I have the same issue. The thump I get isn't real loud so I'm not worried.

I can tell you that a line conditioner will probably NOT do anything. I tried a Monster PowerBar ($200) and it didn't do squat. It's a nice looking, quality power strip, but that's about it.

As I really don't want to run a new electrical line at this point, I'm just living with it.

I do wonder if the 'noise suppressors' they use for car audio would work here. I had a thump problem in my car that was completely eliminated by an RCA in-line suppressor ($20). I have no idea what or if this affects the signal quality. Good luck.

[This message has been edited by Slee_Stack (edited July 18, 2003).]