BOSS AUDIO P10DVC  Phantom 10 inch Dual Voice Coil (4 Ohm) 1800-watt Subwoofer One 10 " Woofer with Dual 4 ohm Aluminum Voice Coil 1800 Watts MAX 900 Watts RMS Power Handling 86dB Sensitivity, 44 Hz Resonant Frequency Electroplate Injection Cone and Rubber Surround Works in 1.8 CuFt Sealed or 1.5 CuFt Ported enclosure 3 Year Platinum Dealer Warranty 10-inch subwoofer with 1800 watts maximum power handling Poly injection cone Dual 4 ohm voice coils for wiring versatility Frequency Response: 25Hz - 1.5kHz Mounting Depth: 5 1/2 inches