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QSC ISA1350 2-Channel 1500W 70V Power Amplifier
QSC ISA1350 2-Channel 1500W 70V Power Amplifier

QSC ISA1350 2-Channel 1500W 70V Power Amplifier

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SoundPro Item: 16950
MPN: ISA1350
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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.

QSC ISA1350 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
  • QSC ISA1350 2-Channel 1500W 70V Power Amplifier1
  • Three Year Warranty plus optional 3-year extended service contract1
  • OUTPUT POWER PER CHANNEL, STEREO MODE, both channels driven
    • 8Ω, 20 Hz–20 kHz 0.1% THD: 800W
    • 4Ω, 20 Hz–20 kHz 0.1% THD: 1300W
    • 2Ω 1 kHz 1% THD: 2000W
    • 8Ω, 1 kHz 0.1% THD: 2800W
    • 4Ω 1 kHz 1% THD: 4000W
  • Signal to Noise (20 Hz-20 kHz)100dB
  • Distortion (SMPTE-IM)Less than 0.01%
  • Input Sensitivity @ 8 ohms1.24V (+4.1 dBu)
  • Maximum Voltage Gain64.0× (36.1 dB)
  • Output CircuitryClass H, 3 tier
  • THX ApprovedYes
  • Weight - Net68 lb (30.8 kg)
  • Weight - Shipping77 lb (34.4 kg)
  • Distortion (Typical) 20 Hz–20 kHz: 10 dB below rated powerLess than 0.03% THD, 4 ohms and 8 ohms
  • 1.0 kHz and below: full rated powerLess than 0.03% THD, 4 ohms and 8 ohms
  • Frequency Response 10 dB below rated output powerISA 280, 450, 750 and 1350: 20 Hz–20 kHz, +0/-1 dB; -3 dB points: 5 Hz and 50 kHz
  • Damping Factor with 8Ω Load (direct outputs)Greater than 200; ISA 1350 greater than 250
  • Output Regulation (isolated outputs)Less than 1.5 dB
  • Input Impedance10 kΩ unbalanced, 20 kΩ balanced
  • Input Clipping10 V rms (+22 dBu)
  • CoolingContinuously 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) inches5.25 x 19 x 15.9 / 3RU
  • Dimensions (HWD) mm133 x 483 x 400 / 3RU
  • Amplifier Protection
    • Full short circuit, open circuit, thermal, ultrasonic, and RF protection;
    • Stable into reactive or mismatched loads
  • Power Requirements120 or 230 VAC, 50–60 Hz
  • Load ProtectionOn/off muting; Triac crowbar: ISA 750, 1350, and 800Ti; AC coupling: ISA 280, 300Ti, 450, and 500Ti

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