PowerBass XL-104D XL Series 10-Inch Dual 4 Ohm XL Series Car Subwoofer - Set of 1 10 inch Xtreme XL Series Dual 4 ohm Subwoofer Power Handling: Peak: 700 watts RMS: 350 watts Impedance: Dual 4 ohm 4-Layer, non-pressed paper cone with Dynamic Damping Coating (DDC) finish High-roll Santoprene surround