MB Quart Nautic NKF692 6 X 9" 2-Way Coaxial Speaker System UV resistant fiber-reinforced ABS composite baskets and grilles Insert injection-molded magnet systems Meets or exceeds ASTM requirements 3/4-Inch tweeter with titanium dome Nautic crossover with special protective sealing lacquer Gold plated terminals to resist corrosion Protected voice coils from direct water spray Sealed solder joints Stainless steel mounting screws 6 x 9" 2-Way Coaxial Speaker System with 60-130 Watt Power Rating and 50Hz-25kHz Frequency MB Quart UV-resistant fiber-reinforced ABS composite speaker baskets and grilles for low resonance; Insert injection-molded magnet systems that provide optimized protection against humidity and mechanical influences Compliance to the ASTM D4329-05, which ensures resistance to deterioration, physically, electrically and mechanically when exposed to all combinations of ultra-violet, natural sunlight, extreme heat, extreme cold and saltwater in marine applications Nautic crossover with special protective sealing lacquer and gold-plated terminals to resist corrosion; Protected voice coils from direct water spray Corrosion-resistant connectors, stainless-steel mounting hardware and sealed solder joints protect against damaging moisture and salt