The KICKER® CompVR® Subwoofer gives you incredible bang for the buck. Emphasis on bang! 12" CompVR 4 Ohm The CompVR 12-Inch Subwoofer is a 4Ω 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, Spiralead™ 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. See below for more details. Specifications SIZE [in, cm]: 12, 30 IMPEDANCE [Ohms]: 4 DVC POWER WATTS [peak/RMS]: 800/400 SENSITIVITY [dB 1w/1m]: 86.9 MOUNTING DEPTH [in, cm]: 6-1/4, 15.9 MOUNTING DIAMETER [in, cm]: 11, 27.8 MIN SEALED BOX VOL [cu. ft, L]: 1, 28.3 MAX SEALED BOX VOL [cu. ft, L]: 4.6, 130 MIN VENTED BOX VOL [cu. ft, L]: 1.75, 49.6 MAX VENTED BOX VOL [cu. ft, L]: 2.25, 63.7