Subwoofer marin M7-12IB-C-GwGw-4 - visuel officiel 1

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JL Audio

010-03285-00

Marine subwoofer enclosure M7-12IB-C-GwGw-4

The JL Audio M7-12IB-C-GwGw-4 12-inch marine subwoofer is designed for low-frequency reproduction in marine environments. It delivers an RMS power handling of 600 watts and is optimized for infinite-baffle mounting applications, requiring a rear air volume of at least 84.95 liters. Its design incorporates UV- and corrosion-resistant materials for enhanced durability.

Shipped with marine-grade stainless steel mounting hardware.

Price excl. import taxesBenefit from the professional rate

£620.36 GBP

£620.36 GBP ~~£690.59 GBP~~

Shipping calculated at checkout.

Prices exclude import taxes. DAP delivery: import taxes are paid on delivery.

Available in stock

Free pickup point from €150 in France
Pickup at Skysat possible

Custom installation

Trust Skysat to install the equipment on board

Request a quote

Installers near you

thanks to our network of approved installers

Find an installer

Support service

Opt for additional installation assistance

Technical specifications

Speaker Diameter In	12
IP rating	Resistant to seawater
Color	White
Product barcode	0699440936699
Enclosure Type	Infinite baffle
Impedance	4
Cutout diameter	306.4
Mounting Depth	171 mm
Mounting Flange Diameter In	12.813
Mounting Flange Diameter Mm	325.4
Mounting Pilot Hole Diameter Fiberglass Thick	3.57
Mounting Pilot Hole Diameter Fiberglass Thin	3.175
Mounting type	Flush-mounted
Operating voltage	12
Overall Diameter In	14.00
Overall diameter mm	355.6
Weight	14.05

Detailed description

Designed for demanding marine environments, the JL Audio M7-12IB-C-GwGw-4 marine subwoofer with a 12-inch (300 mm) driver delivers deep bass for onboard audio systems. It is optimized for infinite-baffle mounting, requiring a rear air volume of at least 84.95 litres (3 ft³). This model is also compatible with large sealed or ported enclosures.

Audio performance and power

The subwoofer features a 600-watt RMS power handling and a nominal impedance of 4 ohms. Its high-temperature 4-inch (10.16 cm) voice coil and 18.5 mm maximum linear excursion (Xmax) contribute to high efficiency and low distortion. Sensitivity is 86.7 dB SPL (1 W / 1 m), and its free-air resonance frequency (Fs) is 35.34 Hz. It is recommended to pair it with an amplifier delivering between 200 and 600 watts. The motor system is optimized by JL Audio’s DMA (Dynamic Motor Analysis) technology for precise and articulate bass.

Marine-grade design and durability

The JL Audio M7-12IB-C-GwGw-4 features an injection-molded polypropylene cone (mica-loaded) and a synthetic rubber surround formulated with UV inhibitors. The corrosion- and UV-resistant polymer basket encapsulates the motor system, while the marine-grade synthetic spider with progressive profiles resists high humidity. The connection terminals are gold-plated marine-grade brass. This subwoofer undergoes UV testing (to simulate sun exposure) and salt-fog chamber testing (to simulate saltwater exposure) to ensure reliability and longevity in marine conditions. Net weight is 11.5 kg (25.35 lbs).

Installation and additional features

The cutout diameter for installation is 306 mm (12.0625 inches), and the mounting depth is 202 mm (7.94 inches). An optional RGB LED lighting system is available, requiring a separate 12 V wiring harness for each speaker. Individual wires allow for up to seven fixed LED colors; an RGB lighting controller (sold separately) is required for adjustable settings. A fast inline fuse must be installed on the positive LED wire to protect components. Marine-grade stainless steel mounting hardware is included.

Documentation

Type	Nom
	Gabarit de montage - Gabarit d'installation pour subwoofer marin M7-12IB (EN)
	Notice d'installation - Instructions d'installation pour subwoofer marin M7-12IB

Expert opinion

« JL Audio M7-12IB Subwoofer: Performance and Durability in Marine Environments »

The JL Audio M7-12IB-C-GwGw-4 marine subwoofer is a strategic solution for marine audio installations where space for a dedicated enclosure is limited or undesirable. Its optimized design for "infinite-baffle" mounting allows direct installation in a bulkhead, provided there is a rear air volume of at least 84.95 litres. This integration flexibility is a major asset for pleasure boats or fishing vessels where every centimetre counts.

The robustness of its design is a key differentiator. The use of materials specifically formulated to resist UV and corrosion—such as the mica-filled polypropylene cone, synthetic rubber surround, and polymer basket encapsulating the motor—ensures extended longevity in a saline environment. Rigorous testing in salt-fog chambers and UV exposure validates this durability focus.

With an RMS power handling of 600 watts and a 4-inch voice coil, this model is suited to high-power audio systems capable of delivering deep, articulate bass without significant distortion, thanks notably to the DMA motor optimization. The optional RGB LED lighting adds a customizable aesthetic dimension, though this requires separate 12V wiring and an inline fuse, which must be factored into the electrical installation planning.

This subwoofer is ideal for owners seeking reference-level audio performance and long-term reliability without compromising on visual integration or footprint. It targets demanding installations where sound quality and resistance to marine elements are priorities.

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Marine subwoofer enclosure M7-12IB-C-GwGw-4

£620.36 GBP

£620.36 GBP ~~£690.59 GBP~~

Frequently Asked Questions

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What is the size of this JL Audio M7 marine subwoofer?

This JL Audio M7-12IB-C-GwGw-4 marine subwoofer is 12 inches (300 mm).

Is this subwoofer specifically designed for marine use?

Yes, the JL Audio M7-12IB-C-GwGw-4 subwoofer is designed for demanding marine environments, providing low-frequency reproduction suitable for onboard audio systems.

What is the acoustic design type of this marine subwoofer?

This subwoofer is of the "Infinite Baffle" (IB) type, meaning it is designed to operate without a sealed or ported enclosure, using the boat's air volume as the enclosure.

What is the nominal impedance of this subwoofer?

The nominal impedance of this subwoofer is 4 ohms.

Does the subwoofer have integrated LED lighting?

Yes, this subwoofer is equipped with integrated RGB LED lighting. This is an optional feature that requires separate wiring.

What colors are available for the built-in LED lighting?

The LED lighting can be wired to provide up to seven fixed colors. For adjustable control and a wider color range, an RGB lighting controller is required and sold separately.

Does installing this subwoofer require any specific tools or equipment?

Yes, installing this subwoofer requires appropriate tools and safety equipment. Professional installation is strongly recommended to ensure optimal performance and safety.

What safety precautions should I take before installing the subwoofer?

Before proceeding with the installation, it is important to turn off the audio system and disconnect the system's battery. Additionally, before any cutting or drilling, always check for potential obstacles behind the mounting surfaces.

Are there any areas where installing this subwoofer is not recommended?

Yes, it is strongly advised against installing this product in an engine compartment or any other area exposed to extreme heat. It must also be securely fastened to prevent damage or injury under severe conditions.

What are the recommendations for through-hull fitting installation in fiberglass?

For #10 screws, the recommended pilot hole sizes are as follows:

For fiberglass with a thickness of 0.125 inch (approx. 3.175 mm) or less: use a 1/8-inch drill bit.
For fiberglass thicker than 0.125 inch: use a 9/64-inch drill bit.

How should I wire the RGB LED lighting for this subwoofer?

The LED feature requires a separate 12V wiring run to each speaker location. You must install a 750 mA fast-blow inline fuse on the positive wire, at the power source end of the LED cable, to protect the LEDs and speaker from excessive current.

What type and rating of fuse are required for the subwoofer LED lighting?

You must install a 750 mA fast-blow inline fuse on the positive wire of the LED cable, on the power source side, to protect the LED lighting and subwoofer from overcurrent.

Is it necessary to buy a separate controller for RGB LED lighting?

For adjustable control of RGB LED lighting colors, an RGB lighting controller is required and must be purchased separately. Without this controller, you can achieve up to seven fixed LED colors by wiring the individual wires.