Tower Coaxial Speaker System. 7.7" woofers with separate 1.0" dome tweeters. Woofers: Injection-molded mica-filled polypropylene cone bodies with synthetic rubber surrounds, specifically formulated for marine duty. Vented motor with marine-grade stainless steel rear diffuser plate. Precisely engineered dust cap profile for smooth upper-end response. Marine-grade, synthetic fiber spider with progressive roll design. DMA-optimized long-excursion design for enhanced output, bass extension and power handling. UV-resistant polymer baskets encapsulate motor structure. Optimized for tower-mount (small enclosure). Tweeters: High-Efficiency design with neodymium motor system 1" silk dome diaphragm with specially formulated treatment to withstand UV and salt-spray exposure. Ferrofluid-cooled and damped for improved response and power handling. Permanent grille-mounted design ensures optimal high-frequency performance with no loss of woofer radiating area. Crossover Networks: True two-way crossover with 1st order low-pass filter and 2nd order high-pass filter. Solid-state tweeter protection prevents tweeter failures due to abuse and resets automatically. Crossovers mount directly to woofer baskets, requiring no additional mounting provision. Mounting Clamps: NOTE: Please confirm the size of clamp you require when ordering. Clamp sizes below relate to Outside Diameter (OD) of tower tube: 1.042", 1.315", 1.66", 1.9", 2.375", 2.5" OD