The Pyle PLMRW8 8 Inch 400 Watt Peak 4 Ohm Water Resistant Marine Subwoofer is constructed from a water-resistant plastic case so they re perfect out at sea or on land. Supported by the 40-ounce magnet structure this single subwoofer is equipped with a 1.5-inch high-temperature voice coil. It features a high-density polypropylene woofer surround for added durability. This subwoofer can achieve a frequency response of 35 Hz to 3.5 kHz. Includes (1) 8-inch subwoofer mounting gasket and instruction manual. This subwoofer features a marine-grade water-resistant construction so it s perfect rain or shine. It s great to use in your car boat off-road and marine vehicle applications. Enjoy your music on land or water with the Pyle PLMRW8 8 Inch 400 Watt Peak 4 Ohm Water Resistant Marine Subwoofer.