I have a problem with a buzzing sound coming from my speakers. I have a Sunfire Theater Grand I with a Sunfire Cinema Grand Amp. The buzz is present when both are turned on but stops when I turn off the Theater Grand. Everything is plugged into a Monster Power 3500 power center. I also noticed that when I turn on the pink noise to calibrate speakers the buzzing stops. My speakers are all Paradigm. I also tried disconnecting cable to the tv thinking it might be ground loop but no luck.