Sound Storm SLR12DVC 12 Inch, 2500 Watt, Dual 4 Ohm Voice Coil Car Subwoofer One 12" SubWoofer with DUAL 4 ohm 2" Copper Voice Coil 2500 Watts MAX Power 1250 Watts RMS Power 85dB Sensitivity, 36 Hz Resonant Frequency Custom Tooled High Efficiency Polypropylene Cone and Rubber Surround Works in 1 CuFt Sealed or 1.3 CuFt Ported enclosure 3 Year Platinum Dealer Warranty