The sound you expect at home. The durability you need at sea.Each 131 environmental speaker has a tuned, ported enclosure and a proprietary Bose full-range driver for full, deep bass and clear, crisp high frequencies. Moreover, because they are designed to fit into a boat's pre-cut speaker holes, you can easily flush-mount 131 speakers for a neat, professional appearance. There is even an installation kit with mounting hardware included. Performance tested to the extreme. We put the 131 environmental speakers through test after test, and they came through with flying colours withstanding temperature extremes of 70C (158F) to -25C (-13F), and surviving the Salt Fog Test 66% longer than the demanding Marine Industry Standard. The performance and reliability of BOSE 131 speakers is backed by a three-year limited warranty. While all Bose speakers are thoroughly tested, the extreme demands placed on outdoor speakers require an even more rigourous evaluation. The BOSE engineers re-create extreme environmental conditions, like exposure to sunlight, rain, heat, ice, even corrosive salt and fog. They also simulate years of exposure to these conditions to ensure our outdoor speakers can deliver reliable, long-lasting performance

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