GMR-2.5 Nautic 160 Watt Powered Source Unit

MB Quart 160 Watt Powered Bluetooth AM/FM Gauge Mount Radio with Carbon Fiber Look.

$ 219.99
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SKU: 806576228011 Categories: ,

MB Quart GMR-2.5, Bluetooth AM/FM gauge mount radio features Apple® control which brings more control between your Apple devices. Internal 4 channel amplifier delivers 160 watts, including aux input and pre-amp outputs.

Weight 1.9 lbs

Source Unit


MB Quart




Marine, Powersports





Crutchfield Available


Crutchfield Link


1 Year

IPX Rating


Source Unit Tuner Section FM Stereo Frequency Range


Source Unit Tuner Section S/N Ratio

> 55dB

Source Unit Bluetooth Range (ft)


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 Pair RCA, Yes

Source Unit Pre-amp Voltage


Source Unit Minimum Impedance (ohms)


Source Unit Display Type


Source Unit Display Backlit


Source Unit LCD Font Size


Source Unit Dimensions Mounting Hole (in)


Source Unit Dimensions Total Mounting Depth (in)


Source Unit Dimensions Mounting Bezel (Round) (in)


Additional Details MAXIMUM THD+N AT 4 OHMS: 0.00013, EFFECIENCY AT FULL POWER 4 OHM (1KHZ): 0.618, IDLE CURRENT: 0.3A, SIGNAL TO NOISE (CTA-2006B): Bluetooth -78.1 dBa / Aux -86.7 dBa, SIGNAL TO NOISE RATIO OF LINE LEVEL OUTPUTS (AT MAX VOLUME): Bluetooth -78.2 dBa / Aux -87.1 dBa, PREAMP FREQUENCY RESPONSE (+/- 3.0DB): Bluetooth 20Hz-20KHz / Aux 20Hz-20KHz, AMPLIFIER FREQUENCY RESPONSE (+/- 3.0DB): Bluetooth 20Hz-20KHz / Aux 20Hz-20KHz, STEREO SEPARATION (AUX INPUT): -61.3dB @ 5kHz, FM MONO USABLE SENSITIVITY: 13.2dBf / 2.4μV, AM MONO USABLE SENSITIVITY: 14 - 16μV
Proposition 65 Notice ​WARNING: This product can expose you to chemicals including LEAD, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to
Marine Grade Protection / IPX Rating

Meets or excceds IPX67 requirments for water and dust proofing. LIFE SHIELD: This product has been designed and tested against the elements. Waterproof, dustproof, snowproof or shockproof. Built to handle the outdoors.

Apple® Control

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.

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

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.


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 with 40 watts of output. These channels remain active when running external amplifiers (RCA Output) to run additional speakers in the cabin.

Control Method

Large waterproof rubber buttons.

Frequency Range

FM: 87.5-108, AM: 530-1710

USB / Apple® / Charging Port

Rear access cable USB / Apple® Charging Port

Bluetooth® Version

Version 2.0

Main Connector Type

MOLEX connector for simple installation and removal of unit when needed.

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MB Quart Nautic Source Unit (GMR-2.5) Quick Start Guide (Rev4)