Home > etcetera > QSC ISA500Ti Commercial Power Amplifier

QSC ISA500Ti Commercial Power Amplifier


Just yesterday, I installed one of these 70V line amplifiers in a customer’s place. It was a pretty straightforward install and I must say that the install went like a snap. I hooked this up to a few 70V line speakers and this amplifier powered them loud and clear. Only thing about this amplifier is that it is damn, bloody heavy. It should be with two huge toroidal transformers inside! I went to the QSC website to find out more about it and this is what I found out about it:

  • 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
  • 3-year warranty plus optional 3-year extended service contract

I connected this amplifier to the Euro connectors and I was mighty pleased with the outcome. The Euro connectors make installation a breeze with the screw-in terminals. Forget about soldering XLR connectors!

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