JL Audio M3-770X-S-GM-I 7.7" marine speakers with LED lightsGet the LED out Having toured JL Audio myself, I can tell you these guys take two things very seriously great sound and life on the water. These M3 770X S Gm i 7. 7" marine speakers combine durable, marine ready design, outstanding audio performance, and the cool look of subtle blue lighting. Supplied with plenty of power, these oversized speakers can overcome that wicked combination of wind, water, and engine noise. Plus, the built in LED lighting