M7-12IB-C-GwGw-4 12-inch (300 mm) Marine Subwoofer Driver, Gloss White Trim Ring, Gloss White Classic Grille, 600W RMS; When JL Audio puts the number "7" in a speaker´s model series, you can be sure it is something very special. M7´s are extreme subwoofers, with oversized, overbuilt components and very powerful motor systems. They are optimized for high-power, infinite baffle operation and require special attention to the mounting surface to perform at their peak. M7 is available with (or without) our patented Transflective™ RGB lighting technology, in Sport or Classic grille styles, and in white or gunmetal/titanium finishes.