Kicker 48CWR84 CompR Series 8" subwoofer with dual 4-ohm voice coils

8" Dual 4 ohms CompR/CWR Series Subwoofer Power Handling: Peak: 600 watts RMS: 300 watts Polypropylene Cone Forced Air Cooling to help our subs run 25% cooler than before High Temperature Voice coil 10.5 mm Xmax Ferrite magnet motor structure Frequency Response: 30 - 500 Hz Resonance Frequency (Fs): 44.4 Hz Sensitivity: 82.1 dB Sealed box volume: 0.4 cubic feet Ported box volume: 0.8 cubic feet Top-mount depth: 4 1/8" Cutout diameter: 7"