Polk Audio PSW125 12-Inch Powered Subwoofer (Single， Black)<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>12" Composite Bass Driver Delivers Deep， Powerful Bass</li><li>150w Continuous/300w Dynamic Power Amp</li><li>Slot-loaded Vent Improves Bass Response With Lower Distortion</li><li>Line Level &amp; Speaker Level Inputs</li><li>Auto On/off Saves Energy When Not In Use</li><li>A single 12-inch subwoofer with compression circuitry to limit distortion at earth-shaking volume levels</li><li>Equipped with one 12-inch dynamic balance composite woofer driver</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51kQYmIGVML.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51kp5f1eqWL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51J2SNdnEvL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41oKQUCsYyL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/512YFAlaQpL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41%2BibQserRL.jpg" noproxy>