Originally Posted by mccobra
just got a Rotel RMB 1095. sounds amazing with my polk rti A9s when watching a movie or listening to CDs. When i have nothing playing i can hear a slight buzzing sound from my speakers.. all 5 channels. it does get worse when i turn on all my lights and does not completely go away when i turn them all off. just curious as to what is causing this annoying buzz. any help greatly appreciated
Ground loop ?
Try disconnecting and connecting equipment one piece at a time to see which piece of equipment is causing the hum..
Try a different electrical socket other than the one the lights run off of.
If you don't know whats running on what turn everything off in the house than go to electrical panel and turn off one breaker at a time to see what can't be turned on (No Power).
That is how I found out whats running on what.Mark everything down for future reference.
Simple explanation here and how to troubleshoot.http://www.psaudio.com/ps/wiki/Hum/