(2) Skar Audio DDX-15 D4 15" 1500W Max Power Dual 4 Car Subwoofer Sold as a Package - Includes 2 DDX-15 D4 15-inch Dual 4-ohm car subwoofer Peak Power : 1500 Watts RMS Power : 1000 Watts 2.5" High Temperature Copper Voice Coil Competition Grade Pressed Paper Cone with Stitched High Roll Foam Surround