Cerwin-Vega CLSC-15S Classic Series 15-Inch 300-Watt Powered Subwoofer, Black Ash 300-watt powered subwoofer with black ash enclosure for deep, powerful bass response 15-inch high-excursion woofer with cast-aluminum frame and fiber-impregnated cellulose cone 25 to 150 Hz frequency response; continuously variable crossover from 40 to 150 Hz Includes speaker-level, line-level, and unfiltered LFE inputs; adjustable level control Auto on/off sensing; measures 18.75 x 23.5 x 18.75 inches (W x H x D); 5-year warranty