Sometimes (it's totally random) I get static-like distortion on either one of my rear Onkyo hts650 speakers. This only seems to happen with DVDS. The wires leading to them are only 30 feet long and encased in Wiremold and I'm using an optical cable to connect my DVD player to my receiever. I tried watching a movie through my PC which is connected to my receiver via a coaxial cable, but the distortion eventually came through there as well (but dissapeared 10 seconds later). I'm pretty sure that the distortion only comes when either Dolby Digital or DTS is NOT being used (ie DVD menus screens). This happens only about 1 out of 10 times, but I'm worried it will get worse or damage my equipment. Everything is connected correctly and tightly so I'm suspecting either damaged speaker wires or a faulty receiver. Anyone have any idea what's going on and what I can do to fix it? Thanks in advance.