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QSC ISA Series Amplifiers

SKU: ISA Series MPN: ISA Series

The QSC ISA Series are designed as a cost-effective solution specifically for sound contractors.

The ISA Series features six models including three low impedance models (ISA 280, ISA 450, ISA 750) rated for 2-ohm operation, and three "T" versions with 25, 70 and 100 volt outputs for distributed audio systems (ISA 300T, ISA 500T, ISA 800T). Versatile loading options and a comprehensive feature set make the ISA Series a rugged, cost-effective power solution for any permanently installed sound system.

Housed in a rugged 3-U chassis, all six models feature rear panel gain controls for tamper resistant operation with 2 dB detents for quick and repeatable settings. Inputs include both XLR and detachable Euro-style connectors. Outputs feature covered barrier strip connectors for safety agency compliance, and for added versatility, a DataPort V2 (Version 2) terminated with an HD-15 connector is provided for use with DPV2-compatible signal processing accessories such as the XC-3 Crossover, SF-3 Subwoofer Filter, LF-3 Low Frequency Filter and the DSP-3 with external power supply.

QSC ISA Series Amplifiers Features Inlcude:

  • Three models for low-impedance applications
  • Three "T" versions include low-impedance and 25-, 70-, and 100-volt outputs for distributed audio systems
  • Rear panel gain controls for tamper resistant operation with 2-dB detents 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 (with external power supply)
  • Independent defeatable clip limiters for reduced distortion
  • Selectable high-pass filters that protect speakers and prevent speaker transformer saturation with minimal effect on program material (30 Hz or 70 Hz on non-"T" models, 50 Hz or 75 Hz on "T" models)
  • Class H complementary bipolar output circuitry reduces AC power draw and waste heat by 40% (ISA 750 and 800T)
  • Front panel indicators include power, signal, and clip
  • Covered barrier strip output connectors for safety agency compliance
  • Automatic variable-speed fan for quiet normal operation with maximum cooling on demand
  • Rear-to-front air flow keeps 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

"T" Models

  • 25-, 70-, 100-volt, and low-impedance outputs available simultaneously
  • Simple barrier strip connection determines output mode

QSC ISA Series Specifications (PDF 143KB)

Watts per channel

ISA280 185@8ohms, 280@4ohms, 430@2ohms

ISA450 260@8ohms, 425@4ohms, 700@2ohms

ISA750 450@8ohms, 650@4ohms, 1200@2ohms

ISA1350 - 1500@70V, 800@ 8ohms, 1300@4ohms, 2000@2ohms

ISA300Ti - 300@70V, 185@8ohms, 280@4ohms, 430@2ohms

ISA500Ti - 500@70V, 260@8ohms, 425@4ohms, 700@2ohms

ISA800Ti - 800@70V, 450@8ohms, 650@4ohms, 1200@2ohms

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