JL Audio M6-770X - Marine 2-Way coaxial speakers 7.7"(196 mm).

JL Audio M6-770X-S-GmTi - 2-Way Coaxial Speakers 7.7"(196 mm), Gunmetal Trim Ring, Titanium Sport Grille

M6 7.7-inch Marine Coaxial Speakers for Infinite-Baffle Use (100 W, 4 Ω) - Gunmetal Trim Ring, Titanium Sport Grille
Purpose-engineered and built for real marine duty, M6 coaxial systems deliver maximum audio performance in any open-air boating environment.
The oversized 7.7-inch design of the M6-770X coaxial results in increased efficiency (more output for a given amount of power).
Combine that advantage with long excursion and excellent power handling and you have a speaker system truly capable of playing loud and clear in a powerboat at speed.
A 1-inch pure silk dome tweeter, specially treated to withstand the marine environment, handles the high-frequency duties.
You will appreciate the clean, articulate high-frequency response of the M6 dome tweeter, especially at higher volume levels.
A true 2-way passive crossover network is built into the terminal assembly to protect it from vibration and corrosion.
Although M6-770X Coaxial Systems can be used with as little as 40 W per channel, for best audio performance we recommend amplifiers capable of between 40-200 W of continuous power per channel.