Yamaha Corporation of America SW315 Subwoofer System - Black Ash<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Physical Characteristics-Weight (Approximate)-41.89 lb.;</li><li>YAMAHA 10" SUBWOOFER 270 WATT AMP</li><li>Yamaha YST-SW315 Subwoofer System - Black Ash</li><li>10-inch driver with high-efficiency， 250-watt PWM digital amplifier</li><li>Advanced YST ensures that the speaker and amplifier work together to create perfectly linear speaker motion</li><li>BASS (Bass Action Selector Switch) tailors the sub's output for video or music at the touch of a switch</li><li>Yamaha's QD-Bass technology radiates bass in all directions for greater impact</li><li>Measures 13.75 x 17 x 15.1 inches (W x H x D)</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41AM60ANS8L.jpg" noproxy>