47KBRW12 KICKER 12" Bass ReFLEX Passive Radiator

12" Bass ReFLEX™ Passive Radiator Get all the low-end performance of a ported enclosure in a fraction of the air space. Your Enclosure. Your Way. Now you have the freedom to create a custom box in the shape you want, in the color you want, with the materials you want. You’ll make a custom enclosure that fits under a seat, behind the back bench or in the trunk with ease! Your shape - our size. We custom weighted the KBRWs to exacting specifications, so you get the perfect tune. All it needs is the right active sub in the recommended airspace for some serious custom bump! 12-inch Box|34Hz For optimal results, use a 12-inch CompRT or CompVT subwoofer in 0.7 cubic feet of internal air space.