MB Quart Polaris Off-Road Grade Audio

Bluetooth Source Units

  • GMR-2.5
  • 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-2 Nautic Source Unit

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MB Quart GMR-2 Blutooth Source Unit

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Availability: Discontinued

Part#: GMR-2


Bluetooth enabled gauge mount radio with remote output for up to two remotes

Coming Soon!


Part #: GMR-2 | SKU: 806576223498 | Category: Bluetooth Source Units
The GMR-2 Marine and Powersports source unit feature Apple control which brings more control between your Apple devices. The GMR-2 will accommodate up to 2 GMRWDR wired remote controls.

Coming Soon!


Part #: GMR-2 | SKU: 806576223498 | Category: Bluetooth Source Units
  • 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 #)
    Y - 1pr
  • Pre-amp Voltage
  • Display Type
  • Display Backlit
  • Optional Remotes
    Up to 2 Remotes
  • Minimum Impedance
  • Dimensions Mounting Hole
    3.12" (7.93cm)
  • Dimensions Mounting Depth
    2.87" (7.30cm)
  • Weight
    1.5lbs (0.6K)


Part #: GMR-2 | SKU: 806576223498 | Category: Bluetooth Source Units
  • Source Type
    AM/FM/Bluetooth Enabled Gauge Mount Radio
  • Input Types
    Bluetooth, RCA, USB
  • Control Buttons
    Large, Waterproof - Play/Pause, Tracks Forward/Back, Volume Up/Down and Power On/Off
  • Bluetooth™ Connect
    Bluetooth™ Connect allows your phone or other Bluetooth enabled device to be quickly paired to the controller without a complicated pairing process
  • Built-In Power
    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)


Part #: GMR-2 | SKU: 806576223498 | Category: Bluetooth Source Units
More info in development & coming soon!


Part #: GMR-2 | SKU: 806576223498 | Category: Bluetooth Source Units
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Maxxsonics Factory Specials
Maxxsonics Factory Specials