Product Features8in Single 4 ohm W3v3 Series SubwooferPower Handling:Peak: 500 watts RMS: 250 wattsRecommended Power Range: 50-250 wattsImpedance: Single 4 ohmMineral-filled polypropylene cone wooferRubber surroundDMA optimized motor systemElevated frame coolingVented reinforcement collarFloating Cone Attach Method (FCAM)Insert molded suspension, coil, and terminal-sub assemblySurround stress relief designCustomizable trim ringSensitivity: 83 dB1-year SonicElectronix.com warranty