(2) Skar Audio IX-10 D4 10" 400W Max Power Dual 4 Subwoofer Sold as a Package - Includes 2 IX-10 D4 10-Inch Dual 4 Ohm Component Subwoofers Peak Power : 400 Watts RMS Power : 200 Watts 2" BASV High Temperature Copper Voice Coil Advanced Air Flow Cooling System