With all components powered up I have a buzz coming from both front and the middle speakers. The buzz does not react to volume changes and I don't hear it in the surrounds.
I was thinking that it was a problem in the amp (NAD T955) but Saturday I switched the receiver's (Onkyo 707) center spkr preout cable from the channel 3 input on the NAD to channel 5 input and the buzz followed to that spkr.
I then changed out the cable between the receiver's center out and the amp's channel 3 in ... no effect. Still had the buzz.
Sometimes the buzz is a bit lounder than other times, either way, it's p'n me off that I can't find the source.
Any and all help appreciated.