Skar Audio IX-10 D4 10" 400 Watt Max Power Dual 4 Ohm Car Subwoofer 10-inch Dual 4 Ohm Voice Coil Subwoofer Max power: 400 watts RMS Power: 200 Watts 2" High Temperature Copper Voice Coil High Strength Pressed Paper Cone - Spl: 84.4 dB