Harman Kardon CXO-1 - Low Pass Filters

CXO-1 FINAL ADJUSTMENT
You are now ready to adjust the
sound balance between the front,
rear and subwoofer speakers. There
is no magic formula for this. It
depends on your ear and your own
audio preferences. Some people
like lots of low bass. Others are
especially concerned with treble
clarity, etc. In fact, one of the rea-
sons for having a CXO-1 is the ability
to tailor yet another facet of your car
stereo system to your own tastes.
Final adjustment will require 1) A
well-recorded tape with full-range
sound (i.e. balanced amounts of
bass, midrange and treble), 2) a
small screw driver, 3) careful reading
of the step-by-step instructions in
this section of the manual, 4) an
assistant (optional, but very
helpful).
A. Head Unit Settings
1.
B.C
5.
Set the tone controls on your cassette/
receiver or cassette/tuner to neutral,
defeat any loudness circuits and make
sure that noise reduction and tape set-
tings are correct for the test tape you
are using.
Defeat any graphic equalizers or other
signal processing devices which are in
the signal path to the CXO-1.
Set the head unit’s balance controls to
their center position.
If the head unit has a front-to-rear
power fader, set it to full “forward”; if it
has a pre-amp fader control, set it to the
center position for equal balance
between the two pre-amp outputs.
X0-1 Settings
Set the 50Hz and 200Hz equalization
controls on the CXO-1 to their FLAT
position.
Set those output level controls dezng
used to their full MAXIMUM settings
(clockwise). Turn all waused output
level controls completely OFF (fully
counter-clockwise).
C. Listening
7.
Enter the vehicle and close all doors
and windows. This is very important to
ensure the proper acoustic environment.
‘Take a deep breath and play your test
tape at a comfortable listening level.
9. Confirm that all speakers are working
properly.
10. Note which speakers, if any, are too
loud in relation to the overall sound
mix. Is bass too heavy? Is treble too
shrill and fatiguing?
D. CXO-1 Level Adjustment
11. One at atime, reduce the CXO-1 level
controls which correspond to the speak-
ers which sound too loud. This should
be done in several increments for each
speaker, backing the controls off slowly.
(Here is where an assistant and vig-
orous gesturing comes in handy, so that
you don’t have to make multiple trips
back and forth from the trunk to the
passenger compartment.)
Remember that lowering the level of
one control may cause a change in the
overall tone balance that may necessi-
tate other adjustments.
12. When you are satisfied with the sound,
check the CXO-1’s output level con-
trols. AT LEAST ONE CONTROL
must remain in the full-on position.
If, in the heat of adjustment, all the
controls in use got turned down various
amounts, it will be necessary to raise
each of them until one is at full output.
E. Aftermath
13. Adjust the CXO-1’s 200Hz and 50Hz
equalization controls as needed. You
have now adjusted the constant level
and tone components of your system.
These settings will remain constant for
the life of the system.
14. Re-engage any head unit or graphic
equalizer tone controls. These can now
be freely used to adjust the sound of
individual program material such as
tapes and FM.
15. Fill out the Harman Kardon CXO-1
warranty card and mail it back to us.
16. IMPORTANT. Save your sales slip and
put it in a secure place. It will be neces-
sary for warranty and insurance pur-
poses, perish the thought.
You are now ready to enjoy the benefits of
multiple amplifiers and the CXO-1 Active
Crossover/System Controller. Once again,
thank you for choosing Harman Kardon.