I recently bought a plasma and thought it was buzzing. However, after some close listening and experimenting, I realize the buzz is coming from my Parasound HCA-1200ii amplifier. The strange thing is, it only happens when both the amp and the plasma are on at the same time. Listening to music with the plasma off it's silent; plasma on and amp off, no problem. I have everything plugged into an old Monster Power line conditioner.
Any ideas what is causing the problem and how to fix it? Thanks.
NHT speakers, Denon 4520, 65VT50