6
Facing
the
driver
Diagram
2
3.
The
visor
microphone
has
a
noise
canceling
feature
and
must
be
mounted
facing
the
driver
as
shown
in
the
picture
above.
4.
To
avoid
visual
or
physical
obstruction,
route
the
microphone
cable
down
inside
the
door
molding.
Allow
sufficient
slack
in
the
connector
end
of
the
cable
to
reach
the
Junction
Box.
5.
Feed
the
cable
to
the
location
where
you
intend
to
mount
the
junction
box.
Note:
The
microphone
should
not
be
mounted
near
a
window
or
in
a
spot
where
road
and
ambient
background
noise
would
be
substantially
high
(above
85dB
SPL).
C.
Installing
the
Power
Cable
Caution:
The
AdvanceMobile™
VX1
should
be
used
with
a
negative
ground
electrical
system
only.
Reverse
polarity
(positive
ground)
will
trigger
protection
circuits
which
cause
the
cable
fuse
to
open.
Check
the
ground
polarity
before
you
begin
the
installation
to
prevent
wasted
time
and
effort.
12V
DC
or
24V
DC
automotive
systems
are
directly
supported
Determine
the
best
cable
route
to
the
vehicle
ignition
for
the
Power
Cable
from
the
location
where
you
intend
to
mount
the
Junction
Box.
Diagram
3
