Give your boat or off-road vehicle an audio boost with these MB Quart Nautic waterproof speakers. Handles up to 80W peak power (40W nominal) Provides rich sound. 35Hz – 21kHz frequency response Ensures a wide range of accurately reproduced sound. Handles up to 80W peak power (40W RMS); 6-1/2 inch composite polypropylene cone woofer; 3/4 inch composite tweeter.