RE Audio XX12D4 12-Inch Composite Cone with Dual 4 Ohm Performance Woofer Dual Composite 2-piece Cone, Ultra Rubber Surround Cast Aluminum Gasket, Cast Aluminum Basket, Tork-Tite Terminal 3" 8-layer Aluminum Flat Wire Voice Coil, FEA-optimized Motor Structure, Vented Magnet System Dual Progressive Spiders, Integrated Tinsel Lead Nominal Impedance: Dual 4 Ohm, Power Handling: 1500 W (RMS)