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

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


7.7-inch (196 mm) Marine Coaxial Speakers, Gunmetal Sport Grilles

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

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.

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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