STILLWATER DESIGNS 11S15L72 15 in. Dual 2ohm Solo-Baric L7 Series Car Subwoofer The newest square masterpiece is relentless, delivering more decibels with the patented extra cone area As a Solo-Baric subwoofer, it uses KICKER's most innovative concepts and technology One-piece SoloKon with full back bracing for toughness and zero distortion Reliable stitched surround for minimizing cone flex Heat-dissipating, solid pole piece and high-temp coil wire for longer woofer life