I recommend you disconnect ONE of your i/c's connected to one of your monoblocks. (I'm assuming the speakers are buzzing while everything is connected and on, but no music is playing). If the buzzing stops with one i/c disconnected, I think you have a grounding problem with your house wiring.
Help...Buzzzzzzing....!!!
I experience a slight buzz from my system which appears approx after 2 hours of operation. Could this be a tube problem. Ive tried ground cheater and that is not the case. I run tube gear...Counterpoint SA11 pre, LA Audio/Klimo mono amps...could a bad pre tube be the culprit? If so, why would it manifest after an hour of so? Any help would be obliged.