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Boating is better with music. The MB Quart GMR-LED marine stereo transforms your watercraft into a floating soundstage. Compact, rugged, and beautiful, it blends premium sound performance with stunning LED visuals. Designed for outdoor elements, the GMR-LED ensures your music keeps flowing no matter the conditions.
From casual cruises to full-on lake parties, this unit brings clarity, bass, and versatility. Whether on a jet ski, fishing boat, or pontoon, the GMR-LED is a fantastic centerpiece for any marine sound system.
This marine stereo thrives in wet environments. It's IPX5-rated, so you get peace of mind during splashes or downpours. The sealed buttons and weather-resistant faceplate stand up to rain, salt, and sun.
Fully waterproof housing and faceplate
UV-protected components resist long-term sun exposure
Corrosion-resistant connectors and hardware
No more worrying about damage from unexpected weather. The GMR-LED works reliably in tough marine settings.
MB Quart gives you all the connectivity you need without clutter. Bluetooth lets you stream wirelessly from any mobile device. Plug in a USB drive or AUX cable for direct input. You’ll enjoy consistent, interference-free performance every time.
Bluetooth audio streaming with full control
USB and AUX inputs for multiple source options
AM/FM and NOAA weather band for real-time updates
Whether you're relaxing in the bay or out on deep water, you’ll stay connected to your favorite tunes.
What really sets this marine stereo apart is the vibrant LED-backlit display. It offers day or night readability while giving your dash some color. The backlight isn't just for show—it helps visibility in low light and at sea.
Customizable LED color options
Large, backlit buttons for easy use
Daylight-readable LCD screen
Add personality to your marine setup with bright lighting that reflects your vibe.
On the water, sound clarity is essential. The MB Quart GMR-LED marine stereo features 4x40-watt power output. That’s enough to blast high-quality audio through your speakers—even over wind and waves.
40 watts x 4 built-in amplifier
Preamp outputs for expansion
Clear, dynamic output with little distortion
You can also connect a marine amp for more power. Check out our marine stereo collection for compatible gear.
Installing the GMR-LED is straightforward. Its round gauge-style design makes it compatible with most boat dashboards. With a 3-inch cutout, it slides into standard openings without special tools.
Simple one-hole installation
Works with existing gauge holes
Plug-and-play wiring harness included
You’ll be up and running fast, whether upgrading or starting fresh.
The GMR-LED isn’t just for boats. Its rugged, waterproof build makes it perfect for powersports vehicles too. Use it on ATVs, UTVs, golf carts, or campers for full-throttle entertainment.
This stereo handles vibration, dirt, and moisture with ease.
The MB Quart GMR-LED supports external amps, subwoofers, and more. Using its 4V RCA pre-outs, you can scale your marine audio system however you like.
Want more bass? Add a sub. Want more coverage? Add zones. The GMR-LED can handle both.
The MB Quart GMR-LED offers premium features without overwhelming size or complexity. It’s sleek, waterproof, easy to use, and versatile. Perfect for new setups or as a smart upgrade.
Key Features Recap:
Bluetooth, USB, and AUX connectivity
IPX5-rated waterproof design
4x40W power output
LED backlit interface
Daylight-readable screen
Marine-rated durability
Explore our full range of marine stereos collection for the perfect audio companion on the water.
Need your car upgraded too? Check out this guide to car window tinting for added style and UV protection.
Have questions or need help choosing the right setup? Audio Jam is your local expert in all things marine audio.
📍 3720 Governor Printz Blvd, Wilmington, DE
📞 (302) 654-1151
🌐 audiojamonline.com
Q1: Can I use the GMR-LED with a marine amp?
Yes, it includes RCA outputs for adding external marine amplifiers.
Q2: Is the display readable in bright sunlight?
Absolutely. Its LCD display is engineered for daylight visibility.
Q3: Will this work on my ATV or UTV?
Yes. It’s ideal for any power sports vehicle with a 12V system.
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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I did receive my package in only a few days which was great. I have opened it and it is the complete kit. Hopefully when I have it installed it works as expected. If so it will have been a great shopping experience with, Audio Jam.
Shipping to took to long a week late
It didn’t work and no instructions included
I did receive my package in only a few days which was great. I have opened it and it is the complete kit. Hopefully when I have it installed it works as expected. If so it will have been a great shopping experience with, Audio Jam.
Good product
