JL Audio MMR-40 Full-Function Wired NMEA 2000® Network Controller f/MediaMaster®
$299.99 $269.99
MMR-40 Full-Function Wired NMEA 2000® Network Controller for MediaMaster®
The MMR-40 is an NMEA 2000® Network Controller engineered to add full-function, auxiliary control to MediaMaster® source units.
Outfitted with an NMEA 2000® Micro-C connector, the MMR-40 connects to a host MediaMaster® source unit in two ways:
- Direct interface with a vessel’s NMEA 2000® network using applicable NMEA 2000® cables and connectors (not included)
- Direct connection of one MMR-40 with one host MediaMaster® source unit using MMC-PN2K powered network cables (sold separately) to simulate an isolated, stand-alone NMEA 2000® network
Once connected, the MMR-40 automatically recognizes the host MediaMaster® source unit and will then mirror all host source unit controls and screen info onto the MMR-40’s full-color, 2.8-inch LCD, resulting in a complete MediaMaster® user experience.
The MMR-40 is equipped with an independent display theme and lighting controls for maximum mounting location flexibility, regardless of the settings on the host source unit. Engineered for real-world marine (and many outdoor) applications, its weatherproof (IP66-rated) chassis is built to withstand the harshest environments.
The MMR-40 includes the following features:
- NMEA 2000® Certified (LEN 4)
- Easy-to-read, high-brightness, 2.8-inch full-color LCD with large backlit controls
- Independent day/night display themes and lighting controls
- IP66 rated for real marine duty
- Protective Sun Cover included
Note: The MMR-40 is not a stand-alone receiver and does not function without a connected MediaMaster® source unit. All remote control functionality of the MMR-40 is solely derived from the host source unit. Functionality of the MMR-40 requires connection to a NMEA 2000® network or use of MMC-PN2K powered network cables (sold separately).


⚓ Smooth Sailing Shipping
Enjoy FREE standard shipping on most orders over $250 within the continental U.S. (excl. heavy/oversized/hazardous items).
We ship via UPS, FedEx, and USPS . Orders are processed in 1–2 business days with typical delivery in 1–5 business days .
🧭 Track The Voyage
You’ll receive tracking info by email once your order ships. If your package is marked “delivered” but not received, please wait 48 hours then reach out to our team.
🛟 Hassle-Free Returns & Exchanges
Returns accepted within 30 days of delivery. Items must be unused and in original packaging.
- Mistaken or damaged cargo? We’ll handle return shipping.
- Changed your course? Return shipping is on you.
- Report defects or damage within 7 days for a free exchange.
💰 Anchor Your Refund
Refunds go back to your original payment method within 5–7 business days after inspection.
📨 Contact the Crew
Questions about your order? Drop anchor at sales@marineelec.com .