My system is about 12 years old, comprising of : Yamaha RXV800, Paradigm bookshelf speakers (Mini Monitor series for mains, Cinema v.1 for rears, PDR-10 subwoofer, and a Paradigm center channel - don't recall the model number but it goes with the system). It appears that the sub has seen better days. I get a "crackling" type sound coming from the front of the sub. I'd take the cover off, but I understand that it isn't meant to come off. Anyway, assuming that the sub is shot and not worth repairing (or can't be repaired), I'm looking for a replacement sub that will fit into the existing system and one that won't cost too much. And to be thoroughly honest, although I know the importance of the sub, I'm willing to get a lesser quality one as the system is used primarily for TV, DVDs, CDs. I like to listen to music, but really can't tell one note from another (i.e., don't need to go big on the sub.) Actually, I've been reading some reviews on the Polk PSW10 and think that it would make a nice replacement. Certainly would like to hear some comments. Thanks.