The KMT60 marine tower speaker system is a long-range, high quality two-way system specifically designed for reaching listeners cruising in or being pulled behind a boat. Dual 6-1/2" woofers flanking a unique exponential horn-loaded, titanium dome tweeter intensity and carry the music across the water from any boat. Each speaker set is integrated into pair of stylish, injection-molded ABS enclosures that mount to a roll bar, complete with grilles that can be removed for a different appearance. Billet-aluminum mounting brackets adjust to seven common sizes to match most every wake tower or roll-bar diameter. The KMT60 is weather-resistant with sealed cones and motor assemblies. Minimum mounting diameter: 1-5/8"; maximum mounting diameter: 2-1/2". Speaker system measures 19-1/16"W x 9"H x 11"D.