Polk Audio PSW404 10-Inch 200-Watt Powered Subwoofer (Single, Black) A single powered subwoofer for use with stereo or home theater speaker systems Equipped with one magnetically shielded 10-inch long-throw woofer Frequency Response: 25Hz - 200Hz Peak power handling: 375 watts (200 watts continuous) Slot-load venting minimizes turbulence, noise, and distortion