When playing certain noises the sub has an iratating rattling sound loud enough to hear it from where i sit. it happens during certain lower bass noises like in the credits to the dark night movie. i just bought this sub so i dont know why it would have any problems like that. otherwise when not playing that specific tone the sub works great witrh bass heavy music and movies.

Audio Players & Recorders - Polk Audio - PSW505 Subwoofer