Mark 2 are the next generation of Indoor/Outdoor/Bookshelf speakers from Russound. Designed to deliver rich, full sound in extreme environments, such as a backyard, patio, deck, or other areas subjected to temperature shifts and high-moisture exposure. Their high-efficiency design and multiple mounting options allow these speakers to be easily installed on a wall, eave, pole, corner or as a freestanding stereo pair.With a lineup of four models, the speakers are equipped with features that ensure durability in any outdoor conditions. Sealed enclosures, salt-tested marine-grade hardware, and aluminum grilles make the speakers rugged and extremely weather-resistant for all-season enjoyment. Drivers with polypropylene cones, rubber surrounds and inch Teteron dome tweeters deliver full-range audio through a wide range of temperatures.