Boss Audio MGR350B Leaflet

Page of 2
Make the mounting hole size as follows
 
3.00” / 76mm
1
2
Snap off break-away tabs to best fit 
your applications depth
Slip the unit through the hole cutout and into U-bracket
4
Install studs mounts into rear of chassis
5
3
Adjust M4 nuts for the best mounting depth
Firmly tighten remaining M4 nuts 
6
Secure and waterproof the wiring 
BLUETOOTH
®
 ENABLED
GAUGE HOLE RADIO
MGR350B
USER MANUAL
FEATURING ZERO
STANDBY CURRENT DRAIN
QUICK INSTALLATION GUIDE
MGR350B
USER MANUAL 
QUICK INSTALLATION GUIDE
BLUETOOTH
®
 GAUGE HOLE RADIO
PRINTED IN CHINA
VER:1.0 EN
0215
BOSS Audio Systems
3451 Lunar Court • Oxnard, CA 93030
www.bossaudio.com   |   1.805.751.4853
Tech Support: www.bossaudio.com/support
The Bluetooth® word mark and logos are registered trademarks 
owned by Bluetooth SIG, Inc. and any use of such marks is under 
license. Other trademarks and trade names are those of their
respective owners.
BEFORE YOU START
IMPORTANT SAFETY PRECAUTIONS
BE SURE TO OBSERVE THE FOLLOWING GUIDELINES:
• 
Do not turn up the volume so high that you can’t hear what’s 
around you.
 Use caution or temporarily discontinue use in potentially 
hazardous situations. 
 Do not operate mobile video equipment while driving a motorized 
vehicle – safe driving and safety consideration of others should 
always be your highest priority.
 Set your volume control at a low setting, then slowly increase the 
sound until you can hear it comfortably without distortion, or ear 
discomfort.
 In the event you should notice smoke, strange noises or odor from 
this product, or any other abnormal signs, immediately turn off the 
power and consult your dealer or the nearest authorized 
BOSS AUDIO Service Center
Using this product in this condition 
may result in permanent damage to the system.
WIRE DIAGRAM
Thank you for purchasing this
 
MGR350B Bluetooth Gauge Hole Radio
Please read thorough these instructions
carefully so you will know how to operate 
your model properly.
After you have finished reading the instructions, 
keep this document in a safe place 
for future reference. 
SUGGESTED MOUNTING METHODS
INFORMATION TO THE USER
TROUBLE SHOOTING GUIDE
!! WARNING !!
ADJUSTMENT OR ALTERATIONS OF THIS DEVICE MAY 
RESULT IN HAZARDOUS RADIATION EXPOSURE.
  
 
 
 
MGR350B
(1pc) 
Hexagon Mounting Studs
(2pcs)
M4 Secure Nuts
(8pcs) 
User Manual
 (1pc) 
Metal Bracket
(1pc)
BA
ND
SRC
FUNC
ME
NU
ENTER
DISP
VOL
VOL
50w x4
USB
Warranty Card
 (1pc) 
Facebook Card
 (1pc) 
THIS PACkAGE CONTAINS
White
Red
Yellow
Aux-In
Left
Right
Black
Grey
Subwoofer
Rear Line Out
Front Line Out
White
White
Red
Red
Left
Left
Right
Right
Antenna
Fuse Box
Left Rear Speaker (+)     Green
15A
Left Rear Speaker (-)     Green/Bl
ack
Left Front Speaker (+)     White
Left Front Speaker (-)     Whi
te/Black
Right Front Speaker (+)     Gray
Right Front Speaker (-)    Gray/Black
Right Rear Speaker (+)     Purpl
e
Right Rear Speaker (-)    Purple/Black
Accessory (+12V)    Red
Ground (-)    Black
Battery (+12V)    Yellow
Amp Remote (+12V)    Blue
1A
CHARGING MAX
Replace Fuse
with AGU
type only
BATTERY
20A
Fuse and Fuse Holder
(not included)
Chassis
ground
point
Battery Kill Switch
(not included)
OPTIONAL DIRECT BATTERY WIRING CIRCUIT
BLACK
Chassis
ground
point
Ground wire
Metal frame
Recommended
12 ~ 14ga 
Primary Wire
(not included)
15A
INSERT
USB
YOUR
USB CABLE
YOUR
ANTENNA
To avoid potential shorts in the electrical 
system, be sure to disconnect the (–) 
battery cable before installation. Use this 
unit with a 12-Volt battery and negative 
grounding only. Failure to do so may result 
in a fire or malfunction. 
When replacing the fuse, be sure to only use a 
fuse of the rating specified on this product. To 
avoid short-circuiting, cover any disconnected 
leads with insulating tape. It is specially impor-
tant to insulate any unused wires, which if left uncovered may cause a 
short circuit. When connecting other devices to this product, refer to 
the manual for the product to be connected. The black cable is ground, 
make sure to connect the ground wire first.
Ensure that the ground cable is properly connected to metal parts of 
the vehicles body frame or direct to the battery if your vehicle does not 
have a grounded chassis frame. The ground cable of this units power 
amp and a second powered system must be connected to the frame 
separately with different screws. If the screw for the ground wire 
loosens or falls out, it could result in fire or malfunction.
  
 
 
 
CAUTION!!
 
Do not ground or short the speaker leads
  
 
 
 
1-805-751-4853
www.bossaudio.com/support
TECHNICAL SUPPORT 
This device complies with part 15 of the FCC Rules. Operation is 
subject to the following two conditions: 
(1) this device may not cause interference, and 
(2) this device must accept any interference, including interference 
that may cause undesired operation of this device.
This transmitter must not be co-located or operated in conjunction 
with any other antenna or transmitter. The Bluetooth antenna cannot 
be removed (or replaced) by user. This equipment complies with 
FCC/ IC radiation exposure limits set forth for an uncontrolled 
environment and meets the FCC radio frequency (RF) Exposure 
Guidelines and RSS-102 of the IC radio frequency (RF) Exposure 
rules. This equipment has very low levels of RF energy that it 
deemed to comply without maximum permissive exposure 
evaluation (MPE). But it is desirable that it should be installed and 
operated keeping the radiator at least 20 cm or more away from 
person’s body (excluding extremities: hands, wrists, feet and 
ankles). Alteration or modifications carried out without appropriate 
authorization may invalidate the user’s right to operate the 
equipment. 
NOTE:
 
This equipment has been tested and found to comply with 
the limits for a Class B digital device, pursuant to Part 15 of the FCC 
Rules. These limits are designed to provide reasonable protection 
against harmful interference in a residential installation. This 
equipment generates, uses and can radiate radio frequency energy 
and, if not installed and used in accordance with the instructions, 
may cause harmful interference to radio communications. However, 
there is no guarantee that  interference will not occur in a particular 
installation. If this equipment does cause harmful interference to 
radio or television reception, which can be determined by turning 
the equipment off and on, the user is encouraged to try to correct 
the interference by one or more of the following measures:
 Relocate or reorient the receiving antenna.
 Increase the separation between the equipment and receiver.
 Connect the equipment into an outlet on a circuit different from 
that to which the receiver is connected.
 Consult the dealer or an experienced radio/TV technician for help.
FCC  COMPLIANCE STATEMENT
1
3
2
TROUBLE
CAUSE
SOLUTION
Unit will not turn on
The fuse is blown
Check / replace the fuse
Ignition not engaged
Turn ignition to on position
No sound is heard
Blown speaker
Replace faulty speaker
Volume is low / muted
Press the volume level up
Device is paused or muted
Check your devices playing / 
volume status
Cannot pair Bluetooth 
The Bluetooth function of the 
device is not enabled
Refer to the user manual of the
device for how to enable the
Bluetooth function
The MGR350B BT memory 
is full
Follow how to reconnect a 
device in section D
The audio quality is poor 
after connection with a 
Bluetooth enabled device
The Bluetooth reception is poor
Move the device closer to the
audio system or remove any
obstacle between the device 
and the systems antenna
Sub woofer is not playing
Sub level is muted
Adjust sub level to preferred 
level
Sub out is not enabled
Follow steps in section H
Unit has become
unresponsive
Power glitch or interference
Disconnect power for 
10 seconds to reset
Low battery power
Charge battery, run the engine 
to recharge the battery
Reset the main system
Follow steps in section H
INSTALLATION PRECAUTIONS
Always consult with a professional installer
 Do not attempt to install or service this product by yourself. 
Installation or servicing of this product by persons without 
professional training and experience in electronic equipment and mo-
torized vehicle accessories may be dangerous and could expose you 
to the risk of electric shock, injury or other hazards
 Refer any repairs to a qualified 
BOSS AUDIO SYSTEMS 
Service 
Center
 The MGR350B should be wired directly to a vehicles battery 
 When wiring directly to the vehicles battery, be sure to disconnect 
the batteries negative terminal wire before starting any wiring pro-
cedures, if extending the main power  primary wire, it is suggested 
that an optional fuse and fuse holder (not included) with minimum 
rating of 
20 Amperes be in-line with the positive battery terminal 
 The ground cable length should be as short as possible, if extend-
ing from you battery, be sure to use a proper gauge rating for the 
length of the run, use only high quality copper primary type wire
 The MGR350B has a IPX6 weather resistant design, it should not be 
submerged in or under water under any circumstances
 Use only the installation parts provided with the MGR350B
TOOLS NEEDED:
- Measuring Tape / Ruler 
- Wrench and/or Pliers
- Hole Saw
- Crimp Tool 
CAUTION!!
Using other mounting methods may void 
this warranty
  
 
 
 
FM TUNER FREqUENCY RANGE
 
USA        87.5~107.9MHz
 
Europe    87.5~108MHz
 
Asia         87.5~108MHz
 
Australia  87.5~108MHz
 
Usable Sensitivity: 12dB (S/N=30dB)
 
Bands: 2
AM TUNER FREqUENCY RANGE
 
USA        530~1710KHz
 
Europe    522~1620KHz
 
Asia         522~1620KHz                                              
 
Australia  522~1620KHz
 
Usable Sensitivity: 40dB (S/N=20dB)
 
Bands: 1
WEATHER BAND SELECTION
 
 
CH.1  162.400MHz 
 
CH.2  162.425MHz   
 
CH.3  162.450MHz
• 
CH.4  162.475MHz
 
CH.5  162.500MHz
 
CH.6  162.525MHz
 
CH.7  162.550MHz
 
Bands: 1
 
BLUETOOTH
 BT: 4.0 
 BT Range: 33Ft / 10M (Class 2) 
 BT Profiles: A2DP / AVRCP 1.3 
USB DRIVE MEDIA SUPPORTED
 MP3
 WMA
 
65,000 Songs
 32GB / FAT 32
 
USB 2.0 High Speed
 USB Output Voltage: 5VDC @ 1A
INTEGRATED AMPLIFIER
 
 MOSFET
 
MAX Continuous Output: 240W 
(All channels driven)
 PEAK Power Rating: 63W / channel
 RMS Total Power Output: 150W 
 
Channels: 4
 Class: AB
 
Frequency Response: 20-25kHz
 4Ω stable
CHASSIS
 Chassis Dimensions HxDxW : 
0.79”x 3.75” x 3.5” / 20mm x 95mm x 90.2mm
 Button Backlight Illumination: RED LED
 FRONT/ REAR RCA Preamp Output: 2V 
RMS 
 RCA Input Impedance: 10kΩ
 TFT: TN Type / Active Matrix
GENERAL
 Power Source:  14.4VDC
(10.8V ~ 16V allowable)
 Grounding System: Negative type
 Maximum Current Consumption: 15A
 3-way protection circuitry (thermal, 
overload, and speaker short protection)                                                                                            
 Unit Weight:  1.08lbs / 0.52kg 
 Storage Temperature: 5
o
F to 113
o
F  / 
-15
o
C to 45
o
C
 Operation Temperature: 14
o
F to 104
o
F / 
-10
o
C to 40
o
C
 Replacement Fuse: 15A 
(Replace with ATG Fuse Type Only)
SPECIFICATIONS
Specifications subject to change without notice
qUICk START GUIDE
FOR CHARGING ONLY: Cell Phone and iPod
Media Playback Not Supported
iPod
® 
and iPhone
®
 are registered trademarks of Apple Inc.
registered in the USA and other countries.
BOSS Audio Systems is not affiliated with Apple Inc.
Copyright © 2015 AVA Enterprises Inc.