400 WATT POWER: Pyle’s 8 Inch Marine Subwoofer offers a peak power of 400 watts w/ 4ohm impedance. It lets you pump out some great low frequency bass volume to enhance the party vibe making it a great addition to your marine music audio system FOR ENHANCED SOUND: The Hydra subwoofer is a great addition to your marine stereo sound system. No sound system is complete without the perfect subwoofer for complimentary bass so don't deprive your boat from the absolute best sound you can get WATER-RESISTANT: The professional compact loud speaker system features a marine grade waterproof plastic case construction making it safe to be installed and used in places where moderate water splashes occur such as in marine vehicles SUPERIOR POWERFUL SOUND: The white outdoor bass speaker features an 8” high quality polypropylene cone. The 40 oz. magnetic structure and 1.5” high temperature voice coil boom w/ power and achieve a frequency response of 35 Hz to 3.5 kHz 8” SINGLE SUBWOOFER: The boat subwoofer can be installed under or in front of the compartment or helm, behind the helm seat or you can mount them inside a box or cooler. The subwoofer has an overall diameter of 8.5” and 3.60” mounting depth