Kicker 51CWQ154 CompQ Series 15" subwoofer with dual 4-ohm voice coils powersports employing their High Amplitude Multi-Roll

employing their High Amplitude Multi-Roll (HAMR) surround technology

With expert image tuning mastery acquired over nearly two decades

giving you the biggest bass possible from such a shallow subwoofer

6-3/4" parabolic polypropylene woofer with rubber surround

Alpine S2-SB12 owner's manual

Kicker 51CWQ154 CompQ Series 15" subwoofer with dual 4-ohm voice coils powersports employing their High Amplitude Multi-RollProduct info: 15" subwoofer with dual 4 ohm voice coils SoloKon polypropylene cone with Santoprene rubber surround cast aluminum basket power handling: 1200 watts RMS sensitivity: 88 dB frequency response: 18 100 Hz mounting depth: 8. 9375" cutout diameter: 13. 875" sealed box volume: 1. 5 6. 0 cubic feet ported box volume: 3. 0 6. 0 cu. ft. grille not included warranty: 3 years