JL Audio M3-770ETXV3-SB-S-GM 7.7″ Tower Speakers The JL Audio M3-770ETXV3-SB-S-GM is a pair of 7.7-inch tower speakers featuring a satin black enclosure and gunmetal sport grille, with a sensitivity of 90 dB. These speakers are designed for high-quality sound output in tower installations on boats. Compatibility & Applications Fits standard 7.7-inch speaker cutouts in tower installations. Pairs with JL Audio amplifiers for optimal sound performance. Mounts on wakeboard towers and T-tops for boats over 20 ft. Replaces older JL Audio 7.7-inch tower speaker models without modification. Integrates with marine audio systems utilizing 12V DC power. Wires to multifunction displays for enhanced audio control. The unit is designed for high-volume sound reproduction in open-air environments, utilizing UV-resistant materials to endure harsh marine conditions. It serves as a direct replacement for previous JL models, allowing for straightforward installation on wakeboard towers, ensuring an efficient upgrade path without additional modifications.