Yamaha YST-FSW100 Slim 130 Watt Powered Subwoofer (Black) Powerful 16cm (6.5") multi-range driver with magnetic shielding. Half Pipe port for minimizing extraneous noise. Slim Design is only 6-3/16" (15.7cm) Deep to Match Plasma Displays and Flat TVs Advanced YST II (Yamaha Active Servo Technology) for deep, powerful bass Peak power handling: 130 watts Frequency Response: 30Hz - 200Hz