power amp

  1. B

    Ground Signal in Rack

    Hello there. I've been, over time, re-wiring/re-patching our sound rack. One thing I have run into, is there is a ground signal all the time coming out of our loudspeaker arrays. The ground loop starts in the rack. There isn't any problem with inputs into the mixer, or anything going out of the...
  2. JD

    Older QSC Power amp fix. (Random Muting)

    Just thought I would pass this along. Applies to the 1100, 1200, 1400, 1700 older QSC amps that may randomly mute for a few second to a minute.Had a 1200 that was driving me nuts as it took about a half hour to start doing it. Turns out that QSC uses an LED soldered in the middle of the pcb...