ISA1350 Professional Power Amplifier

The ISA Installed System Amplifiers are designed to meet the needs of sound system designers and contractors worldwide. Three models feature isolated 25, 70, and 100 volt outputs for distributed 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 set of features make the ISA Series a rugged, cost-effective power solution for any permanently installed sound system.

Features:

Drives 70V lines directly with 1500 watts per channel
Rear panel gain controls for tamper resistance; 2-dB detents allow for quick and repeatable settings.
XLR and detachable Euro-style input connectors
DataPort V2 for use with DPV2-compatible signal processing accessories (XC-3, SF-3, LF-3) and DSP-3/DSP-4 (with external power supply)
Independent defeatable clip limiters for reduced distortion
Selectable high-pass filters (30 Hz or 70 Hz) protect speakers and prevent speaker transformer saturation, with minimal effect on program material
Three-tier Class H complementary bipolar output circuitry reduces AC power draw and waste heat by 50%
Front panel indicators include power, signal, clip and protect
Covered barrier strip output connectors for safety agency compliance
Automatic on-demand variable-speed fan: quiet normal operation, with maximum cooling when needed
Rear-to-front air flow helps keep equipment racks cool
Stereo, bridge, or parallel operating modes
Comprehensive protection circuitry including DC, infrasonic, thermal overload, and short circuit protection
3-year warranty plus optional 3-year extended service contract

Specifications:

OUTPUT POWER PER CHANNEL, STEREO MODE, both channels driven
8Ω, 20 Hz-20 kHz 0.1% THD: 800 W
4Ω, 20 Hz-20 kHz 0.1% THD: 1300 W
2Ω 1 kHz 1% THD: 2000 W

DIRECT POWER PER CHANNEL, STEREO MODE

70V, 20 Hz-20 kHz +0/-0.3 dB 0.5% THD: 1500 W

OUTPUT POWER, BRIDGED MONO MODE

8Ω, 1 kHz 0.1% THD: 2800 W

4Ω 1 kHz 1% THD: 4000 W

Signal to Noise (20 Hz-20 kHz): 100 dB

Distortion (SMPTE-IM): Less than 0.01%

Input Sensitivity @ 8 ohms: 1.24 V (+4.1 dBu)

Maximum Voltage Gain: 64.0x (36.1 dB)

Output Circuitry: Class H, 3 tier

Weight - Net: 68 lb (30.8 kg)

Weight - Shipping: 77 lb (34.4 kg)

Distortion (Typical):

20 Hz-20 kHz: 10 dB below rated power: Less than 0.03% THD, 4 ohms and 8 ohms

1.0 kHz and below: full rated power: Less than 0.03% THD, 4 ohms and 8 ohms

Frequency Response 10 dB below rated output power:

20 Hz-20 kHz, +0/-1 dB; -3 dB points: 5 Hz and 50 kHz

Damping Factor with 8Ω Load (direct outputs): Greater than 250

Output Regulation (isolated outputs): Less than 1.5 dB

Input Impedance: 10 kΩ unbalanced, 20 kΩ balanced

Input Clipping: 10 V rms (+22 dBu)

Cooling: Continuously variable speed fan, back-to-front air flow

Connectors, each channel:

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 and Ch. 2 gain knobs, 10-position DIP switch

Indicators:

PWR-ON: Green LED; SIGNAL: Green LED (1 per channel);

CLIP: Red LED (1 per channel)

Dimensions (HWD) inches: 5.25 x 19 x 15.9 / 3RU

Dimensions (HWD) mm: 133 x 483 x 400 / 3RU

Amplifier Protection: Full short circuit, open circuit, thermal, ultrasonic, and RF protection; Stable into reactive or mismatched loads

Power Requirements: 120 or 230 VAC, 50-60 Hz

Load Protection: On/off muting; Triac crowbar

QSC ISA1350 Professional Power Amplifier

Key Features

Description

Features:

Specifications:

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