JL Audio MM50 & XDM400/4 M6 Series 6.5" Boat Retrofit Kit - Choose your M6 Speakers

The ultra-compact XDM400/4 packs a serious full-range punch, generating a whopping 100 watts to each of its four channels into 2 ohms (14.4V, 1% THD). The technology that makes this much power possible in such a compact chassis is JL Audio's advanced NexD™ high-speed switching design, which permits full bandwidth Class D operation with extremely low distortion and remarkable efficiency.

Suitable for car or boat installations, the XDM400/4 is built with marine-grade materials and features an exclusive, dual-mode input filter for noise-free performance in boats or cars. Automatic turn-on capability (via signal sensing or DC-offset sensing) is also onboard for easy factory system upgrades.

Combine the XDM400/4 with JL Audio's XDM600/1 monoblock to build a stunning 1000 W amplification system to power four satellites and a subwoofer... and fit the whole thing under a seat or deck. Or, use the XDM400/4 by itself to power two satellites, plus a subwoofer.

The XDM400/4 includes a 12 dB / octave filter for each channel bank, which can be configured as a low-pass or high-pass filter and offers continuously variable cutoff frequency selection from 50-500 Hz. With the addition of an optional HD-RLC or MHD-RLC (water-resistant) remote level controller (each sold separately), you have the ability to adjust the level of all amplifier channels or just the rear channels directly from the driver's seat or cockpit.

Finished in a sleek, black powder-coat, all controls are protected beneath a gasketed, removable top cover for easy access.

M6 Loudspeakers fulfill JL Audio’s commitment to raise the bar with each product generation. The JL Audio engineering team has completely reinvented the premium marine loudspeaker, with major improvements in performance, precision and durability. Offered in multiple sizes and cosmetic options, most models are also available with a brilliant, new lighting technology.

Coaxial Speaker Technology

Every M6 coaxial loudspeaker starts with a long-excursion woofer designed with JL Audio’s proprietary motor, suspension and cone modeling systems to yield superior frequency response, smooth mid-range dispersion and linear performance at all listening levels. JL Audio’s acoustics laboratory in Miramar, Florida performs extensive testing on multiple generations of prototypes to refine every design and extract maximum performance.

Matching Silk-Dome Tweeters

Since the different size woofers in the M6 coaxials have different upper frequency response limits, each size pairs with its own specially designed, matching silk dome tweeter (0.8, 1.0, or 1.25-inch diameter). Each of these tweeters is precisely tuned via a rear cavity that optimizes its mid-range extension to seamlessly transition with its matching woofer. The result is smooth, evenly dispersed sound throughout the critical crossover region, making the overall sonic presentation clean and clear.

Advanced Built-In Crossover Networks

Crossover networks are a critical part of the M6 coaxial speakers’ acoustic design and are considerably more sophisticated than those used in most marine coaxial speakers. The M6-650X employs a 1st order low-pass and 2nd order high-pass filter, while the M6-770X and M6-880X apply a 2nd order low-pass and 3rd order high-pass filter. Each crossover network also employs an electronic tweeter protection circuitto minimize the possibility of tweeter failure.
The multiple components required inthese crossovers are laid out on a ring-shaped circuit board that is built into each speaker’s terminal assembly, ensuring that the crossover is secure and protected from the elements.

Transflective™ LED Illumination (On Illuminated Models)

Optional on most M6 models is JL Audio’s Transflective™ LED technology. By emitting light from multiple LEDs through our specially engineered cone material, this patent-pending breakthrough delivers a beautiful cone illumination effect, with no hot spots or reflections on the cone surface.
Choose from seven fixed lighting colors or control the color and intensity of the lighting actively using a lighting controller accessory (sold separately). Separate 12V wiring is required to power the illumination.

M3 Marine Coaxial Speakers - High-performance sound, engineered for real marine duty

Truly Engineered for Marine Duty

To ensure long-term performance, all models are designed and built to exceed industry standards for salt-fog and UV exposure. These are saltwater-rated products that you can use with confidence.

Outstanding Sound Quality

• Acoustically engineered to produce powerful, smooth sound in real-world, open-air, marine environments.
• Long-excursion, high-efficiency woofers and treated silk dome tweeters deliver superior output capability with clear, high frequency detail.
• Integrated 2nd order, high-pass filter on tweeters, with solid-state protection circuit to minimize the possibility of tweeter failure.

Versatile Power Requirements

• Suitable for use with standard marine head-unit power.
• Designed to benefit with quality amplification, such as the JL Audio marine amplifiers.

Choose Your Look

• Available in two grille styles: “Classic” or “Sport”, both in Gloss White. Sport models are also available in a sleek, all Gunmetal finish.
• Allows you to match the look of the speakers to the theme of the boat interior.

Built-In RGB LED Lighting

Included on this Sport grille model, multi-color LEDs are embedded within each speaker grille to produce vibrant accent lighting.
Choose from seven fixed-wiring lighting colors or connect a lighting controller accessory (sold separately) for adjustable control. (Separate 12V wiring is required to power the illumination.)
For optimal performance, we recommend using the JL Audio MLC-RW (Marine Lighting Controller).