The sensational, square Kicker Solo-Baric L7 has changed the way car audio enthusiasts look at and hear bass! The S15L72 15" subwoofer generates mammoth bass with a titanium-deposit cone housed in a non-resonant aluminum basket. A patented Santoprene rubber surround exerts tight control over woofer excursion, while perimeter cooling keeps voice coils cool when the sub's working hard. Accuracy is maintained, even at the highest sound pressure levels.Here's why this sub runs "squares" around the competition. The woofer cone of the S15L72 is as much as 20 percent larger than 15" round subs more cone moves more air for more bass! Dual 2-ohm coil design allows you to wire the sub for 1-, 2-, or 4-ohm impedance, whichever works best with your system's compatible amplifier.