Kicker CompRT 6.75" 1-Ohm Subwoofer 6.75" 300W DVC 1-Ohm Car Subwoofer. Size [in, cm]: 6-1/2, 16.5. Impedance [Ohms]: 1 DVC. 300 Watts Peak. 150 Watts RMS. Injection-molded polypropylene cone Tough Santoprene surround with interlocking front gasket. Pair of wire terminals custom designed for shallow mount installations. Weather-proof for outdoor powersports applications. Double venting for max cooling. High-temp voice coil for increased power handling Sensitivity [dB 1w/1m]: 82.6. Mounting Depth [in, cm]: 2-3/4, 7. Mounting Diameter [in, cm]: 5-5/8, 14.3. Min Sealed Box Vol [cu. ft, L]: 0.18, 5.1 The CompRT 6-3/4-Inch Subwoofer is an all-weather thin sub with a pair of 1 Ohm voice coils. A tough exterior is just the start of this slim mount subwoofer. With a mounting depth under three inches and plenty of power handling, this go-anywhere sub is as flexible as it is powerful. The CompRT 6-3/4-Inch Subwoofer works best with a sealed enclosure and 150 watts of recommended power.