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MB Quart GMR-1.5W 160W Digital Media Marine Receiver with Bluetooth, Black

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MB Quart GMR-1.5B Nautic 160 Watt Marine Multimedia Source Unit IPX67

Introducing the MB Quart GMR-1.5B, an exceptional Off-Road & Marine Multimedia Source Unit designed to enhance your audio experience in any outdoor adventure. With a powerful 160 Watt internal amplifier, this unit delivers impressive sound quality and performance, making it a perfect companion for your off-road vehicles, marine vessels, powersports vehicles, and RVs.

Weighing just 1.85 lbs, the MB Quart GMR-1.5B features compact dimensions of 5.95 × 5.95 × 6.82 inches, allowing for easy installation and a seamless fit in various applications. Its sleek black design adds a touch of style to your setup, while the durable construction ensures long-lasting performance even in demanding environments.

The GMR-1.5B belongs to the renowned Nautic series by MB Quart, a brand known for its exceptional audio solutions in the marine and powersports industry. With its IPX67 rating, this unit is fully protected against water and dust, making it an ideal choice for outdoor enthusiasts seeking reliable performance.

Key Features:

  • Bluetooth Connectivity: Enjoy wireless freedom with the built-in Bluetooth feature. With a range of 32 feet, you can effortlessly connect your Bluetooth-enabled devices to the source unit, allowing you to stream your favorite music, podcasts, or audiobooks while on the go.

  • High Power Output: The GMR-1.5B boasts a robust internal amplifier with a peak power output of 4 x 40 watts and an RMS power output of 4 x 20 watts. This ensures powerful and clear audio delivery, filling your outdoor space with immersive sound.

  • Versatile Input Options: This source unit offers multiple input options, including Bluetooth, RCA, and USB connections. Whether you prefer a wired or wireless connection, you can easily connect your devices and enjoy your preferred audio content.

  • Preamp Outputs: The unit features 1 subwoofer output, allowing you to expand your audio system with additional subwoofers for enhanced bass response. The preamp voltage of 4.0V ensures optimal signal strength and clarity.

  • User-Friendly Controls: The GMR-1.5B is equipped with a master knob and 9 control buttons on the faceplate, providing convenient and easy access to your audio settings. Adjust volume, change tracks, and navigate menus with simplicity.

  • Marine-Grade Protection: Designed to withstand the elements, this unit meets or exceeds IPX67 requirements for water and dust resistance. It is built to handle the toughest outdoor conditions, ensuring durability and reliability throughout your adventures.

  • Apple® Control: Seamlessly control your favorite music apps via iPhone, iPod, or iPad, allowing for quick and easy access to your music library while on the move.

  • Additional Inputs: The GMR-1.5B offers 1 pair of auxiliary inputs and 1 USB port, providing flexibility in connecting external devices such as MP3 players or USB drives.

  • Quick and Secure Pairing: The Secure Simple Pairing™ feature ensures a quick and secure wireless connection between your Bluetooth-enabled device and the unit. The Quick-Pair™ function allows for effortless pairing with the last connected device or quick connection to the MB Quart device.

  • Built-In Power and Control: With four channels of output, the GMR-1.5B delivers ample power to your speakers, even when running an external amplifier. The unit's control method, consisting of a master knob and control buttons, ensures convenient operation and customization.

Enjoy the ultimate audio experience with the MB Quart GMR-1.5B Off-Road & Marine Multimedia Source Unit. With its exceptional features, rugged construction, versatile connectivity options, and intuitive controls, this source unit is the perfect addition to your outdoor adventures.


  • Compatible Vehicle Fitment: Universal
  • Marine Grade Protection / IPX Rating: This product has been designed and tested against the elements. Waterproof, dustproof, snowproof or shockproof. Built to handle the outdoors. Meets or exceeds IP67 requirements for water and dust proofing.
  • Apple® Control: Quick control and access of music apps via iPhone, iPod and iPad.
  • Source Type: Bluetooth® Enabled Gauge Mount Radio allows all access to content from Bluetooth enabled devices.
  • Input Types: Bluetooth, RCA, USB
  • Control Buttons: Unit is adjusted by master knob and 9 control buttons on faceplate.
  • Bluetooth® Connect: 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™: Quick and secure wireless connection between your Bluetooth enabled device. This reliable connection is impervious to outside interference, providing a lock-tight connection to your audio system.
  • Quick-Pair™: 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.
  • Built-In Power: Four channels of output. These channels remain active when running an external amplifier (RCA Output) to run additional subwoofer in the vehicle.
  • Control Method: Unit is adjusted by master knob and 9 control buttons on faceplate.
  • Additional Inputs: 1 Pair (Aux), 1 USB
  • USB / Apple® / Charging Port: 1 USB
  • Bluetooth® Version: Version 4.0


  • Weight: 1.85 lbs
  • Dimensions: 5.95 × 5.95 × 6.82 in
  • Type: Source Unit
  • Brand: MB Quart
  • Series: Nautic
  • Category: Marine, Powersports, RV
  • Condition: New
  • Color: Black
  • Warranty: 1 Year
  • IPX Rating: IPX67
  • Compatible Vehicles: Universal
  • Source Unit Bluetooth Range (ft): 32
  • Source Unit RMS Power Output (watts): 4 x 20
  • Source Unit Peak Power Output (watts): 4 x 40
  • Source Unit Pre-amp Outputs (Y/N #): 1 Subwoofer Out, Yes
  • Source Unit Pre-amp Voltage: 4.0V
  • Source Unit Minimum Impedance (ohms): 4
  • Source Unit Dimensions Mounting Hole (in): 2.99
  • Source Unit Dimensions Total Mounting Depth (in): 3.14
  • Source Unit Dimensions Mounting Bezel (Round) (in): 4.75
  • Proposition 65 Notice: WARNING: Cancer and Reproductive Harm -