NVX 10-inch True 750 watt RMS 1500 watt Peak Professional Grade Dual 4-Ohm Car Subwoofer 3-Dimensional Die Cast Aluminum Basket [VCW104] Power Handling: 750 Watts RMS - 1500 Watts Peak 3-Dimensional Die Cast Aluminum Basket designed not to interfere with the magnetic energy of the voice coil Dual Nomex Poly-Cotton Spiders are designed to be durable and long-lasting Custom High-Roll Foam surround gives subwoofers improved linearity and more output Woven Fiber Pressed paper cone help reproduce tight and accurate bass with minimal cone distortion 10&#034; Dual 4-ohm VC-Series Car Subwoofer Power Handling: <ul class="a-unordered-list a-vertical"> RMS: 750 watts Recommended Power Range: 600 - 750 Watts RMS Impedance: Dual 4 ohms Pressed paper cone with woven fiber top Custom High Roll Foam Surround with Nylon Stitching Heavy Duty Die Cast aluminum basket for maximum rigidity Dual Poly-Cotton Spiders 2.5&#034; High Temperature Aluminum Voice coil 127oz. Triple stacked Ferite magnet motor structure with protective rubber boot Frequency response: 20-200 Hz Resonance Frequency (Fs): 29 Hz Optimal sealed box volume .70 cubic feet Optimal ported box volume: 1.50 cubic feet Top-mount depth: 6&#034; Sensitivity: 83dB