Kicker 43CWRT81 - 8" CompRT 1 Ohm - CompRT8 8-Inch (20cm) Subwoofer, DVC, 1-Ohm, 300W. The only thing thin about the CompRT® Subwoofer is the mounting depth. Whether it’s on the road, sand or trail, these tough subs work perfectly in nearly anything with a motor. 8" CompRT 1 Ohm The CompRT Eight-Inch Subwoofer is an all-weather thin subwoofer with a pair of 1Ω voice coils. To be a truly motorcycle/ATV friendly subwoofer, the sub must be able to take the rain, snow and sun – and keep on playing A UV-resistant cone and surround help make the CopmpRT sound great where the road (or trail) take you. The CompRT Eight-Inch Subwoofer works best with a sealed or ported enclosure and 300 watts of recommended power. Amp RMS Specifications SIZE [in, cm]: 8, 20 IMPEDANCE [Ohms]: 1 DVC POWER WATTS [peak/RMS]: 600/300 SENSITIVITY [dB 1w/1m]: 81.8 MOUNTING DEPTH [in, cm]: 2-11/16, 6.7 MOUNTING DIAMETER [in, cm]: 7, 17.7 MIN SEALED BOX VOL [cu. ft, L]: 0.2, 5.66 MAX SEALED BOX VOL [cu. ft, L]: 1.0, 28.32 MIN VENTED BOX VOL [cu. ft, L]: 0.8, 22.7 MAX VENTED BOX VOL [cu. ft, L]: 1.2, 34 *Assumes typical music program with minimal amplifier clipping; varies with enclosure size. See your KICKER dealer for details. **Port Volume Excluded. Due to continual developement, product, and specifications are subject to change without notice. Stillwater Designs and it's agents are not responsible for typographical errors.