Back for 2009 is the rejuvenated of Rubicon subwoofers! Modernized with today’s technologies, the Rubies awesome cosmetics are only a cool shell for the good stuff inside. Molded polypropylene/mica cones yield the structural integrity required for woofers of this caliber. Convoluted NBR rubber surrounds yield superior strength and reliability. The dual voice coils are wound around Kapton formers for strength and sufficient cooling. If you loved the old-school Rubicon wooders, the new Rubies will blow you away with their vast improvements..