I installed my HTS20 (Infinify Home theater 4 SAT, 1 CTR, 150W Sub) two days ago. Love the sound. But - big problem with the sub. It performs w/o any problems, but causes extreme interference with all TV's in the house. Channel 3. The interference is white lines 1/2 to an inch apart. I moved the sub around, disconnected the sub cable (Monster Sub cable) and carried the sub around from outlet to outlet. Just plugging the sub in to the house electrial (anywhere) even w/o a receiver connection causes the interference. I have a 2 story, 5 year old home - no electrial problems. My system includes - TV - PANASONIC PT-51HX40 DVD - JVC XV-F85GD A/V Receiver - SONY STR-DE975 Cable - Atlantic Scienfic Digital Cable box Audio - Infinity HTS 20 I called Infinity. The Infinity tech looked into his DB and got one hit. He is shipping me 2 ferrite wraps to install over the elctrical cord on the sub. If that fails - the system is to be returned. I had 2 ferrite wraps that came with my camcorder and tried them last night. No help at all. I'm not sure if the Infinity wraps will be a different size so I guess I'll wait and see. What do you guys think?