BOSS Audio P12SVC 1600 Watt, 12 Inch, Single 4 Ohm Voice Coil Car Subwoofer Sensitivity SPL (1W / 1m) 87 dB, Resonant Frequency 35 Hz Polypropylene Cone, 2 Inch Copper Voice Coil, Rubber Surround Sealed Enclosure Internal Volume: 1.4 Cubic Feet, Ported Enclosure Internal Volume: 1.9 Cubic Feet 4 Inch Round Inch Port Circumference, 12 Inch Port Length, 34 Hz Port Frequency 5.13 Inch Mounting Height, 11.1 Inch Mounting Hole Diameter Dimensions: Depth 12.2 x Width 12.2 x Height 5.6 3 Year Platinum Online Dealer Warranty