12" CompR 4 Ohm The CompR 12-inch subwoofer has a dual 4? voice coil design, making it easy to get the most out of your amplifier. Revolutionary SoloKon technology joins the cone to the vented rear bracket, creating a single unit integrated that cools the motor and eliminates distortion. The CompR 12-inch subwoofer works best with a sealed or ported enclosure and 500 watts of recommended power. See below for details SIZE [in, cm]: 12, 30 IMPEDANCE. [Ohms]: 4 Watts DVC Power [peak/RMS]: 1000/500 SENSITIVITY [dB 1w/1 meter]: 86.9 Mounting Depth [in, cm]: 5-3/4, 14.6 MOUNTING DIAMETER [in, cm]: 111, 27.9 SEALED BOX MIN VOL [cu. ft, L]: 1.0, 28.3 MAX SEALED BOX VOL [cu. ft, L]: 2.0, 56.64 MIN SEALED BOX VOL [cu. ft, L]: 1.75, 49.6 MAX BOX VOL [cu. ft., L]: 2.25, 63.7