Bought this subwoofer off of ebay used for $95.00 It is a very small enclosed box. The Speaker is only 8" woofer with a 100 watt internal amp. Hooked it up to an older yamaha HTR 5940 6..1 channel with JBLs sat 20s for my fronts and smaller JBLs sat 160s for center and rears. Tried it with musics CDs mostly jazz and DVD movies, let me tell you this subwoofer is incredible!!!!! It is not going to shake walls, picture frames. rattle china cabinets. What it will do is give tight quality bass defintion that I've been search for. Incredible clean, quality, magnificient bass from an only 8" woofer. This so far the best subwoofer I had heard so far. It can do two things very well, give excellent musical bass and defintely that deep bass movie experience. Cudos for At.lantic Technology.