SEmNG
THE
CROSSOVER
MODULES
Selecting
the
Crossover
Frequencies: Your 6XS comes
"preloaded" with crossover modules that will allow it to work
in
a
number
of
system configurations. Here are the factory settings:
Should your system require different frequencies than what
comes with the 6XS, fear not, as you can change the crossover
modules to accommodatejust about any system configuration.
Most importantly, we recommend that you select crossover
frequencies according to the characteristics
of
your speakers. We
suggest the following ranges:
==
D
Ground
Subwoofer
Isolation
Selector
=PFM Subsonic
D
Rear
Highpass
=
Front
Lowpass
D
Front
Highpass
~
I:
3500 Hz and higher
250 Hz to 3500 Hz
80 Hz to 250 Hz
150 Hz and lower
Tweeters:
Midrange:
Midbass:
Subwoofers:
The
Legacy
Of
Crossover
Modules
To change the crossover
frequency on your 6XS, AudioControl products use anifty plug-in
module. Crossover modules are more accurate and reliable than
most knobs
or
simple switches that are offered by other manufactures
and come on many amplifiers. Your authorized AudioControl dealer
will generally stock awide selection
of
crossover modules for your
6XS should you wish to change the crossover frequencies.
If
your system design calls out for crossover frequencies that
your dealers does not stock, you can create custom modules by using
the following formula:
_7200_
=Resistor Value In Kilohms
Frequency (Hz)
USING
THE
PFM
(PROGRAMMABLE
FREQUENCY
MATCH)
FILTER
Many car audio systems truly push the limits
of
their subwoofer
...
without really knowing
it.
Tuned enclosures affect the roll-off
of
many speakers, yet lots
of
source material forces the speakers to play
lower than expected. The net result
is
wasted amplifier power and
damaged speakers. The AudioControl PFM (Programmable Fre-
quency Match) filter
is
aprogrammable subsonic filter.
It
allows you
to only let the speaker(s)
playas
low as they should be playing.
Because every system is different, we allow you to change the PFM
roll-offfrequency to whatever you choose.
On most systems, the factory installed module (33Hz) is fine.
However,
if
you know the tuning frequency
of
your speaker enclo-
sure (porting frequency
or
3dB down point), you might try setting
your PFM module to that frequency.
If
you want to protect your
speaker system even more, you might even try ahigher frequency.
page 9
As there is probably agood chance
that you are not using AudioControl
speakers (because we
don't
make
speakers), we suggest you contact the
manufacturers
of
your speakers for their
recommendation.
Example:
For a2500Hz module -7200/2500=2.88K
ohms
The 24 dB crossover module re-
quires eight resistors
of
this value.
Note: Use Y4wattcarbon
or
metal
film resistors
of
a5% tolerance
or
better.
Four/Six Two
Outputs Channel Input Channel Input
Front Highpass 250 Hz and up 250Hz and up
Front Lowpass 90 Hz to 250Hz 90 Hz to 250 Hz
Rear Highpass 250 Hz and up
Subwoofer 30 Hz to 90 Hz 30 Hz to 90Hz
Figure
8:
Dash mount remote
Remote
In: Connect a22 to
18
gauge wire from the head-
unit's remote tum-on to the "Remote In" connector on the 6XS.
Positive (+12V) Connection: Insert an
18
gauge or larger wire
into the connector labeled "Power" on the nifty connector
of
your
6XS. Connect
it
to agood constant source
of
12
volts (we suggest
the battery), fused at Iamp.
Ground
Connection: Use the same gauge wire
as
you did for
the positive connector and run
it
from the "Ground" connector on
the 6XS to the negative terminal
of
the battery, aground bus, or a
verified ground location. The factory
head
unit
ground
is
not
a
good
ground!
When the electrical connections are complete, you may recon-
nect the negative terminal to your battery.
AutoMode
Inputs:
If
your source unit has front, rear, and
subwoofer outputs (aka "six channel"), connect them to the identi-
cal inputs on your 6XS. However,
if
you are only using front and
rear signals (four channel) or just two channels, the Auto Mode
circuitry
in
your 6XS will automatically feed your subwoofer
channel with signal from your front inputs.
ELECTRICAL
CONNECTIONS
&:
WARNTNG.·
F,;I=
'"
d;~~~'
"'",,"""
Iterminal
of
your
battery prior
to
the installation
of
your
6XS
can result in awann tingly feeling.
•
DASH
CONTROL
INSTALLATION
Placement
and Mounting: The dash control may be mounted
under the dash using its own bracket or through acustom hole in
the dash.
It
should be mounted within reach
of
the driver and in a
spot where the LED
is
plainly visible. The dash control mounts with
two screws, which attach to the underside
of
the dashboard. Slide
under the dash and place the dash control
in
its mounting position.
Mark the mounting holes, drill pilot holes, and secure with two
screws.
Custom
Installation: For that custom look, the dash control
can be flush mounted in the dashboard or center console. Disas-
semble the 6XS dash control from the mounting bracket. Start by
pushing the LED back out
of
its holder followed by removing the
circuit board and rotary control from the bracket. Drill a
0/
)2"
hole
in
the dashboard for the control along with aY
8"
hole for the lock
tab and a
'ji
64"
hole for the LED holder. Reassemble the dash
control components on the dashboard and apply the new label over
the openings.
Dual-Color
LED: The LED on your dash control
is
rain forest
green and should brighten or dim when you turn the knob
either clockwise or counter clockwise. Should you
wish to change the color to amber, remove
the plug connected to the LED
and turn it 180 degrees
and plus
it
back
in.
page 8
INSTALLING
THE
CHASSIS
Up to this point everything you have read has served to educate
you on the operations
of
6XS. We are sure that you are chomping
at the bit
to
install 6XS so we recommend you read the following
sections very carefully.
Placement: The 6XS needs to be installed
in
the signal path
between your source unit and before any amplifiers. Since you
should not be changing the crossover modules while you are driv-
ing, the physical chassis
of
your 6XS can be mounted anywhere
within the vehicle.
Mounting: Once you have selected apermanent mounting
location for the chassis, position the unit and mark the appropriate
mounting holes with afelt-tip pin or scratch awl. Before doing
anything else, make sure you are not about to drill ahole
in
agas
tank or pierce any existing wiring. Nothing ruins your day more
than an expensive repair bill. Drill asmall pilot hole and secure the
chassis
of
the 6XS with self-tapping screws.
