Lanzar OPTSW15D OPTI SCION 15-Inch 1000 Watt High Power Dual Voice Coil Subwoofer Black Polypropylene Cone - Dual 2'' High Temperature Kapton Voice Coil - Frequency Response: 25HZ-1.5KHZ Suspension Foam Surround - 80 oz. Magnet Structure - Mounting Depth: 6.85'' Stamped Steel Basket w/Nickel Input Terminal - 1000 Watts Peak Power - Overall Diameter: 15.35'' Bumped & Vented Motor Structure - Dual 4 Ohms Nom. Impedance Special Designed Plastic Magnet Cover - SPL: 89dB