Okay--Here's a problem for some creative electrical engineering types out there. Please forgive the length of the post.
I have an Acurus Pre-Amp, and Amplifier combination for my home theater set-up. It sounds great, BUT when I plug the amplifier into the outlet closest to the equipment, I get a fairly loud buzzing sound through the speakers. My first line of attack was to get a Monster Cable Surge Protector/Line conditioner, but that did not eliminate the buzz. I can plug the amp into an outlet on the other side of the room with a big extension cord, and there is no buzz then. The outlet that I want to use was originally on the same circuit breaker as the overhead lights, which have a dimmer switch attached, and when I dimmed the lights up and down, the buzzing changed, so then I thought that maybe the dimmer was the culprit. However, I can turn the lights off completely and the buzzing is still there. Still, I figured, to be safe, why not run a dedicated line for the home theater equipment directly to my electrical panel--that should cure it--or so I thought. I had my electrician wire the outlet directly to it's own dedicated breaker on the panel, but the buzzing is STILL THERE. Also, dimming the lights will still change the sound of the buzz, even though the lights are on a different circuit now. It can't be the lights, though, causing the buzz, because I can turn off the breaker to the lights and the buzzing is STILL THERE.
Now, I was fiddling with plugging in the amp to different outlets and here's where it gets really screwy-- The outlet I have been using (with a nice orange extension cord across the room) has four receptacles. If I plug the amp into either of the two left receptacles, no buzz. If I plug the amp ALONE into either of the two right receptacles, then there is a buzz. BUT, if I plug the amp and my television into the two right receptacles (or both into one of the right receptacles through a surge protector) then no buzz. This last bit seems to make NO sense to me, but I am no electrical engineer, just a guy who knows enough about wiring to be dangerous.
Any thoughts out there?