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Power amp do-it-yourself!

Discussion in 'Amps and Cabs [BG]' started by Davidoc, Jul 2, 2002.


  1. I have this QSC USA-850 poweramp that I blew by bridging without the bridge switch on. There was heavy clipping on both channels, and the sound was a low volumed distortion. Next time I turned it on, nothing worked.

    Now when I turn it on, I hear a bzz that lasts a second, after the amps been on for a few seconds, then nothing. Both channels, or bridged.

    I wouldn't be surprised if it costs more to service it than to get a new one.

    I'm gonna do it myself and save a few hundred dollars!

    I have schematics off the QSC webpage.

    Is it just two blown transformers that need replacing?

    Do rubber gloves seem like a good idea? (there's alotta voltage in there)

    Am I doing something stoopid? Thanks!
     
  2. Thanks for the advice. But are you sure that it only has one transformer-- there are two internal amps...