Enclosed Tower Coaxial Speaker System, Gloss White, Classic Grilles (100 W, 4 Ω). Enclosed in these beautiful, all-fiberglass enclosures are our maximum-performance, M-Series 7.7-inch coaxial tower speakers. Specifically tuned for tower enclosure applications, these coaxial drivers deliver clean, loud audio that can be heard well beyond the boat when mounted up high. The enclosures feature machined aluminum accents and each includes a very sturdy, spline-based mount, designed to mate with one of our clamp systems (sold separately, and available to fit a wide range of pipe diameters). The wire exits through the center of the mount, staying high and dry, and out of sight. Professional installation is strongly recommended.