I have a Pioneer DSX-D411, and I'm not sure I have it set up correctly. I've read the manual several times, and it sheds no light on the problem. I have two Infinity front speakers, two Sony surrounds, and a Sony center. There is no sub. I have it set to 5.0 sound. The speakers are pretty old. When the volume is turned up, the speakers crackle. Even when the volume is low, it doesn't sound right. My brother says that the problem is that the bass is routed to the woofer, instead of the subwoofer. He says that the receiver is at fault, and that our 10-year old receiver that I replaced was better. If anyone has this receiver, and knows how to properly set it up, I'd be greatful for your assistance. The other thing is, there is a tear in the subwoofer on the left speaker. Would it be possible to fix that?