Bluetooth Source Units

  • N2-WBT
  • GMR-3

MB Quart offers several solutions to put music into an audio system. New this year is GMR-3. The newest and most technically advanced AM/FM Source Unit ever conceived, by the MB Quart engineering team.


The MB Quart Nautic GMR Marine & Powersports source units are the perfect solution for any vehicle that will be exposed to the elements. The GMR line has been extensively tested to be waterproof, dust proof and UV stable.



For applications where you only need the Bluetooth controller, check out the new switch mounted N2-WBT. Joy stick controls make it perfect to slip into an available accessory switch in a dash. Pre-amp outputs make it the perfect solution for off road vehicles, boat or custom car builds.


To create the perfect system choose from the following MB Quart categories to power your system:
All MB Quart Nautic amplifiers are ABYC & ASTM certified which defines that marine amplifiers must use conformal coated PC boards to resist corrosion from salt spray & moisture.



GMR-3 Source Unit

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Marine Bluetooth Source Unit

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  • Marine Bluetooth Source Unit
  • Marine Bluetooth Source Unit
  • Marine Bluetooth Source Unit

GMR-3 Source Unit

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Part#: GMR-3


180 watt powered Bluetooth AM/FM gauge mount radio with Carbon Fiber look



MB Quart GMR-3, Bluetooth AM/FM gauge mount radio featuring Apple control which brings more control between your Apple devices. Internal 4 channel amplifier delivers 180 watts, including aux input and pre-amp outputs.

Category: Bluetooth Source Units
SKU: 806576227434
Part #: GMR-3

  • Tuner Section FM Stereo Frequency Range
  • Tuner Section S/N Ratio
  • Bluetooth Range
    32' - 10 Meter
  • RMS Power Output
    20 x 4
  • Peak Power Output
    40 x 4
  • S/N @1W
  • Frequency Response(Aux In)
    85Hz - 20kHZ
  • Pre-amp Outputs (Y/N #)
    2pr - Front/Rear
  • Pre-amp Voltage
  • Display Type
  • Display Backlit
  • LCD Font Size
  • Minimum Impedance
  • Dimensions Mounting Hole
    3" - 7.6 cm
  • Dimensions Mounting Depth
    3.75" - 9.5 cm
  • Dimensions Mounting Bezel (Width x Height x Depth)
    4.15" - 10.5 cm
  • Product Weight
    1.5 lbs (0.6 kg)

Features & Benefits
  • Marine Grade Protection: Yes
    Meets or excceds the American Boat and Yacht Council (ABYC) marine electronics standards and the American Society for Testing and Materials (ASTM)
  • Life Shield: Yes
    This product has been designed and tested against the elements. Waterproof, dust proof, snow proof or shock proof. Built to handle the outdoors.
  • Apple Control: Yes
    Quick control and access of iTunes collection with iPhone, iPod and iPad
  • Source Type: AM/FM/Bluetooth Enabled Gauge Mount Radio
    Allows all access to radio stations and content from Bluetooth enabled devices.
  • Input Types: Bluetooth, RCA, USB
    Nearly nothing the device can not play. Cassettes and 8-tracks not withstanding
  • Control Buttons: Large & Waterproof
    Play/Pause, Tracks Forward/Back, Volume Up/Down and Power On/Off are all protected from the elements with the large waterproof button. Their size and space also makes them easy to operate with riding gloves on.
  • Bluetooth™ Connect: YES
    Bluetooth™ Connect allows your phone or other Bluetooth enabled device to be quickly paired to the controller without a complicated pairing process.
  • Secure Simple Pairing™: YES
    Quick and secure wireless connection between your Bluetooth enabled device and the Polaris Controller. This reliable connection is impervious to outside interference, providing a lock-tight connection to your audio system.
  • Quick-Pair™: YES
    No more frustration with trying to pair. When the unit powers up, it immediately connects to the last device connected. For a first time connection, you only have to select "MB Quart" from your Bluetooth menu and you are connected, QUICKLY.
  • Remote Output: YES
    Control up to 2, GMR-WDR wired remotes with the GMR-3 positioned at the captains seat and run remotes to the swim deck and the bow.
  • Built-In Power: YES
    Four channels with 40 watts of output. These channels remain active when running external amplifiers (RCA Output) to run additional speakers in the cabin.
  • Additional Inputs:
    1 pair RCA (AUX)

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