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The ISA-450 Commercial Power Amplifier from QSC is a 3-RU rackmount power amplifier designed specifically for sound contractors. It can be used as a low-impedance solution rated for 2-Ohm operation at 700W per side, or 8-Ohm operation at 260W per side. The versatile loading options, feature set, and protection circuitry, in addition to the built-in HD-15 DataPort V2 DSP interface capability, ensures a high-value, cost-effective solution for budget-minded installations.

The ISA-450 is housed in a rugged all-metal chassis that features rear-panel gain controls for tamper-resistant operation and 2 dB detents for quick and repeatable settings. The inputs include both XLR and detachable Euro-style connectors, and the outputs feature covered barrier-strip connectors for full safety agency compliance.

More Information

QSC ISA450 425W 2-channel Power Amplifier Features:
  • Stereo, bridge, and parallel operating modes
  • Rear-panel gain controls safeguard against tampering
  • 2dB detents on gain controls provide easy repeatability
  • Front-panel power, signal, and clip LEDs make keeping an eye on your levels simple
  • Independent clip limiters minimize unwanted distortion
  • Selectable highpass filters protect your system from speaker transformer saturation
  • Comprehensive DC, infrasonic, thermal overload, and short circuit protection circuitry
  • XLR and detachable Euro-style input connectors
  • Covered barrier strip output connectors comply with safety agency regulations
  • Automatic on-demand variable-speed fan and rear-to-front airflow ensure cool operation
  • DataPort V2 for use with DPV2-compatible accessories and DSP-3 and DSP-4 processors

Technical Specification

Tech Specs

  • Number of Channels:2
  • Power Class:Class AB
  • Watts/Side @ 8 ohms:260W
  • Watts/Side @ 4 ohms:425W
  • Watts/Side @ 2 ohms:700W
  • Watts Bridged:900W @ 8 ohms, 1400W @ 4 ohms
  • Inputs:2 x XLR, 2 x 3-pin Euroblock
  • Outputs:1 x Barrier Strip
  • Data I/O:DataPort V2 (DSP control)
  • Cooling System:Variable Speed Fan
  • Filters:Yes
  • Frequency Response:20Hz-20kHz
  • THD:<0.03%
  • Overload Protection:Full short circuit, open circuit, thermal, ultrasonic, RF protection
  • Rack Spaces:3U
  • Power Source:Standard IEC AC plug
  • Height:5.25"
  • Depth:15.9"
  • Width:19"
  • Weight:42 lbs.
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