Memphis Power Reference Series - Wiring Single Channel Amplifiers; Wiring Subwoofers; Setup and Adjustment

Wiring
Single
Channel
Amps
PRXA&00.1//1000.1//1500.1
@
PRXABDD.l
GROUHIJ
REMIJTE
•12V
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I
!POWER
REFERENCEd
WIRING
SUBWOOFERS
PRT
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PWR
MinlO
When
using
a
single
amplifier
to
power
one
subwoofer,
the
positive
and
negative
terminal
of
the
subwoofers
voice
coil
is
connected
the
positive
and
negative
terminal
of
the
Amplifier.
N
Always
check
your
speaker
load
with
a
multi-meter
before
hooking
up
to
the
amplifier.
The
PRXABOO.l,
PRXA1000.1,
PRXA1500.1
amplifiers
are
1
ohm
stable.
Any
Impedance
[load)
smaller
than
1
ohm
will
damage
the
amplifier!
Such
damage
is
not
covered
under
warranty,
so
pay
strict
attention
to
what
connections
are
made
to
the
amplifier.
SET
UP
AND
ADJUSTMENT
Sensitivity
The
sensitivity
control
is
NOT
a
volume
control.
The
sensitivity
control
adjusts
the
amount
of
signal
required
to
drive
the
amplifier
to
full
output.
With
the
sensitivity
at
maximum
[full
clockwise
rotation),
less
signal
voltage
is
required
to
drive
the
amp
to
full
output.
With
the
sensitivity
at
minimum
[full
counter-clockwise
rotation),
more
signal
voltage
is
required
to
drive
the
amp
to
full
output.
Low Pass
Filter
[LPF)
The
low
pass
crossover,
or
filter,
is
designed
to
remove
high
frequency
information
from
a
subwoofer.
This
is
generally
used
to
prevent
mid-bass
speakers
or
subwoofers
from
trying
to
reproduce
mid
and
high
frequency
information
that
they
are
not
designed
to
reproduce.
The
crossover
frequency
is
adjustable
from
50Hz
to
180Hz,
and
uses
a
12dB
per
octave
slope.
Frequency
selection
is
made
by
rotating
the
dial;
clockwise
raises
the
frequency
and
counter-clockwise
lowers
the
frequency.
Most
subwoofers
should
be
set
between
80
and
100Hz,
depending
on
how
low
the
mid-bass
or
midrange
drivers
are
capable
of
playing.
Bass
Boost
[Q5Hz]
Boost
should
be
used
with
discretion,
keeping
in
mind
that
electronically
enhanced
boost
places
an
additional
load
on
the
amplifier
and
the
speakers
they
are
connected
to.
This
control
is
fully
variable
from
0
-
12dB.
Infrasonic
Filter
This
filter
is
fully
variable
from
20Hz-50Hz
and
removes
unwanted
frequencies
below
the
frequency
selection.
This
filter
is
most
useful
with
subwoofers
loaded
in
a
ported
enclosure,
which
helps
prevent
unloading
[rapid
loss
of
power
handling
below
the
port
tuned
frequency].