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QSC designed the ISA 500Ti as a cost-effective solution specifically with sound contractors in mind. The ISA 500Ti can drive both eight and four ohm loads and a distributed system on the same channel at the same time, allowing you to reduce the number of amplifier channels needed to power the speakers from the same amp. This rugged power amp can output 25, 70, or 100 volt to accommodate distributed audio systems, making this the perfect power amp for countless installed in-ceiling systems. Add QSC sound quality to your system with the ISA 500Ti!

More Information


  • Low-impedance outputs plus isolated 25, 70, and 100 volt outputs for distributed audio systems
  • 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 (50 Hz or 75 Hz) protect speakers and prevent speaker transformer saturation, with minimal effect on program material
  • Front panel indicators include power, signal, and clip
  • 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

Technical Specification

Tech Specs

  • Number of Channels:2
  • Power Class:Class H
  • Watts/Side @ 8 ohms:260W
  • Watts/Side @ 4 ohms:425W
  • Watts/Side @ 2 ohms:700W
  • Watts Bridged:1400W @4 ohms
  • 70V/100V Output:500W per channel
  • Inputs:2 x XLR, 2 x Euroblock
  • Outputs:Barrier Strip
  • Cooling System:Automatic variable-speed fan for quiet normal operation with maximum cooling on demand
  • DSP:Yes
  • Filters:Yes
  • Rack Spaces:3U
  • Height:5.25"
  • Depth:15.9"
  • Width:19"
  • Weight:49 lbs.
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