Yamaha Corporation of America SW315 Subwoofer System - Black Ash Physical Characteristics-Weight (Approximate)-41.89 lb YAMAHA 10" SUBWOOFER 270 WATT AMP. Frequency Response : 20 - 160 Hz (-10 dB) Yamaha YST-SW315 Subwoofer System - Black Ash 10-inch driver with high-efficiency, 250-watt PWM digital amplifier Advanced YST ensures that the speaker and amplifier work together to create perfectly linear speaker motion BASS (Bass Action Selector Switch) tailors the sub's output for video or music at the touch of a switch Yamaha's QD-Bass technology radiates bass in all directions for greater impact. Frequency Response : 20 - 160 Hz (-10 dB) Measures 13.75 x 17 x 15.1 inches (W x H x D)