Well, I need a new sub. The room is my computer room, which is about 15x12 feet (4.5x3.7 meters for you Brits, I'm in the US ) or thereabouts...maybe a little larger. It's full of stuff, so the sound dissipates well, just one wall that's really bare. I use it for gaming and music, next to no movies here. Anyway, I'm strongly considering getting the JBL S120PII. I'm looking for something really powerful, but of course with clean sounding bass. I'm not too picky; I'm looking more for loudness than quality right now. The S120PII seems to be a good choice because of nice power output, fairly large enclosure, and a nice driver too. The JBL floorstanders from the Northridge series put out very clean bass, so I presume this sub should do the same. I'm not that picky about it either way. However in the same price range I found the Velodyne SPL800II. I know Velodyne is known for making really nice sounding subs, but I don't know how loud this thing is. The 1000W RMS amp it sports is mindblowing; I have no Idea how they fit that in there. But I just don't know if the tiny enclosure and driver can make the same boom as the big honkin' JBL. Also it's a sealed enclosure, which is great for quality, but not for loudness. That 1000W just seems promising. I managed to get a hold of a technical review of the Velodyne...I couldn't find one of the JBL; I only found the BS ones that you find on like Amazon or wherever. Anyway, the review on the Velodyne said it managed to get 108dB @65Hz, which I find impressive. I don't have any question that I'll like the JBL, it's a classic big, heavy sub, but I'm wondering if the Velodyne is going to be louder. Does anybody own one? Or possibly, does anyone have an alternative for less than $400 shipped?