The CompVR 10 Inch Subwoofer is a 2O dual voice coil design, built for easy wiring. The CompVR gets earth shattering bass to you by engineering a stable base and a cool, powerful motor. Powerful magnets and dual high temp voice coils move a stiff polypropylene cone, while perimeter venting keeps the air moving around the motor. You get strong bass that keeps on bumping day in day out. The CompVR 10 Inch Subwoofer works best with a sealed or ported enclosure and 400 watts of recommended power.