Owner`s manual
MULTIPLE
AMPLIFIER
COMBINATIONS
The
PA400.1,
PABOO.1,
and
PA
1200.1
subwoofer
amplifiers
can
also
be
used
in
Multiples
of
the
MASTER/SLAVE
combi-
nations
allowing
for
unlimited
expansion
to
a
system's
sub-
woofer
section.
To
use
multiples
of
amplifier
combinations
the
following
directions
must
be
adhered
to
for
best
results.
•
Audio
Signal-Divide
the
head
unit
or
processor
audio
signal
to
the
master
amplifiers
by
using
RCA
Y
adapters.
Be
sure
to
divide
them
an
even
number
of
times
to
ensure
the
input
level
at
each
master
ampli-
fier
is
matched.
•
Amplifier
Configuration-Set
up
each
MASTER/
SLAVE
amplifier
combination
as
described
for
the
combination
type
being
used.
(Refer
to
the
Parallel
Synced
Gain
or
the
External
Synced
Bridged
section
of
this
guide
for
amplifier
and
speaker
connection
descriptions.)
CROSSOVERSETnNGS
AND
GAIN
ADJUSTMENT
Your
Polk
Audio
power
amplifier
needs
to
be
adjusted
carefully
to
achieve
maximum
performance.
These
are
some
guidelines
to
follow
when
fine-tuning
the
amplifier.
•
Because
this
amplifier
is
only
designed
for
subwoofer
applications,
the
low-pass
crossover
is
active
at
all
times.
The
crossover
point
is
adjustable
to
allow
more
precise
system
operation.
•
Try
and
keep
the
setting
low
enough
to
prevent
image
smearing
(you
should
not
be
able
to
hear
male
voices
from
the
subwoofer)
but
not
so
low
as
to
create
a
gap
between
the
subwoofer
and
the
mid-bass/midrange
speakers.
It will
be
to
your
advantage
to
spend
some
extra
time
with
this
adjustment,
listening
to
familiar
music
or
system
set-up
discs
to
achieve
the
kind
of
musical
reproduction
that
you
prefer.
14
P A 1 2 V
AMP
L I
FIE
R S
•
The
gain
adjustment
allows
you
to
set
proper
signal
match
for
clean,
quiet
amplifier
operation.
Start
by
playing
some
music
you
are
familiar
with.
With
the
gain
adjustment
on
the
amplifier
in
the
middle
of
its
rotation,
bring
up
the
volume
on
your
head
unit
to
the
3/4
volume
setting
or
until
you
start
to
hear
distortion
or
clipping.
If
you
hear
distortion
before
you
reach
the
3/4
volume
setting
of
your
head
unit,
reduce
the
gain
setting
on
the
amplifier
and
start
to
raise
the
head
unit
volume
again.
When
you
can
listen
to
the
music
at
or
slightly
above
3/4
on
your
head
unit
without
audible
distortion,
slowly
raise
the
gain
of
the
amplifier
until
distortion
is
heard,
then
back
off
the
gain
until
the
distortion
is
not
audible.
This
setting
will
allow
you
to
reach
full
output
with
all
but
the
quietest
of
source
material,
while
avoiding
excessive
noise
in
the
system.
.
•
For
systems
using
the
Remote
Sub
Level
Adjustment,
increase
the
subwoofer
gain
on
the
amplifier
by
25%
and
set
the
Remote
Sub
Level
knob
to
the
center
position
after
making
all
system
gain
and
filter
adjustments.
This
will
give
the
Remote
Sub
Level
Control
a
wider
range
of
adjustment
to
the
subwoofer
output.
•
You
should
take
into
consideration
the
effect
that
gain
adjustment
has
on
system
frequency
response
and
staging.
Again,
plan
on
spending
some
time
with
music
that
you
know
getting
the
gain
and
crossover
settings
the
way
you
like.
Test
discs
arid
analyzers
may
help
with
this
process,
but
in
the
end
it's
your
ears
that
count,
listen
to
the
music!
LED
TUBE
INSTALLATION
(OPTIONAL)
NOTE:
If
the
optional
fan
IS
NOT
being
used,
we
recom-
mend
that
the
second
LED
tube
be
wired
to
this
circuit.
If
the
optional
fan
is
being
used,
we
recommend
that
the
second
LED
tube
be
wired
in
parallel
with
the
first
LED
tube.