Sound Storm SLP10 10 Inch, 800 Watt, Single 4 Ohm Voice Coil Car Subwoofer One 10" SubWoofer with Single 4 ohm 1.5" Copper Voice Coil 800 Watts MAX Power 400 Watts RMS Power 85dB Sensitivity, 41 Hz Resonant Frequency Polypropylene Cone and Rubber Surround Works in .5 CuFt Sealed enclosure 3 Year Platinum Dealer Warranty