Boss Audio Systems MGR350B

Questions and Answers

L
lreyesJul 27, 2025
What to do if Boss Audio Systems MGR350B has no sound?
- M
  Melissa WrightJul 27, 2025
  If you're not getting any sound from your Boss Audio Systems Radio, there are a few things to check: * Make sure the volume isn't set too low or muted. If it is, increase the volume. * If a speaker is blown, replace the faulty speaker. * Also, verify that the device isn't paused or muted. Check the device's playing and volume status.
P
Peter JonesAug 2, 2025
How to fix Boss Audio Systems Radio that will not turn on?
- R
  Raymond HaydenAug 3, 2025
  If your Boss Audio Systems Radio isn't turning on, the issue might be: * A blown fuse. Check and replace the fuse if necessary. * The ignition not being engaged. Turn the ignition to the 'on' position.
K
Katherine McclureAug 9, 2025
What to do if Boss Audio Systems MGR350B Radio becomes unresponsive?
- S
  simsmaryAug 9, 2025
  If your Boss Audio Systems Radio becomes unresponsive, it could be due to a few reasons: * A power glitch or interference. Disconnect the power for 10 seconds to reset the unit. * Low battery power. Charge the battery or run the engine to recharge it.
J
James BellAug 14, 2025
Why is Bluetooth pairing failing on my Boss Audio Systems MGR350B Radio?
- J
  Joseph AndersonAug 14, 2025
  Bluetooth pairing issues with your Boss Audio Systems Radio can occur if: * The Bluetooth function of the device is not enabled. * The MGR350B BT memory is full.
J
Jordan HendersonAug 20, 2025
Why is the audio quality poor when using Bluetooth on my Boss Audio Systems MGR350B?
- J
  James WilliamsAug 20, 2025
  Poor audio quality over Bluetooth on your Boss Audio Systems Radio might be due to poor Bluetooth reception. Try moving the device closer to the audio system or removing any obstacles between the device and the system's antenna.

Summary

Bluetooth Connectivity

Pairing New Bluetooth Devices

Step-by-step guide for connecting your phone or audio device via Bluetooth.

Troubleshooting and Specifications

Troubleshooting Common Issues

Guide to resolving common problems like no sound, Bluetooth pairing, or unit unresponsiveness.

Product Specifications

Detailed technical specifications for tuner, amplifier, Bluetooth, USB, and general components.

Limited Warranty Information

Obtaining Warranty Service

Steps and requirements for sending the product for warranty repair or replacement.

Summary

Bluetooth Connectivity

Pairing New Bluetooth Devices

Step-by-step guide for connecting your phone or audio device via Bluetooth.

Troubleshooting and Specifications

Troubleshooting Common Issues

Guide to resolving common problems like no sound, Bluetooth pairing, or unit unresponsiveness.

Product Specifications

Detailed technical specifications for tuner, amplifier, Bluetooth, USB, and general components.

Limited Warranty Information

Obtaining Warranty Service

Steps and requirements for sending the product for warranty repair or replacement.

The device described in the manual is the BOSS Audio Systems MGR350B Bluetooth Gauge Hole Radio. It is a marine-grade audio system designed for installation in a standard gauge hole, featuring Bluetooth connectivity for audio streaming.

Function Description

The MGR350B is a compact, fully marinized gauge hole radio that offers multiple audio sources and control options. Its primary function is to provide audio entertainment in marine environments or other applications where a durable, weather-resistant radio is needed.

Key Functions:

Bluetooth® Enabled: Allows wireless audio streaming from Bluetooth-enabled devices such as smartphones and tablets. It supports A2DP/AVRCP 1.3 profiles.
AM/FM Tuner: Features a built-in radio tuner with preset stations for both AM and FM bands. It includes RDS (Radio Data System) functionality for displaying station information.
USB Playback: Supports playback of MP3 and WMA audio files from USB drives (up to 32GB/FAT32, 65,000 songs). The USB port also provides 5VDC @ 1A for charging devices.
AUX Input: Includes a 3.5mm auxiliary input for connecting external audio devices via a wired connection.
Audio Control: Offers comprehensive audio adjustments including EQ (Flat, Jazz, Pop, Class, Rock, Tecan, Local, User), XBASS On/Off, Bass Level, Mid Level, Treble Level, Balance, Fader, Rearout, Subwoofer settings (Line Out, On/Off, LPF 80Hz/120Hz/160Hz, Level 00-12).
System Settings: Allows configuration of system-level features such as Bluetooth reconnect/disconnect, BEEP sound On/Off, factory reset, and viewing device information (hardware/software versions).
Zero Standby Current Drain: A notable feature for marine applications, ensuring minimal power consumption when the unit is off, thus preserving battery life.

Important Technical Specifications

General:

Power Source: 14.4VDC (10.8V ~ 16V allowable)
Grounding System: Negative type
Maximum Current Consumption: 15A
Protection Circuitry: 3-way (thermal, overload, and speaker short protection)
Unit Weight: 1.08lbs / 0.52kg
Storage Temperature: -22°F to 176°F / -30°C to 80°C
Operation Temperature: -4°F to 158°F / -20°C to 70°C
Replacement Fuse: 15A (ATG Fuse Type Only)
Dimensions: 92.2mm (Rubber) / 90mm (Plastic) diameter, 75mm depth, 76mm mounting hole diameter.

Integrated Amplifier (MOSFET):

MAX Continuous Output: 240W (All channels driven)
PEAK Power Rating: 60W / channel
RMS Total Power Output: 80W
Channels: 4
Class: AB
Frequency Response: 20-20kHz
Speaker Impedance: 4Ω stable

FM Tuner:

Frequency Range:
- USA: 87.5~107.9MHz
- Europe, Asia, Australia: 87.5~108MHz
Usable Sensitivity: 12dB (S/N=30dB)
Bands: 2

AM Tuner:

Frequency Range:
- USA: 530~1710KHz
- Europe, Asia, Australia: 522~1620KHz
Usable Sensitivity: 40dB (S/N=20dB)
Bands: 1

Weather Band:

Channels: 7 (162.400MHz to 162.550MHz)
Bands: 1

Bluetooth:

Version: BT 3.0
Range: 33Ft / 10M (Class 2)
Profiles: A2DP / AVRCP 1.3

USB Drive Media Supported:

File Types: MP3, WMA
Capacity: Up to 65,000 Songs, 32GB / FAT32
Speed: USB 2.0 High Speed
Output Voltage: 5VDC @ 1A (for charging only; media playback not supported for cell phones and iPods via charging port)

Chassis:

Button Backlight Illumination: BLUE LED
F/R/S RCA Preamp Output: 2VRMS
RCA Input Impedance: 10KΩ
LCD: TN Type / Active Matrix

Usage Features

Quick Installation: Designed for easy installation into a standard gauge hole (3.00" / 76mm cutout). Includes metal bracket, hexagon mounting studs, and M4 secure nuts.
User-Friendly Interface: Intuitive button layout for source selection (SRC), volume control (VOL), band selection (BAND), track/seek (K, ►►I), play/pause (►/II), and menu navigation (MENU, DISP ENTER).
Mute Function: Quick press of the ►/II button to mute/unmute audio.
Auto Seek/Store: In Tuner mode, press and hold K or ►►I for Auto Seek. Press and hold PRESET to access Auto Store, which automatically saves the strongest stations.
Manual Store: Allows users to manually save desired radio stations to presets.
RDS On/Off: Enables or disables the Radio Data System feature.
AF (Alternative Frequencies) On/Off: When enabled, the unit automatically searches for a stronger signal with the same program identification.
TA (Traffic Announcement) On/Off: When enabled, the unit automatically switches to tuner mode to broadcast traffic announcements.
PTY (Program Type) Selection: Allows users to search for radio stations by program type (e.g., POP M, ROCK M, NEWS, SPORT, etc.).
Bluetooth Pairing: Simple pairing process with a 2-minute window for discovery. Passcode "0000" if prompted. Automatic reconnection to the last paired device. Manual reconnection via the MENU button if not the last paired device.
ID3 Tag Display: For USB and Bluetooth sources, the DISP ENTER button displays ID3 information (song title, artist, album).
Weather Resistant (IPX6): Designed to withstand harsh marine environments, though not intended for submersion.

Maintenance Features

Fuse Replacement: Specifies a 15A ATG type fuse for replacement.
Troubleshooting Guide: Provides solutions for common issues such as no power, no sound, Bluetooth pairing problems, and poor audio quality.
Reset Function: A system menu option to restore factory default settings.
Technical Support: Contact information (phone and website) for assistance.
Warranty: One-year manufacturer's warranty against defects, with an option for extended warranty upon registration. Requires a Return Authorization (RA#) for service.
Cleaning: Advises against using abrasive cleaning materials on the lens or bezel.
Battery Preservation: Features "Zero Standby Current Drain" and a warning to run the vehicle's engine when using the product to avoid battery exhaustion.

The MGR350B is a robust and feature-rich audio system tailored for marine and outdoor enthusiasts, combining modern connectivity with durable design.