JL Audio M3-770X-S-GW 7.7" marine speakers (Gloss white with "Sport" grilles)Overview M3 7. 7 inch Marine Coaxial Speakers (70 W, 4 ) Gloss White Sport Grille Purpose engineered and built for real marine duty, M3 coaxial systems deliver excellent performance at a more affordable price than our maximum performance M6 models. The oversized 7. 7 inch design of the M3 770X results in increased efficiency (more output for a given amount of power). This gives them the ability to play louder and cleaner at high volumes than smaller