Awhile ago I posted about sending back my buzzing Behringer BX600 amp. I decided not to, because I think the buzzing is some kind of electronic problem, not a broken speaker or anything. I discovered that when I touch the side of the amp, the buzzing dissapears. When I take my hand away, it returns. It's not my bass, I plugged in a guitar and the buzzing was still there. My first thought is that this is some kind of grounding issue. But I'm not sure. Anyone know anything about this?