Kicker CVR12 CompVR 12-Inch (300mm) Subwoofer, 4-Ohm DVC Bundle12 CompVR 4 Ohm The CompVR 12-Inch Subwoofer is a 4? Dual voice coil design, built for easy wiring. CompVR creates your bass using high-temp, dual voice coils.A ribbed Santoprene surround also gives the cone added strength under stress. The perimeter venting, SpiraleadT tinsel-lead technology, and spring-loaded push terminals are part of the high-performance engineering standards found on every KICKER woofer. The CompVR 12-Inch Subwoofer works best with a sealed or ported enclosure and 400 watts of recommended power.