Polk Audio PSW303 8-Inch 100-Watt Powered Subwoofer (Single, Black) A single powered subwoofer for use with stereo or home theater speaker systems Equipped with one magnetically shielded 8-inch long-throw woofer Frequency Response: 28Hz - 200Hz Peak power handling: 260 watts (100 watts continuous) Slot-load venting minimizes turbulence, noise, and distortion