I have the sb 4000 now and absolutely love it for music , and movies also trading up to the pb4000 is still an option for me for a few more weeks with svs I was wondering for those of you that have heard both, and mostly, heard alot of music played thru the pb4000, will i SVS boasts an astonishing / 3 dB window of 13 Hz to 0 Hz for the PB4000 and 15 Hz to 0 Hz for the PC4000 These frequencies are below what is commonly thought of as audible sound;The SVS PC4000 has no downside It's all good And at $1,799, it fills a niche that no other subwoofer covers Should you want/need a pair, the price drops to $1,600 for the second one – a nice touch If you need bass, and floor space is at a premium, the SVS PC4000 is the way to go The SVS PC4000 Subwoofer wwwsvsoundcom Svs Dual Pb 4000 Subwoofer Audio Advice Svs pc-4000 vs pb-4000