(2) Skar Audio IX-8 D4 8" 300W Max Power Dual 4 Subwoofer Sold as a Package - Includes 2 IX-8 D4 8-Inch Dual 4 Ohm Component Subwoofers Peak Power : 300 Watts RMS Power : 150 Watts 2" BASV High Temperature Copper Voice Coil Advanced Air Flow Cooling System