JL Audio M3-650X-S-GM 6-1/2" marine speakers (Gunmetal with "Sport" grilles)Overview M3 Standard Flange 6. 5 inch Marine Coaxial System (60 W, 4 ) Gray Metallic 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 M3 650X 6. 5 inch coaxial speaker is designed around the standard marine 6. 5 inch speaker format and features a wide mounting flange with a six hole mounting pattern. The long excursion