Owner's Manual
Troubleshooting
If
you
experience
performance
problems
with
this
product,
please
compare
your
installation
in
the
electrical
wiring
diagram
on
the
previous
pages.
If
problems
persist,
read
the
following
troubleshoot-
ing
tips
which
may
eliminate
the
issues.
Amplifier
Does
Not
Power
Up
Check
to
make
sure
you
have
a
good
ground
connection
Check
the
remote
input
turn
on
has
at
least
5V
DC
Check
that
there
is
battery
power
to
the(+]
terminal
Check
that
there
is
at
least
12V
Check
all
fuses,
replace
if
necessary
Make
sure
the
protection
LED
is
not
illuminated.
If
it
is
lit,
shut
off
the
amplifier
briefly
and
re-power
it.
Protection
LED
Comes
On
When
Amplifier
Is
Powered
Up
Check
for
short
circuits
on
speaker
leads
Turn
down
the
volume
control
on
the
head
unit
to
prevent
overdriving
Remove
speaker
leads
and
reset
the
amplifier.
If
the
protection
LED
is
still
illuminated
the
amplifier
is
faulty
and
needs
servicing.
No
Output
Check
that
all
fuses
are
OK
Check
that
the
unit
is
proper~
grounded
Check
that
the
remote
input
[turn
on]
has
at
least
5VDC
Check
the
RCA
audio
cables
are
plugged
into
the
proper
inputs
Check
all
speaker
wiring
Low
Output
Resetthelevelcontrol
Check
the
crossover
control
settings.
High
Hiss
In
The
Sound
Disconnect
all
RCA
inputs
to
the
power
sub's
control
panel.
If
the
hiss
disappears,
then
plug
the
component
driving
the
amplifier
and
unplug
its
inputs.
If
the
hiss
disappears
go
on
until
the
faulty/noisy
component
is
found.
It
is
best
to
set
the
amplifiers
input
level
control
as
low
as
possible.
The
best
subjective
signal-to-noise
ratio
is
achieved
in
this
manner.
Try
to
set
the
head
unit
as
high
as
possible
(without
distortion]
and
the
amp
input
level
as
low
as
possible.
Squealing
Noise
Is
Present
Check
for
improperly
grounded
RCA
interconnects
Distorted
Sound
Check
that
the
input
level
control
is
set
to
match
the
signal
level
of
the
head
unit.
Always
try
to
set
the
input
level
as
low
as
possible.
Check
that
all
crossover
frequencies
are
properly
set.
Check
for
short
circuits
on
the
speaker
leads.
Amplifier
Gets
Very
Hot
Check
that
the
minimum
speaker
impedance
for
the
amp
model
is
correct.
Check
that
there
is
good
air
circulation
around
the
amp.
In
some
applications,
it
may
be
necessary
to
add
an
external
cooling
fan.
Engine
Noise
[Static
Type]
This
usually
is
caused
by
poor
quality
RCA
cables
which
can
pick
up
external
noise.
Use
only
the
best
quality
Memphis
Connection
cables
and
route
them
away
from
power
cables.
Engine
Noise
[Alternator
Whine]
Check
that
the
RCA
grounds
are
not
shorted
to
the
vehicle
chassis.
Check
that
the
head
unit
is
properly
grounded.