RE Audio SRX15D2 15-Inch Dual 2 Ohm Performance Woofer Kraft Pulp Cone, Rubber Surround Pressed Steel Basket, 4-layer Copper Voice Coil FEA Optimized Motor Structure, Double-stack Magnets Linear Spiders, Foam Gasket Normal Impedance: Dual 2 Ohm, Power Handling: 300W (RMS)