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.