Genuine JL Audio MediaMaster® MM55 premium compact marine digital media receiver (no CD) built for harsh helm environments. With an IP67-rated control surface, 3-zone audio management and NMEA 2000® connectivity, the MM55 is ideal for multi-zone boat audio systems that need reliable, high-fidelity control.

OEM reference: 010-03365-00 (JL Audio ref. 99975). SKU: JLMM55.

Key features & specifications

• Marine-rated design: IP67-rated control surface for marine duty
• Display: 2.8 in TFT LCD (320 × 240) with day/night viewing modes
• Built-in amplifier: 25 W RMS × 4 @ 4Ω (100 W total); minimum impedance: 2Ω per channel; fuse: 15 A
• Multi-Zone audio: Up to 3 independent zones, each with its own stereo + mono subwoofer RCA outputs (external amplification required for preamp outputs)
• Preouts: Up to 4 V RMS (Relative/Absolute); fixed mode selectable 4 V / 2 V / 1 V RMS
• Sources: AM/FM (RDS) and DAB+ (region dependent), Bluetooth® streaming, USB audio, AUX (RCA)
• Bluetooth®: A2DP/AVRCP with Qualcomm® aptX™ audio support; range up to 35 ft (11 m)
• USB: USB 2.0, 1 A device charging; supports MP3, MP4, WAV, AAC, M4A, M4B
• NMEA 2000®: Certified, Micro-C connector (LEN 1) for network/MFD integration
• Dimensions: 4.65 in W × 3.74 in H × 3.66 in D; cutout: 3.74 in W × 3.15 in H

Compatible JL Audio accessories (sold separately)

• MediaMaster® MMR-40 network controller
• MediaMaster® MMR-5N2K network volume controller
• MMA-1-HTML MFD data interface for MediaMaster® MM55/MM55-HR (NMEA 2000® integration)

Before ordering: confirm ratings, specifications, cutout size and system compatibility (amplifier loading/impedance, zone configuration and NMEA 2000® networking) for your installation.