Installing basic flush-mount stereo speakers on a boat is relatively easy, but there are a few tricks that help to optimize the sound quality and ensure the longest possible life of the speakers. First and foremost, buy marine speakers. Brands such as Boss, Clarion, Fusion, JBL, JL Audio, Jensen, Kicker and Polk offer special flush-mount, coaxial speakers designed for the wet, corrosive environment of a boat, with features that include waterproof cones, sealed magnets, mounting gaskets, stainless-steel hardware and UV- and rustresistant covers.
With the exception of a subwoofer, most speakers come in pairs, and most deck boats and runabouts have room for one to three pairs of speakers. Most stereo units have speaker outputs for as many as three to four pairs. Additional speakers and a subwoofer might require…