Onkyo SKW204 Bass Reflex Powered Subwoofer (Black)<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Measures 10-13/16 x 18-5/8 x 16-7/8 inches</li><li>Auto standby/on circuitry</li><li>Crossover control and a phase invert switch let you fine-tune the bass output</li><li>Powered subwoofer for your 5.1- or 7.1-channel surround sound system</li><li>230 watts of power; 10-inch cone</li><li>Powered subwoofer for your 5.1- or 7.1-channel surround sound system</li><li>Crossover control and a phase invert switch let you fine-tune the bass output</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41GYf6GvmkL.jpg" noproxy>