JL Audio M3-770X-S-GM-I M3 Series 7.7" Marine Coaxial Speakers Gunmetal LED 70w

JL Audio M3-770X-S-GM-I M3 Series 7.7" Marine Coaxial Speakers Gunmetal LED 70w


7.7-inch (196 mm) Marine Coaxial Speakers, Gunmetal Sport Grilles with RGB LED Lighting

2-year-warrantyspeaker pair


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Product Information

M3 7.7-inch Marine Coaxial Speakers (70 W, 4 Ω) - Gunmetal Sport Classic Grille with RGB LED Illumination

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 speakers.

The woofer design is optimized to operate with a large volume of air behind it (at least 2 cu. ft. / 57 l). Operating this coaxial system in less space will compromise its low frequency performance.

A 0.75-inch pure silk dome tweeter, specially treated to withstand the marine environment, handles the high-frequency duties. Silk has been chosen for its lightness, excellent damping properties and smooth response characteristics.

Integrated into the Sport Grille’s frame, the internal LED lighting assembly was meticulously designed to uniformly illuminate the woofer’s cone area with a lively glow, adding a dramatic visual experience to your high seas journey. Add an optional RGB controller to create thousands of color variations. Professional installation is strongly recommended.

Although M3-770X Coaxial Systems can be used with as little as 20 W per channel, for best audio performance we recommend amplifiers capable of between 75-100 W of continuous power per channel.


  • Continuous Power Handling (RMS)    70 W
  • Recommended Amplifier Power (RMS)    20 - 140 W / Ch.
  • System Efficiency    90.5 dB @ 1 W / 1 m
  • System Nominal Impedance    4 Ω
  • System Frequency Response    45 Hz - 25 KHz ± 3 dB
  • Frame Outer Diameter (A)    7.70 in / 196 mm
  • Bolt Hole Circle Diameter (B)    6.92 in / 176 mm
  • Frontal Grille Protrusion* (C)    1.10 in / 28 mm
  • Mounting Hole Diameter (D)    6.25 in / 159 mm
  • Mounting Depth (E)    3.17 in / 81 mm

*Frontal grille protrusion measured from mounting surface

What's Included

  • Two 2-way Marine speakers with grilles attached
  • Twelve 1-1/8" Philips-head stainless-steel screws
  • 12 Stainless-steel flat washers
  • Owner's manual
  • Template

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