one of my amps is a proamp: QSC GX5, and at full gain, there is a bit of noise IF one puts his ear near the speaker; when i lower the gain (sensitivity) by about 6 dB, then it's totally quiet.
My other amp, a Hafler 500 was a proamp; those sold for house use did not have any sensitivity pots, but the pro ones did. That was the only difference between the two.
one only has to check specs to see that they're as good quality as excellent home audio amps and, for the price, they're a bargain.
a plus is the fact that the standard warranty is 3 years, and if you register your new amp at QSC, you get a 3 year extension.
if you have a question about using the QSC amps, usually it's the chief engineer who answers you on their forum.
Last edited by J. B.; 01/04/12 10:20 PM.
