450
650
1200
ISA1350
1500††
800
1300
2000
ISA300Ti
300
185
280
430
• Stereo, bridge, or parallel operating modes
ISA500Ti
500
260
425
700
ISA800Ti
800
450
650
1200
• C
omprehensive protection circuitry including DC, infrasonic, thermal overload, and
short circuit protection
• Covered barrier strip output connectors for safety agency compliance
• A
utomatic variable-speed fan for quiet normal operation with maximum cooling
on demand
• Rear-to-front air flow keeps equipment racks cool
* 50 Hz – 16 kHz, 0.5% THD
** 20 Hz – 20 kHz, 0.1% THD
†1 kHz, 1% THD
†† Direct Output, 70V, less than 0.5% THD, 20 - 20 kHz
• 3 year warranty plus optional 3 year extended service contract
THX is a trademark of THX Ltd.
• “Ti” models have fully isolated 25, 70, and 100 volt outputs
“Ti” Models
• Isolated 25, 70, 100 volt, and low impedance outputs available simultaneously
• Simple barrier strip connection determines output mode
ISA Series
Specifications
ISA280
Stereo Mode (both channels driven)
Continuous average output power per channel
ISA450
ISA750
ISA1350
ISA300Ti
ISA500Ti
ISA800Ti
8Ω / 20 Hz - 20 kHz / 0.1% THD
185 W
260 W
450 W
800 W
185 W
260 W
450 W
4Ω / 20 Hz - 20 kHz / 0.1% THD
280 W
425 W
650 W
1300 W
280 W
425 W
650 W
2Ω / 1 kHz / 1% THD
430 W
700 W
1200 W
2000 W
430 W
700 W
1200 W
−
−
1500 W
−
−
−
Direct Ouput, Stereo Mode
70V / 20 Hz - 20 kHz / +0,-0.3 dB / 0.5% THD −
XF Output Power, Stereo Mode
70V or 100V / 50 Hz - 16 kHz / 0.5% THD
−
−
−
−
300 W
500 W
800 W
25V / 50 Hz - 16 kHz / 0.5% THD
−
−
−
−
200 W
300 W
500 W
Bridge Mono Mode
Continuous average output power
8Ω / 1 kHz / 0.1% THD
600 W
900 W
1500 W
2800 W
600 W
900 W
1500 W
4Ω / 1 kHz / 1% THD
830 W
1400 W
2400 W
4000 W
830 W
1400 W
2400 W
XF Output Power, Bridge Mono Mode
140V or 200V / 50Hz - 16 kHz / 0.5% THD
−
−
−
−
600 W
1000 W
1600 W
Signal to Noise (20 Hz - 20 kHz)
100 dB
100 dB
100 dB
100 dB
100 dB
100 dB
100 dB
Distortion (SMPTE-IM)
< 0.01%
< 0.01%
< 0.02%
< 0.01%
< 0.01%
< 0.01%
< 0.02%
Input Sensitivity at 8Ω
1.15V (+3.4 dBU) 1.07V (+2.8 dBU) 1.07V (+2.8 dBU) 1.24V (+4.1 dBU) 1.15V (+3.4 dBU) 1.07V (+2.8 dBU) 1.07V (+2.8 dBU)
Gain at 8Ω
33.4x (30.5 dB)
44.7x (33 dB)
56.2x (35 dB)
64.0x (36.1 dB)
33.4x (30.5 dB)
44.7x (33 dB)
56.2x (35 dB)
Output Circuitry
AB
AB
Class H, 2-tier
Class H, 3-tier
AB
AB
Class H, 2-tier
Distortion (typical)
20 Hz - 20 kHz: 10 dB below rated power
< 0.03% THD / 4Ω and 8Ω
1.0 kHz and below: full rated power
< 0.03% THD / 4Ω and 8Ω
Frequency Response (10 dB below rated ouput power) ISA280, ISA450, ISA750 and ISA1350: 20 Hz-20 kHz, +0/-1 dB | -3 dB points, 5 Hz and 50 kHz
ISA300Ti, ISA500Ti, ISA800Ti Direct outputs: -3 dB at 50 Hz, -0.5 dB at 20 kHz XF outputs: 50 Hz - 16 kHz, +0/-3 dB
Damping Factor (direct outputs)
> 200 at 8Ω / ISA1350: > 250
Output Regulation (isolated outputs)
< 1.5 dB
Input Impedance
10k ohms unbalanced, 20k ohms balanced
Input Clipping
10 Vrms (+22 dBu) / ISA1350: 4.53 Vrms (+15.3 dBu)
Cooling
Continuously variable speed fan, back-to-front air flow
Connectors
Input: Active balanced, 3-pin euro style detachable terminal block and XLR (pin 2+)
Output: Covered barrier strips, DataPort V2 / HD-15 connector
Controls
Front: AC switch
Rear: Ch. 1 & 2 gain knobs / 10-position DIP switch
Indicators
Power-On: Green LED | Signal: Green LED (1 per channel) | Protect: Red LED (ISA 1350) | Clip: Red LED (1 per channel)
Amplifier Protection
Full short circuit, open circuit, thermal, ultrasonic, and RF protection. Stable into reactive or mismatched loads
Load Protection
On/off muting
Triac crowbar: ISA750, ISA1350 and ISA800Ti
AC coupling: ISA280, ISA300Ti, ISA450, ISA500Ti
Dimensions (HWD)
5.25" (13.3 cm) 3 rack spaces x 19" (48.3 cm) rack mounting x 15.9" (40 cm) deep from front mounting rails
Weight
Net
36 lbs (16.3 kg)
42 lbs (19 kg)
47 lbs (21.3 kg)
68 lbs (30.8 kg) 44 lbs (20.0 kg)
49 lbs (22.3 kg) 57 lbs (26 kg)
Shipping
42 lbs (19.1 kg)
48 lbs (22 kg)
53 lbs (24.0 kg)
77 lbs (34.4 kg) 50 lbs (22.7 kg)
55 lbs (25 kg)
Power Requirements
63 lbs (28.6 kg)
100, 120, 230 VAC, 50 - 60 Hz
Specifications subject to change without notice.
1675 MacArthur Boulevard • Costa Mesa, CA 92626 • Ph: 800/854-4079 or 714/957-7100 • Fax: 714/754-6174
ISA Series Spec Sheet - 02/22/06
qscaudio.com
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