Hi, I don't know where to post this, so sorry if it's in the wrong nook. I bought a new arcam avr recently and it buzzed very noticeable, even audible across the room, so I sent it back. The dealer tested his other 3 for me and said they all buzzed. I didn't have the wits to have tested in in another location to see if it might be my electricity (didn't know about that issue then). So I don't know if we both just have dirty electrics causing the buzzing or if it's the arcams. Soo... just this morn I got the notion to just get a device to clean up any potential dirty electrics and settle the matter, so I can just buy anything without worrying about that. Clever me. Does anyone know anything about which devices work best? I'm looking at some tripp lite isolation transformers and ups devices. There's two cheap tripp lite pro ups' for sale here, but I don't know if their cleaning ability is up to par, as they're more for power backup primarily. I don't want to spend a fortune. Thanks for any advice.