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.



Bluetooth Source Units

  1. GMR-3 Source Unit : AM/FM Bluetooth Controller - Powered

    180 watt powered Bluetooth AM/FM gauge mount radio with Carbon Fiber look ⇒ Details & Images

  2. GMR-2.5 Source Unit : AM/FM Waterproof Bluetooth Controller - Powered

    MB Quart 160 Watt Powered Bluetooth AM/FM Gauge Mount Radio with Carbon Fiber Look. 160 Watts x 4 Channels 10 meter/32 foot Bluetooth Range Line output, 2 volts ⇒ Details & Images
  3. GMR-2 Nautic Source Unit : bluetooth radio w/ remote-out

    Bluetooth enabled gauge mount radio with remote output for up to two remotes ⇒ Details & Images


  4. PSAP-2S Accessory Plug : USB/3.5mm inputs, switch mounted

    MB Quart PSAP-2S Switch Mounted, USB / 3.5mm Dual Input Waterproof Powersports Auxiliary Plug with 10 Inch USB and RCA Extension. ⇒ Details & Images
  5. PSAP-2 Accessory Plug : USB/3.5mm inputs, dash mounted

    Waterproof dash mounted USB and 3.5mm input with RCA and USB extension cable. ⇒ Details & Images
Maxxsonics Factory Specials
Maxxsonics Factory Specials