Orion XTRPRO124D 12" Dual 4 Ohm XTR Pro Series Car Subwoofer Power handling: peak: 1000 watts / RMS: 500 watts Polypropylene dust cap and paper cone is moisture and UV resistant Nitrile-butadiene rubber Surround enhances the linear excursion Symmetrical tuned long-throw Surround Dual interlaced conex Spider