BOSS Audio Systems MR6B 180 Watt (Per Pair), 6.5 Inch, Full Range, 2 Way Weatherproof Marine Speakers (Sold in Pairs). Fully Marinized is the term we use for our Marine and Outdoor products that are Weather Proof. We integrate high-tech, state-of-the-art waterproofing materials plus special UV coatings for plastic surfaces, coated circuit boards and connections to protect the product against the harsh outdoor elements and resist corrosion. Sail away while listening to your favorite music with these BOSS Audio Systems MR6B marine speakers, which feature 6-1/2" carbon-composite, dual-cone woofers and a Kapton voice coil to ensure crisp, dynamic sound across a wide spectrum.