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
tempor
arily
discont
inue use in potentially
hazardous
situation
s.
• Do
not
operate
mobile
video
e
quipment
while
dr
i
ving
a motorized
vehicle - safe
dr
i
ving
and
saf
e
ty
consider
ati
on
of
others
should
always be
your
highest
pr
i
ority
.
• 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
.
A
BEFORE
YOU
START
INSTALLATION PRECAUTIONS
Always
consult
with
a
professional
installer
• Do
not
attempt
to
install
or
service
this
product
by
yourself
.
Installation
or
servi
cing
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
, i
njury
or
other
hazards
• Refer any repairs
to
a qualified BOSS AUDIO SYSTEMS Service
Center
• The MGR450B
should
be wired
directly
to
a vehicles battery
• When
wiring
di
rectly
to
the vehicles battery, be
sure
to
disconnect
the batteries negative terminal wire before
starting
any
wiring
procedures,
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
extending
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 MGR450B has a IPX6 weather
resistant
design,
it
should
not
be
submerged in
or
under
water
under
any
circumstances
• Do
not
use abrasive cleaning materials
on
the lens
or
bezel
• Use
only
the installation parts provided with the MGR450B
CAUTION!!
0
3.
00
"/7
6
mm
Using oth r
mounting
methods
may
void
this
warranty
chassis
E) Ad
ust
M4
nuts
for
the
best
mo
u
nting
depth
0 S
lip
the
unit
through
the
ho
le
cutout
and
into
U-bracket
--
Snap
off
break-away
tabs
to
best
fit
your
applications
d
epth
Replace
Fuse
wlthAGU
type
only
L
To
avoid potential
shorts
in
the
electrical
system
, be sure
to
disconnect
the
(-
)
J battery cable before installation. Use
this
unit
with a 12-Volt battery and negative
grounding
only. Failure
to
do
so
may res
ult
.___
_____
""-""_~_,
in a fire
or
malfuncti
on
.
I
'.
r+diil&i
.,
-I.
I When replacing the fuse, be sure
to
only
use a
~
-"':::::.:·
.A
fuse
of
the rating specified
on
this
produc
t.
To
::;::.·:..::=:= avoid
short-circuiting
,
cover
any
disconnected
- leads
with
insulating
tape. It
is
specially
impor
-
tant
to
insulate
any
unused
wire
s,
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
.
T
YOUR
USBCABLE
1A
CHARGING
MAX
-
F
OR
CHARGI
NG
ON
LY: Cell P
ho
ne
and iPod
Med
ia
Playback
Not
Supported
OPTIONAL
DIRECT
BATTERY
WIRING
CIRCUIT
0
Secure
an
d
waterproof
the
wiring
~TI~
~
(!
(1
~1
TOOLS NEEDED:
- Measuring Tape I Ruler
- Wrench and/or Pliers
-Hole
Saw
l
-Crimp
Tool
0
Firmly
tighten
remaining
M4
nuts
BLACK
A
;
~
•
.::
i
' '
I I
I I
I I
:
__
lnot~_J
0
FuN-FUNHolder8a""'1fKII~.
(-Included)
(--)
~
J_
CAUTION!!
Chassis
-=-
ground
point
Do
not
ground
or
short
the
speaker
leads
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