Product information ?German Maestro MRC 10008 D ? 2-Way Marine Coaxialsystem? The GermanMAESTRO?s high-quality speakers in the MARINA line are designed to meet the high-stress requirements found on the open waters. On-board sound systems are subjected to severe environmental effects, including saltwater, rain, direct sunlight and extreme temperature fluctuations. All components in the MARINA line are therefore put through stringent tests under the most extreme conditions to check their resistance to these elements. This results in an unmatched and long-term durable sound experience bringing your music perfectly on the water. Speaker baskets and grilles made of UV-resistant fiber-reinforced ABS plastic MARINA-R woofer with polypropylene cone 1? tweeters with titanium dome MARINA-R crossovers with special protective sealing lacquer and gold-plated terminals to resist corrosion Voice-coils protected against direct water spray Sealed solder joints Stainless steel V4A mounting screws included Separate mounting gaskets Technical data Diameter Tweeter: 2 x 25mm (2 x 1?) Diameter Midrange speaker: 25cm (10?) Principle: 2-Way-Coaxialsystem Power Handling: 150 W Max. Freq. Response: 25 ? 32.000 Hz Impedance: 4 Ohm Crossover Frequency: 3.000 Hz Sensitivity: 89 dB (2,83V/1m)