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 in 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 in 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 to 200 W of continuous power per channel.