The new MWF premium Kicker marine subwoofers redefine bass performance on the water, setting a new benchmark for sound quality and durability. Engineered for high power handling and built with robust materials, these subwoofers are the ultimate choice for any marine audio setup. Spec: 10 inch Designed for 'free air' applications 4 Ohm Voice Coil RMS Power: 200W-400W Frequency response (Hz): 20-500 Sensitivity: 84dB