Features Carbon Fiber Cone 2" Dual 4Ohm Voice Coil Die-Cast Aluminum Basket with Radial Venting Weather Resistant Cone & Surround Large Gauge Compression Terminals Neodymium Radial magnet Motor Protective PVC Gasket Specifications Voice Coil Diameter 2.5" (63.5mm) Cone Material Carbon Fiber Cone Edge Rubber Surround Basket Type Die-Cast Aluminum Power Handling 400 W Dynamic Wattage 1000 W Resonant Frequency 35.813Hz Sensitivity @ 1W/1M 84.4dB Impedance 3.6Ω + 3.6Ω Product Manual Product Manual P