JL Audio
3-Way 10" Marine Enclosed Subwoofer System (Left)

Special Price $1,664.99 Regular Price $1,849.99
JL Audio M6-103EWS-Gw-C-3Gw-L
JL Audio M6-103EWS-Gw-C-3Gw-L


This amazing 3-Way large-format speaker system combines the power of our maximum-performance 10" marine subwoofer with our 7.7" coaxial speaker to deliver true full-range, high-output performance in open-air marine installations. It is ideal for larger vessels and party decks where quality, high-output sound is needed.

The enclosure actually consists of two individual chambers. The larger chamber houses the subwoofer and is precisely tuned to deliver outstanding quality sub-bass response in an open-air boat installation. Loaded inside, is our maximum-performance M6-10W-C-GwGw-4 10" subwoofer. The smaller chamber houses our M6-770X-C-GwGw maximum-performance coaxial.

This system is designed for a bi-amplified application with an active crossover, where the subwoofer is powered by its own amplifier (or channel), with a low-pass filter set at 80 Hz. The coaxial driver needs to be powered by another amplifier channel with a high-pass filter set at 80 Hz. For best results, the subwoofer should be powered with an amplifier in the 150-250W range, while the coaxial driver should be powered with an amplifier in the 75 - 150W range.

Please note that there are specific models for left-side and right-side installations. A grommet is provided for exiting the speaker cables, and a solid aluminum mounting plate with stainless steel hardware is also provided to secure the enclosure to the mounting surface. Professional installation is strongly recommended.

Like all JL Audio marine speakers, this system is built to withstand a real saltwater marine environment and deliver years of listening enjoyment.

Production of all M6 loudspeakers takes place in JL Audio’s Miramar, Florida factory, using global components and materials.

Marine Materials / Testing

The design of marine products requires extensive materials testing to achieve reliability and longevity.

Building serious marine products requires a real commitment to environmental testing and materials specification. To this end, JL Audio has invested in Ultraviolet testing chambers (to simulate years of sun exposure) and Salt Fog chambers (to simulate years of exposure to salt-water environments). This testing is critical to building products that will not only sound great in your boat, but will also sound great for many, many years.

Materials Used

  • Injection-molded mica-filled polypropylene cone bodies with synthetic rubber surrounds, specifically formulated with UV inhibitors for marine duty.
  • Marine-grade, synthetic fiber spiders with progressive roll designs to withstand high humidity.
  • Specifically engineered polymer baskets are corrosion and UV-resistant and encapsulate the woofer's motor system to prevent corrosion.
  • Gold-plated, marine-grade brass connection terminals
  • Marine-grade stainless steel mounting hardware is included.

DMA Optimized Motor

JL Audio's proprietary Dynamic Motor Analysis system is a powerful suite of FEA-based modeling systems, first developed by JL Audio in 1997 and refined over the years to scientifically address the issue of speaker motor linearity. This leads to vastly reduced distortion and faithfully reproduced transients... or put simply: tight, clean, articulate bass.

Built-In USA with Global Components

At a time when most audio products are built overseas, JL Audio’s commitment to in-house loudspeaker production continues to grow. To pull this off in a competitive world market, our production engineering team has created one of the world’s most advanced loudspeaker assembly facilities and established a global network of quality component suppliers who build to our specifications. This, combined with our commitment to state-of-the-art assembly technology, allows our skilled workforce to efficiently build JL Audio products to extremely high quality standards, right here in the U.S.A.


Subwoofer Size
Speaker Size
Enclosure Color
Gloss White
Subwoofer Color
Gloss White
Gloss White Classic
Enclosure Type
System Nominal Impedance
4Ω Coaxial
4Ω Subwoofer
Continuous Power Handling (RMS)
100W Coaxial
250W Subwoofer
Recommended Amplifier Power (RMS)
75 - 150W Coaxial
150 - 250W Subwoofer

Note: Separate amplifier channels with active crossover filtering (not included) are required for subwoofer and coaxial speaker.


Enclosure Width (W)
25.90 in / 658 mm
Enclosure Height (H)
13.62 in / 346 mm
Enclosure Depth (D)
11.96 in / 304 mm
42 lb / 19.05 kg
More Information
Brand JL Audio
RMS Power 250W RMS
Shallow Mount No
Subwoofer Size 10"
Shallow Mount Enclosure No