JL Audio MBT-CRXv3 Marine-Rated Bluetooth Adapter (010-03378-00)

• Designed specifically for marine, motorsports and rugged outdoor applications, this compact controller/receiver brings high-quality streaming to boats, side-by-sides, motorcycles, golf carts and utility vehicles. 
• Built with a sealed, IP67-rated chassis, it stands up against dust, salt-spray, UV exposure and heavy vibration — ideal for open-deck, open-trail or exposed vehicle installations. 
• Boasts Bluetooth® 5.0 connectivity paired with the premium Qualcomm® aptX™ HD codec, delivering CD-quality wireless audio from compatible devices with minimal latency and enhanced fidelity. 
• Offers dual-zone control: two stereo 4-volt RMS preamp outputs (Zone 1 & Zone 2) plus a dedicated mono subwoofer output, giving you full control of separate speakers or zones with independent volume offsets and LED-color indicators. 
• Ideal for either stand-alone use as your source unit or as an add-on to an existing audio system — just mount the unit using a single hole, wire it in, and pair your device. Large backlit controls allow easy operation day or night, even in gloved-hand or wet-weather conditions.
• Up to 35 ft (11 meters) of wireless range in line-of-sight gives flexibility in where you mount the unit relative to your Bluetooth streaming device. 
• Physical dimensions and install flexibility: front-panel diameter approx. 2.285″ with cut-out 1.70″, mounting depth ~3.0″. Includes adapter plate for flush front-mounting where rear access is limited. 
• Includes a +12 V (1 amp) remote turn-on output to control downstream amplifiers or power units, simplifying integration into complex systems. 
• What’s in the box: the receiver/controller with attached 13″ RCA output leads and 21″ power/ground/remote wires (with in-line 2A fuse), two receiver gaskets (one installed), locking collar, mounting plate and gasket, four 5/8″ screws, instruction manual and warranty information.
• Covered by a 2-year warranty through the manufacturer’s electronics branch, giving peace of mind for harsh outdoor use. 

Why this matters: In high-moisture, high-vibration environments such as marine decks or powersports vehicles, typical audio receivers struggle. The MBT-CRXv3 stands out by combining premium wireless audio playback (aptX HD) with rugged durability and flexible zone control.

Whether you’re controlling a wake-boat’s cockpit speakers + tower speakers or outfitting a UTV with front and rear zones, this unit provides the streaming source and control interface without needing a traditional head unit. The backlit interface, color-coded LED zone indicators and minimal footprint make it ideal for custom install scenarios.

Use-case suggestions:

• Install in a center console of a fiberglass boat; mount front-facing for easy control in sunlight, run Zone 1 to cockpit speakers and Zone 2 to tower speakers, sub-out to a wake-sub amplifier.
• Mount on a motorcycle fairing or ATV dash: just one hole needed, use the included adapter plate, pair your phone, start riding — no legacy stereo required.
• Retro-fit into a golf cart or off-road vehicle: add the MBT-CRXv3 as a dedicated source to your sound system, stream music wirelessly, and control multiple zones (front vs rear passengers).
• Use as part of a marine audio upgrade: hide the streaming device, and let the controller handle source and zone management while the heavy-lifting amplifiers handle power to the speakers.

Installation / Integration Tips:

• Ensure the unit is mounted where the front panel remains accessible and visible for best control — the large backlit buttons are designed for intuitive use while underway.
• Use shielded RCA cables for the preamp outputs to minimize noise in marine environments.
• If integrating existing amplifiers, use the remote turn-on lead (+12 V) to signal them when the MBT-CRXv3 powers up.
• Because it supports two independent zones, label your wiring appropriately (Zone 1, Zone 2, Sub) so users know which LED color corresponds to which output.
• Maintain good Bluetooth line-of-sight when practical to maximize the 35 ft range; watercraft or vehicles with metal cabins can reduce range under real-world conditions. 
• For marine use, ensure the mounting location has good drainage and no standing water; even though the chassis is water-resistant (IP67), good wiring practices (sealed connections, dielectric grease) help durability.

Seamless Integration with Existing Systems: The MBT-CRXv3 is purpose-built to add Bluetooth streaming to virtually any audio system — no need to replace your amplifier or speakers.

Pair any A2DP Bluetooth device (phone/tablet), stream your playlists, and use the controller as the interface. The preamp outputs (4 V RMS) mean it can drive amplifiers or input into existing source units with aux/line-level inputs.

MBTCRXv3 (0100337800)