Sound Storm SLR8DVC 8 Inch, 1000 Watt, Dual 4 Ohm Voice Coil Car Subwoofer One 8" SubWoofer with DUAL 4 ohm 1.5" Copper Voice Coil 1000 Watts MAX Power 500 Watts RMS Power 83dB Sensitivity, 44.8 Hz Resonant Frequency Custom Tooled High Efficiency Polypropylene Cone and Rubber Surround Works in .35 CuFt Sealed or .65 CuFt Ported enclosure 3 Year Platinum Dealer Warranty