Description
JL Audio JLA-010-03365-00 MM55 MediaMaster 55 Stereo - Weatherproof Marine Source Unit with Full-Color LCD Display
Compact IP67 weatherproof marine source unit with built-in Class D amplification, full-color optically bonded display, and multi-zone technology for complete boat audio systems.
Product Overview
The JL Audio MediaMaster 55 (MM55) marine stereo (JLA-010-03365-00) delivers professional-grade marine audio in a compact, all-in-one package combining source unit, built-in amplification, and multi-zone control. This premium marine head unit features a bright 2.8-inch full-color TFT LCD display with 320 x 240 resolution and optically bonded construction that eliminates air gaps for exceptional visibility in direct sunlight and reduces glare. The built-in Class D amplifier delivers 25 watts RMS per channel across four channels (2-ohm stable), providing clean power to drive two zones of speakers directly without external amplification—perfect for helm and cockpit installations in small to mid-size boats. The innovative Multi-Zone technology extends to three independent audio zones when combined with external amplifiers for additional zones, each with dedicated RCA pre-outs including left/right outputs plus mono subwoofer output. Comprehensive source options include digital AM/FM radio with RDS data display (plus DAB+ capability for Europe), Bluetooth wireless streaming, USB port supporting audio file playback and smartphone charging, and auxiliary input for additional sources. The IP67 weatherproof rating ensures complete protection against water immersion and dust intrusion when properly installed, while NMEA 2000 networking integration enables control from compatible marine electronics. The compact form factor (4.65" W x 3.74" H) fits spaces where larger head units cannot, making it ideal for center console boats, pontoons, smaller cruisers, and powersports vehicles.
Features & Benefits
The 2.8-inch optically bonded full-color TFT LCD display with 320 x 240 resolution eliminates air gaps between screen layers, dramatically improving visibility in direct sunlight while reducing glare and reflections—critical for marine environments where traditional displays wash out. Built-in Class D amplifier delivers 25 watts RMS per channel (100 watts total system power) to four speaker connections, providing clean, efficient power for two zones of speakers without requiring external amplification, simplifying installation and reducing system cost. IP67 weatherproof rating on the control surface protects against complete water immersion up to 1 meter depth, dust intrusion, and saltwater spray, ensuring reliable operation in the harshest marine environments. Multi-Zone technology enables control of three independent audio zones: two zones powered directly by built-in amplification plus one additional zone via RCA pre-outs, allowing helm speakers to play one source while cockpit and cabin areas play different sources simultaneously. Comprehensive source integration includes digital AM/FM radio with RDS data display providing station information and song titles, DAB+ digital radio capability in Europe for superior broadcast quality, Bluetooth wireless streaming from smartphones and tablets with up to 35-foot range, USB port supporting multiple audio formats plus 1A smartphone charging, and auxiliary RCA input for additional sources. Three-zone RCA pre-out configuration provides dedicated left/right outputs plus mono subwoofer output for each zone when using external amplification, enabling system expansion for tower speakers, additional cabin zones, or dedicated subwoofer systems. NMEA 2000 networking allows integration with compatible marine electronics for unified system control and data sharing. Compact dimensions (4.65" W x 3.74" H x 3.66" D) fit tight dash spaces in center console boats, compact cruisers, pontoons, and powersports vehicles where full-size head units cannot mount. 2-ohm stable amplification maximizes power delivery to marine speakers designed for low-impedance operation. Extreme temperature operating range (-20°C to +65°C) ensures reliable performance from arctic to tropical conditions.
Technical Specifications
| Specification |
Details |
| Model |
JLA-010-03365-00 MediaMaster 55 (MM55) |
| Display Size |
71 mm (2.8 inches) |
| Display Type |
Full-color TFT LCD, optically bonded, backlit |
| Display Resolution |
320 x 240 pixels |
| Control Surface Rating |
IP67 (water/dust protection) |
| Operating Temperature |
-20°C to +65°C (-4°F to +149°F) |
| Built-In Amplifier |
Class D, 2-ohm stable |
| Amplifier Power |
25W RMS x 4 channels (100W total) |
| Multi-Zone Technology |
3 independent zones |
| Dimensions (H x W x D) |
95 x 118 x 93 mm (3.74" x 4.65" x 3.66") |
| Power Input |
10-16 VDC |
| Current Draw (Max) |
15 Amperes |
| Bluetooth Range |
Up to 11 meters (35 feet) |
| NMEA 2000 LEN |
1 (50 mA) |
| Audio Sources |
Digital AM/FM (RDS), DAB+ (EU), Bluetooth, USB, Aux |
| USB Audio Formats |
MP3, MP4, WAV, AAC, M4A, M4B |
| Auxiliary Inputs |
1x RCA (2V or 1V RMS sensitivity) |
| USB Ports |
1 (storage device, 1A charging output) |
| Speaker Connections |
4 (2 zones amplified directly) |
| Zone 1-2 Outputs |
Built-in amplification (speaker level) |
| Zone 3 Outputs |
RCA pre-outs (L+R+Sub, requires external amp) |
| Total RCA Pre-Outs |
3 zones (L+R+Sub per zone) |
| NMEA 2000 Ports |
1 (Micro-C connector) |
| Antenna Ports |
1 |
| Multi-Language Support |
English, French, German, Italian, Spanish |
| Software Updates |
USB |
| Warranty |
3 years |
| Included Accessories |
Power harness, speaker harness, gasket, template, screws, sun cover |
Compatible With / Goes Well With
JL Audio Marine Speakers (Direct Connection): M3 Marine Speakers (coaxial or component), M3 Enclosed Tower Speakers for zones 1-2 powered directly by built-in amplification
JL Audio Marine Amplifiers (Zone 3 Expansion): MX Marine and Powersports Amplifiers (MX280/4, MX300/1, MX500/1, MX600/3), MVi Marine Amplifiers, MHD Marine Amplifiers, XDM Car and Marine Amplifiers for zone 3 external amplification
JL Audio Marine Subwoofers: M3 Marine Subwoofer, M6 Marine Subwoofer, M7 Marine Subwoofer for zone-specific bass reproduction with external amplification connected to dedicated subwoofer RCA outputs
Powersports Applications: Polaris RZR Stealthbox systems (SB-POL-RZG2SPKR/M3-650i, SB-POL-RZG3/10TW3), VeX Enclosed Systems for UTV and side-by-side audio installations
System Components: JL Audio XMD-WHTAIC2 series RCA interconnects for zone 3 amplifier connections, compatible NMEA 2000 marine electronics for integrated networking, marine speaker wire for zones 1-2 direct connections
Installation Requirements: 12V DC marine electrical system (10-16V), dash mounting location (4.65" W x 3.74" H cutout), antenna for AM/FM/DAB reception, proper gasket installation for IP67 rating, 4-ohm or 2-ohm speakers for optimal power delivery from built-in amplification
Frequently Asked Questions
What's the advantage of built-in amplification versus requiring external amps like the MM105? The MM55's built-in 25W x 4 amplification powers two zones of speakers directly (helm and cockpit, for example) without requiring external amplifiers, significantly simplifying installation and reducing system cost. For smaller boats, personal watercraft, or budget-conscious installations where 25 watts per channel provides adequate volume, the MM55 delivers a complete audio system in a single unit. You can still add external amplification for zone 3 (tower speakers, cabin area, or subwoofer) when more power or additional zones are needed, providing flexibility to start simple and expand later.
How does the optically bonded display improve visibility compared to standard displays? Optical bonding eliminates the air gap between the LCD panel and protective glass, dramatically reducing internal reflections and glare that plague standard displays in bright sunlight. This technology also increases contrast and color saturation, making the display remain clearly readable even in direct tropical sun where traditional marine displays wash out and become nearly impossible to read. The bonded construction is also more durable, better resisting shock and vibration common in marine environments.
Can I power all my speakers directly from the MM55 or do I need external amplifiers? The MM55 can power up to 4 speakers directly (two stereo zones) with its built-in 25W x 4 amplification. For typical 4-speaker installations in small boats (helm speakers plus cockpit speakers), no external amplification is needed. However, for larger systems requiring tower speakers, multiple zones, subwoofers, or more than 25 watts per channel, you'll need external amplification connected to the zone 3 RCA pre-outs. The MM55 works as a standalone solution for basic systems or as the hub of larger systems with external amplification.
What size boats is the MM55 best suited for? The MM55 is ideal for boats 16-25 feet including center consoles, bowriders, pontoons, deck boats, and smaller cruisers where dash space is limited and a compact all-in-one solution is preferred. It's also perfect for personal watercraft (PWC/jet skis), UTVs, ATVs, and side-by-sides requiring weatherproof audio. The 25W x 4 built-in amplification provides adequate volume for small to mid-size boats in outdoor environments. For larger vessels (26+ feet) requiring higher power levels or more than three zones, consider the MM105 with external amplification throughout.
How does the MM55 compare to the MM105 for my installation? Choose the MM55 if: (1) you want built-in amplification without external amps for a simpler installation, (2) 25 watts per channel provides adequate power for your application, (3) you need a more compact form factor (4.65" vs 5.95" width), (4) three zones maximum meets your needs, (5) one USB port and one auxiliary input are sufficient, (6) you don't need SiriusXM capability. Choose the MM105 if: (1) you want external amplification throughout for maximum power and flexibility, (2) you need four independent zones, (3) you require dual USB ports and dual auxiliary inputs, (4) SiriusXM satellite radio is important, (5) you prefer the larger 3.5" display. Both offer IP67 protection, NMEA 2000, Bluetooth, and exceptional build quality.
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