Lanzar OPTI1522D 15-Inch High-Performance Dual 2 Ohm Subwoofer DVC, Set of 1 15" Dual Voice Coil 2 Ohm Woofer - Custom Tooled Die-Cast Aluminum Basket Super Stiff Treated Pulp Ultra-Lite Cone - Massive High Density Foam Surround 4" High Temperature Dual Voice Coil - 160 Oz x 2 High Density Barium Ferrite Magnet Power Handling: 1800 Watts RMS / 3600 Watts Peak - Frequency Response: 28-800 Hz Efficiency: 90dB - Overall Diameter: 16-1/8" - Cutout Diameter: 14.0" - Mounting Depth: 8-3/4"