DESC: 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-204. 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.