Kenwood P-W612 Two 12-Inch Subwoofers and Stereo/Bridgeable Power Amplifier Includes Two 12-Inch Subwoofers and Stereo/Bridgeable Power Amplifier Subwoofers; 400W Max Product Dimensions: 19.8 x 18.7 x 15 inches ; 15 pounds Polypropylene Cone High-Roll Urethane Surround