Black Diamond DIA-CARBON18.1D18" High Excursion Subwoofer with Carbon Fiber Cone | 1-Ohm The DIA-CARBON18.1D delivers earth-shaking bass with 3500W RMS and a peak of 7000W. This 18-inch sub moves massive air for SPL competitions and serious audio enthusiasts. Lightweight Carbon FiberIts ultra-rigid carbon fiber cone and dust cap reduce distortion and improve responsiveness, delivering clear, tight lows even at extreme volumes. True High-Excursion DesignWith an impressive 22.5mm Xmax, the DIA-CAR
