JL Audio
10" Marine Subwoofer with Gunmetal Sport Grille

JL Audio M3-10IB-S-Gm-4
JL Audio M3-10IB-S-Gm-4 JL Audio M3-10IB-S-Gm-4 JL Audio M3-10IB-S-Gm-4 JL Audio M3-10IB-S-Gm-4 JL Audio M3-10IB-S-Gm-4


With appropriate system setup, the addition of a subwoofer allows your smaller main speakers to be free of the burden of reproducing low frequencies. This allows your whole system to play louder and to sound cleaner at all listening levels.

Purpose-engineered and built for real marine duty, the M3 infinite-baffle subwoofers are designed to operate without a dedicated enclosure and are targeted towards moderate power applications.

The M3-10 is best used with amplifier power in the 50W - 175W range and is optimized to operate with a large volume of air behind it (at least 2 cu. ft. / 56.6 l). If you need a Subwoofer that operates in a small sealed enclosure, select our M6-10W, instead.

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

Production of this model takes place in JL Audio's Miramar, Florida factory, using global materials and components.

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.

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.

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
10" (250 mm)
175W RMS
Nominal Impedance
Gray Metallic
Gray Metallic Sport


Free Air Resonance (Fs)
41.84 Hz
Electrical “Q” (Qes)
Mechanical “Q” (Qms)
Total Speaker “Q” (Qts)
Equivalent Compliance (Vas)
1.29 cu ft / 36.53 L
One-Way Linear Excursion (Xmax)*
0.42 in / 11 mm
Efficiency (1 W / 1 m)**
87.23 dB SPL
Effective Piston Area (Sd)
50.68 sq in / 0.0327 sq m
DC Resistance (Re)
3.957 Ω

* Xmax specifications are derived via one-way voice coil overhang method with no correction factors applied.

** Efficiency (1 W / 1 m) is not an accurate indicator of a subwoofer’s output capability and should not be used as a comparison to other subwoofers to determine which one is “louder”.

Enclosure Specifications

Infinite Baffle Use
Yes (preferred)
Min. Sealed Enclosure Volume
2.0 cu ft / 56.6 L (or larger)
Optimum Sealed Enclosure Volume
2.5 cu ft / 70.8 L


Nominal Diameter
10.0 in / 250 mm
Overall Diameter (A)
10.75 in / 273 mm
Mounting Hole Diameter (B)
8.875 in / 225 mm
Bolt Hole Circle Diameter (C)
9.706 in / 247 mm
Motor Outer Diameter (D)
5.29 in / 134 mm
Mounting Depth (E)
5.12 in / 130 mm
Driver Displacement
0.04 cu ft / 1.13 L
Net Weight
6.5 lb / 2.94 kg
More Information
Brand JL Audio
Color White
RMS Power 175W RMS
Subwoofer Size 10"
Nominal Impedance 4 Ω