I got to agree with SLL ... I thought I had a hum problem when I first got my 950...then I turned my cheap halogen lamp to the bright setting (to check out the back of the system) and the hum went away. Quite distrubing to know that something plugged into an outlet across the room can affect your system that way (I even have a Monster HT2500 power filter/suppressor!) and it was just the darn dimmer switch on a $20 ($15US...damn exchange rate) lamp.

BTW...love my Blue-dot unit