I've got a major problem here people. While playing a game today I heard the worst buzz coming from my HK AVR320. What is really driving me crazy is that this is the second amp that has done this. So now I believe that my circuitry is wrong. Here's a list of my equipment: Toshiba 55HX70 Toshiba 3750 dvd HK AVR 320 Samsung LD Sony PS2 Starchoice Satellite Velodyne ct100 NHT 1.5 (front) NHT Super Center NHT Super One (rear) Can anyone suggest a course of action? I don't want to have to switch another AVR 320 for nothing. Do I have a grounding problem somewhere? If I do what do I do next? Somebody please help me salvage my hometheater...I really don't feel like disconnecting the entire setup as I just placed the whole thing in a fancy wall unit . Any help would be greatly appreciated.