I have a terrible radio signal coming from my rear channel speakers (that I think is called RFI). It has been basically impossible to get rid of this noise. I have a great system (NAD receiver, JM Lab speakers), so it's very, very doubtful it's the equipment. Here's my question ... my rear speaker cable runs right along side the cable for the cable T.V. Could this be the problem? Should I try to separate the cables? Any other thoughts? Do "power conditioners" help? If so, which ones? Monster? Thanks!!!