Owner's Manual
Control Panel
Features
Protection
Power
8 9
GTO
TM
Signal
Sense
I
I
••
High
Pass
Crossover
~On
<IIIII
80Hz
Off~
BYPASS
120Hz~
10 1 1
8. Power
LED
-
If
you have connected your battery power, vehicle
ground, and turn-on
lead
(or
GTO™
signal
sensing)
correctly,
then
this
light
should
turn on
to
indicate the power
is
ON.
9.
Protection
LED
-The
ACM-4.300 amplifier
has
built
in diagnostic
codes
to
tell
you
exactly
what
is
going
wrong
should
the
amplifier
detect a problem.
If
the protection
LED
should
come on, read the
flashing codes
quickly
before
turning
off
the
system and investi-
gating.
(See
the specs page for a
list
of
diagnostic codes.)
10.
GTO™
Signal Sense
-In
the
ON
position,
the
ACM-4.300 amplifier
will
turn
on
gracefully
when
it
detects an incoming audio
signal,
and
it
will
turn
off
after a period
of
time
when the audio
signal
fades away
to
silence.
In
some situations, factory installed audio
systems may
turn
on or
11
Wake
up" due
to
convenience features
like
door
chimes,
alarms,
and
cell phone
signals
that
trigger the
source
unit
in the
vehicle
to
come on.
To
prevent these from
turning
your audio system on unexpectedly, you can bypass the
High
Pass
Gain
Maximized
Crossover
Gain
Maximized
r®
llBJ
r®
~
~80Hz
BYPASS
120Hz~
I
12
I
13
1 1
12
13
GTO™
circuit by moving
the
switch
to
the
OFF
position and
use
a switched
12-volt signal
connected
to
the
Remote
In
terminal
instead.
11.
High
Pass
Crossover
Frequency
-Since
component
speakers
(like
woofers) are designed
to
reproduce certain frequency ranges,
a crossover allows
you
to
match the speaker
to
the appropriate
frequency range. Most manufactures
list a recommended cross-
over frequency
as
part
of
the speaker specifications.
Choosing
the
correct crossover
point
will
provide increased speaker
reliability
and
optimum
sound
quality.
The
ACM-4.300 amplifier
has
selectable
12
dB/Octave Linkwitz-Riley crossover points at
80
Hz,
120
Hz,
and a llbypass" option. The
amplifier
receives the
frequency range above the crossover point. Select
the crossover
frequency on
the
ACM-4.300 amplifier
to
best match the
value
specified by your loudspeaker's manufacturer.
If
you
do
not
know
this value, select
the position
that
suits your system best.
Audiocontrol
®
Making
Good
Sound
Great'M
5