Kicker L7R-10 10" DVC Square Subwoofer 4 OhmL7R Subwoofer technology continues to maintain the title as the first and foremost authority on bass. It was the world’s first patented square subwoofer, supplying the extra decibels needed for deep, musical bass in a mobile audio system.
The cutting-edge, square-sub design ultimately means more cone area, more air displacement and more decibels than a conventional round woofer. With a patented corner-ribbed, stitched Santoprene® surround helping to hold the massive motor structure in place, the L7R provides durability at high excursion without compromising sound quality.
Kicker's L7R features a highly-engineered motor structure that handles huge power and provides extreme output. With heavy-duty, ribbon tinsel leads intertwined with semi-progressive spider technology, the square sub promises dependability when pushed to the limit.
L7R subwoofers revolve around KICKER’s most advanced cone design, the injection-molded SoloKon™, which adds targeted strength for reliable performance and accurate response. The 360°, constant-contact back bracing adheres directly to every contour of the SoloKon square cone.
Venting in SoloKon’s back-bracing and along the perimeter of the spider landing provides maximum air-flow to cool the voice coils during operation. The woofer utilizes a high-mass, extended pole piece to aid in heat dissipation. The 10" L7R subwoofer conducts business in sealed enclosures from 0.66 to 1 cubic foot, and ported enclosures from 1.25 to 2.25 cubic feet.
Kicker L7R-10 User's Manual 
California Prop 65