Marine stereo source MM55-HR ($/VNDR)

A hidden marine stereo source like the JL Audio MM55-HR is designed to be installed discreetly, often out of sight, to minimize clutter at the helm or in other visible areas of the boat. The main unit is typically installed in a dry, protected location, while control is handled via compatible external interfaces.

Controlling the MM55-HR stereo source requires connection to a compatible device. You can control it via:

A compatible NMEA 2000® device (not included), using NMEA 2000® cables and connectors (sold separately).A MediaMaster® MMR-40 network controller (sold separately).A compatible multifunction display (MFD) using an MMA-1-HTML MFD data interface (sold separately).

The JL Audio MM55-HR unit is water-resistant. However, it must not be submerged or exposed to high-pressure water jets. It is recommended to install it in a dry, well-ventilated location. If a completely dry environment is not available, a spot shielded from heavy splashing may be used.

The JL Audio MM55-HR must only be used in vehicles or boats with 12-volt electrical systems featuring a negative ground. It is not certified or approved for use in aircraft.

The MM55-HR offers several audio connectivity options:

A USB input (1A) for media playback or charging.
An auxiliary stereo input (AUX-IN).
Pre-amplified outputs for three audio zones (left, right, and subwoofer for each zone).
Speaker outputs for zone 1 (stereo) and zone 2 (stereo).

Yes, the MM55-HR supports Bluetooth connectivity for audio streaming. It also features a dedicated Bluetooth pairing mode for mobile app controllers.

Yes, the JL Audio MM55-HR is equipped with an antenna input for AM/FM and DAB+ tuners.

Yes, professional installation is recommended for the JL Audio MM55-HR. Installation requires appropriate tools and safety equipment.

The MM55-HR can connect directly to a boat’s NMEA 2000® network via a Micro-C port (cables and connectors sold separately). This connection allows control of the unit through compatible NMEA 2000® devices, though functionality may require specific PGN protocols and potentially a software update on your multifunction display (MFD).

The USB port on the JL Audio MM55-HR provides a 1 amp (1A) output, allowing it to charge small devices or play audio files from compatible USB devices.

The JL Audio MM55-HR can handle up to three separate audio zones, each with pre-amplified outputs for left, right, and subwoofer channels.

The unit requires a 15 amp (15A) fuse for power. It is critical never to replace it with a fuse of a different rating or bypass it.

Yes, before cutting or drilling, always check that there are no obstacles behind the mounting surfaces. Securely install the product to prevent damage or injury in rough conditions. Carefully route all system cables away from moving parts and sharp edges, and secure them with cable ties or clamps.

No, the JL Audio MM55-HR is not certified or approved for use in aircraft. It is designed for 12-volt negative-ground electrical systems in vehicles and boats.

The MM55-HR has a standard antenna input compatible with AM/FM and DAB+ antennas.

Before installation, it is imperative to turn off the audio system and disconnect the battery system from the audio system. Use this product only in vehicles with 12-volt negative-ground electrical systems.

In accordance with FCC and Canadian regulations, this equipment must be installed and used with a minimum distance of 20 cm maintained between the radiator and any part of your body to comply with RF radiation exposure limits.

Yes, the JL Audio MM55-HR supports Bluetooth pairing specifically for mobile app controllers, allowing you to control it from your smartphone or tablet via a dedicated app (if provided by the manufacturer).

The auxiliary input (AUX-IN) allows you to connect external analog audio sources, such as an MP3 player, smartphone, or any other device with a headphone output, to play their sound through the MM55-HR system.