MB Quart Nautic NWF254 10" SVC 2-Ohm Subwoofer 10 SVC 200 Watts, 4-Ohm Subwoofer Special protective sealing lacquer and gold-plated terminals resist corrosion Voice coils are protected from direct water spray Sealed solder joints protect against moisture; Stainless-steel V4A mounting screws Meets or exceeds ASTM requirements