Owner's Manual
Table Of Contents
••
XPA
SERIES
OPERATION
--------------------
Configuration/Setup
Input level Control
Input Mode Switch
(XPA4640)
Crossover Mode '
(XPA2500
&
XPA4640)
The
input level control (gain) is used
to
obtain the best
possible match between the head unit audio output and
the amplifier input. Begin
by
turning the input level control
fully counterclockwise. Next. turn up the head unit volume
control around 3/4 of the way
up.
Adjust the input level
control clockwise until audible distortion is heard, then
slightly counterclockwise
to
provide the best match.
Repeat for all input level controls.
Select 2
CH
mode
if
the head unit only has 1 pair of
RCA
outputs. Plug the
RCA's
from the head unit into channels
1/2 or 3/4. All 4 amplifier inputs
will
receive a signal.
NOTE:
There is
no
fader fundion when using 2
CH
mode.
Select 4
CH
mode if the head unit has 2 pairs of
RCA
outputs. Plug the
RCA's
from the head unit into channels
1/2 and 3/4.
The
crossover is used
to
filter out frequencies above
or
below a certain point.
Choose
LPF when using the amplifier
with subwoofers. HPF when using with midrange/tweeter
combinations and FULL when using with coaxial-type
speakers.
NOTE
Choose FULL when using the amplifier in stereo/
bridged simultaneous mode.
In
this mode, passive
crossovers are required. Failure
to
use the correct passive
components may damage the amplifier and/or speakers.
Consult a qualified professional for recommendations.
Crossover Frequency Control This control allows precise adjustment of the crossover
frequency.
Bass Boost This control provides additional boost
@
45Hz
when used
with subwoofers. Adjust this control with caution - as
improper use can damage speakers!
LED
Indicator :
The
LED
indicator illuminates green during normal
operation
(POWER)
and red when the amplifier detects a
fault (PROTEen.
-----_._-_.-
8
••
XPA
SERIES
OPERATION
--------------------
Configuration/Setup
Input level Control
Input Mode Switch
(XPA4640)
Crossover Mode '
(XPA2500
&
XPA4640)
The
input level control (gain) is used
to
obtain the best
possible match between the head unit audio output and
the amplifier input. Begin
by
turning the input level control
fully counterclockwise. Next. turn up the head unit volume
control around 3/4 of the way
up.
Adjust the input level
control clockwise until audible distortion is heard, then
slightly counterclockwise
to
provide the best match.
Repeat for all input level controls.
Select 2
CH
mode
if
the head unit only has 1 pair of
RCA
outputs. Plug the
RCA's
from the head unit into channels
1/2 or 3/4. All 4 amplifier inputs
will
receive a signal.
NOTE:
There is
no
fader fundion when using 2
CH
mode.
Select 4
CH
mode if the head unit has 2 pairs of
RCA
outputs. Plug the
RCA's
from the head unit into channels
1/2 and 3/4.
The
crossover is used
to
filter out frequencies above
or
below a certain point.
Choose
LPF when using the amplifier
with subwoofers. HPF when using with midrange/tweeter
combinations and FULL when using with coaxial-type
speakers.
NOTE
Choose FULL when using the amplifier in stereo/
bridged simultaneous mode.
In
this mode, passive
crossovers are required. Failure
to
use the correct passive
components may damage the amplifier and/or speakers.
Consult a qualified professional for recommendations.
Crossover Frequency Control This control allows precise adjustment of the crossover
frequency.
Bass Boost This control provides additional boost
@
45Hz
when used
with subwoofers. Adjust this control with caution - as
improper use can damage speakers!
LED
Indicator :
The
LED
indicator illuminates green during normal
operation
(POWER)
and red when the amplifier detects a
fault (PROTEen.
-----_._-_.-
8