JL Audio MM55 Media Master 55
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JL Audio MM55 MediaMaster 55 Premium Marine Source Unit
Premium Audiophile Performance in a Sleek, Space-Saving Design.
Looking for top-tier marine sound but working with limited dash space? The JL Audio MediaMaster® 55 (MM55) delivers a high-end, heavy-duty audio experience package designed specifically for smaller center consoles, pontoons, cruisers, 4WD canopy setups, and powersport vehicles.
Equipped with a built-in high-efficiency Class-D amplifier pumping out 100 Watts of total system power (25W RMS x 4), the MM55 can drive up to two zones of speakers directly without requiring a bulky external amplifier. It's the ultimate all-in-one source unit for boaters and off-roaders who refuse to compromise on sound quality.
Built For The Elements, Engineered for Direct Sunlight
The MM55 features a 2.8-inch full-color TFT LCD display that is optically bonded. By eliminating the air gaps between display layers, reflections are dramatically reduced, ensuring your screen remains crisp, high-contrast, and entirely legible even in direct afternoon sun. Combined with large, intuitive backlit controls sealed behind a watertight membrane, adjusting your tunes is completely foolproof on choppy water or rough trails.
Key Features & Benefits
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100W Built-In Class-D Power: Skip the extra hardware. The highly efficient internal amp powers 4 channels (2-ohm stable), delivering loud, clean sound while running cool on your vehicle's electrical system.
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True Multi-Zone Control: Take command of up to 3 independent audio zones. Run 2 zones directly off internal power (e.g., Bow and Cockpit) and expand into a 3rd zone using the high-quality RCA preamp outputs for an added amplifier or subwoofer.
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IP67 Weatherproof Protection: Engineered for harsh marine environments and dust-heavy overlanding routes. The control surface is fully dust-tight and rated to withstand water immersion up to 1 meter.
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NMEA 2000® Networking: Seamlessly connect the MM55 to your Garmin, Lowrance, Simrad, or Raymarine Multifunction Display (MFD) to control your soundtrack straight from your fishfinder or chartplotter screen.
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Modern Media Connectivity: Features high-fidelity Bluetooth® streaming with Qualcomm® aptX™, dual direct-digital USB connections for smartphone playback/charging, and a global AM/FM radio tuner with RDS data display.
Technical Specifications
| Feature | Specification |
| Display | 2.8-inch optically bonded full-color TFT LCD (320 x 240) |
| Built-in Amp | Class-D, 2-ohm stable (25W RMS x 4 channels / 100W Max) |
| Waterproof Rating | IP67 (Control surface) |
| Audio Zones | 3 independent zones (2 powered, 1 preamp output) |
| Preamp Outputs | 9 channels total (1 stereo pair + mono subwoofer per zone) |
| Preamp Max Output | 4V RMS |
| Connectivity | Bluetooth aptX, USB Input (with charging), AUX analog input |
| Dimensions (H x W x D) | 95 mm x 118 mm x 93 mm |
| Network Support | NMEA 2000® Certified |
What's In The Box?
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JL Audio MM55 MediaMaster® Weatherproof Stereo
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Protective Sun Cover
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Mounting Gasket & Hardware
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Power/Speaker Harness
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User Manual
Big Sound, Small Footprint
Don’t let a crowded dash stop you from getting true high-fidelity sound. The JL Audio MM55 bridges the gap between rugged utility and high-end audio performance. Install it, crank it up, and own your outdoor soundtrack.