Hey guys, I've gotten the electrical buzz in my system down to a manageable level. Now you have to put your ear up to the speaker to hear the noise. At first it was putting a cheater plug on my Behringer amp that decreased the volume of the buzz. But the really annoying thing is that now the buzz is just constant and doesn't seem to be affected by anything I try. I had an electrician over at the house this morning and he said that the grounds are all fine. He checked the main breaker box and replaced one of the breakers that he said was a little loose but he didn't find anything wrong with the electrical. He also told me that the screw that I had used to ground the cheater plug to the socket wasn't doing anything. I guess the screw didn't actually attach to anything metal in the outlet or something. This makes sense because when I previously tried attaching a ground wire from the back of the Marantz to the outlet, it didn't help. One thing the electrician suggested I try was some sort of donut shaped magnet that he said you put your speaker wires through. He said that this would get rid of the buzz but he couldn't think of what it was called. He said it runs about $20. Would any of you know what this thing is?