The PS-1000 may be a bandpass design, but in its Version 4 configuration it is a much tighter sub than the older PS-1000 versions. My best friend was not a fan of my version two PS-1000, calling it "in your face," but he was shocked at the improvement with my Version 4. He said it sounded tight and not at all boomy with music (although he still prefers my other sub, a Mirage BPS-150 bipolar unit with twin eight-inch woofers, for music. It cost me $300 more than the PS-1000v4 and isn't anywhere near as ballsy as the Paradigm in home theater mode. I spoke to the owner of a high-end home theater store, who carries subs costing thousands of bucks (Mark Levinson, MacIntosh, etc) He praised the PS-1000v4, which he also sells, for its amplifier quality, saying it has really come up from the previous versions. He said amplifier quality can make or break a sub. He also noted the PS-1000v4 driver is stiffer and has a longer throw than the older versions. The dealer said nothing he carries in that price range can touch it for overall performance. Maybe there are better brands (SVS+HSU I am guessing) but I am totally impressed with my PS-1000v4 and won't be getting rid of it anytime soon. I wish Paradigm had totally changed the model number, because people are going to continue to tar the PS-1000 with the "boomy, indistinct" brush as a result of their impressions of earlier versions.