MTX TM1204 12-Inch Marine Subwoofer Polypropylene cone woofer Rubber surround Gold plated terminals and stainless steel hardware ABS plastic protects electrical components and magnet from salt or fresh water Tested 500hrs ASTM B117, D4329 for durability and resistance to environment 12-inch marine Subwoofer with 400 watts (200 watts RMS) peak power handling at 4 ohms Weather-resistant polypropylene cone woofer with rubber surround Gold-plated terminals and stainless steel hardware for increased corrosion resistance ABS plastic protects electrical components and magnet from salt or fresh water spray Tough Centrex ASA plastic grilles provide additional protection from the elements