ONKYO SKW-550 230W Subwoofer Nice and powerfull subwoofer in pristine condition. I am selling it because I got new Klipsch speakers, sadly it'll eed a new home. Impress yourself with the earth-shakingly realistic bass pumped out by this 230W subwoofer. A lot is packed into LFEs (Low Frequency Emissions), which you can find in more and more movies and music these days. Rest assured, you won't miss a thing with the SKW-550. Features like crossover control and a phase invert switch let you fine-tune the bass output from this subwoofer to match the wide variety of speakers on the market. Some more details: Max Output Power: 230 W Dynamic Speaker Type: Bass Reflex Woofer: 10” Cone Freq Response: 25–200 Hz Product Dimemnsions: 10-13/16" × 18-5/8" × [TL_HIDDEN] 28 mm) Product Weight: 26.0 lbs. (11.8 kg)