Hi all. I recently got a refurbished Panasonic SA-HE200 receiver and I'm having some problems. When I put on a dvd, it sounds great for the first hour or so, but then the front speakers start crackling and popping and the dialogue becomes choppy. My front speakers are Bose 201 Series IIIs (They're 10 years old and I got them long before I learned Bose was not the way to go). My center speaker is a Sony SS-CN305 and my back speakers are Sony SS-SR305s. I did not have this problem with my old receiver, a Technics SA-GX350. Could it be that my old speaker wires can't handle the new power? Or that my front speakers can't handle it? Or is the receiver defective? I'd appreciate any help you can give me. Thanks so much.