More from Amazon.com : http://www.amazon.com/gp/product/B007GC9YFM?tag=thefatkidin06-20 <br /> <br />Earthquake Sound FF10 10-Inch Front Firing Subwoofer <br /> <br />10-inch front-firing subwoofer <br />400-watt Class AB high-efficiency amplifier <br />Automatic signal detection circuitry <br />LED status indicators <br />12 dB Octave variable filter from 40 Hz to 180 Hz