Purpose-engineered and built for real marine duty, the M-Series component speakers deliver maximum audio performance in any open-air boating environment. The M770-TCW component woofer is optimized to operate in a small sealed enclosure, such as a tower speaker system. If you need a 7.7-inch component woofer that operates without a dedicated enclosure, select our M770-CCW, instead. Although M770-CCW component woofers can be used with as little as 40 W per channel, for best audio performance we recommend amplifiers capable of between 75-150 W of continuous power per channel. Please note: this listing is for a single component woofer with an attached 2-way, passive crossover network and a grille. No tweeter is included. Sold individually.