Orion 425 HCCA - SYSTEM ADJUSTMENTS; GENERAL ADJUSTMENT PROCEDURES; GAIN ADJUSTMENT; CROSSOVER ADJUSTMENT

SYSTEM ADJUSTMENTS
IMPORTANT: You will get less system noise if you
keep the amplifier gain as low as possible.
If you are adjusting a system containing ORION acces¬
sories, refer to the adjustment procedures contained
in each applicable ORION accessory manual.
In general, make adjustments as follows:
1. Turn all power off.
2. Set the gain controls on all amplifiers to their mini¬
mum positions.
3. If an ORION 200 DAB Dual Amp Balancer is in¬
stalled in the system, set both fader controls to
maximum (fully clockwise).
4. Set all frequency controls on the 300 PRQ or 600
EQM Equalizers to flat response (dots in top center
position).
If a 500 PMQ Parametric Equalizer is being used,
set the frequency controls to the center position
and set the boost/cut controls to the center position.
5. If a 600 EQM is being used, set the input gain con¬
trol to minimum (fully counterclockwise).
If a 300 PRQ or 500 PMQ is being used, set both
input controls to minimum (fully counterclockwise)
and the VOLUME control for maximum (fully
clockwise).
6. Turn on power to the amplifiers. Turn on the radio
and set the VOLUME control for approximately
3/4 volume.
7. If a 600 EQM is being used, adjust the input gain
control clockwise until the speakers just start to
distort (clipping). If the gain control on the 600
EQM does not provide full volume, increase the gain
setting of each amplifier just enough to produce
clipping.
If a 300 PRQ or 500 PMQ is being used, adjust each
input gain control until the speakers just start to
distort (clipping). If the input gain controls on the
300 PRQ or 500 PMQ do not produce full volume,
increase the gain setting of each amplifier as re¬
quired to produce clipping. Decrease the setting of
the VOLUME control on the 300 PRQ or 500
PMQ for desired listening level.
CAUTION: Be sure to turn off the power when dis¬
connecting and reconnecting cables.
8. If a 200 CRX Active Crossover is installed in the
system, unplug the cable from the low output and
adjust the HIGH FREQ control to where the mid¬
range and highs sound best. Then plug in the low
output cable and unplug the high output cable.
Using the LOW FREQ control, adjust the lows until
sound good to you. Now plug in the high output
and make minor adjustments to suit your taste.
If a 300 CRX 3-Way Active Crossover is installed in
the system, proceed as follows:
NOTE: Ideally, the LOW OUT should be adjusted
to permit the subwoofers to reproduce all fre¬
quencies of W0 to 150 Hz and below. The HIGH
OUT should be adjusted to permit the tweeters to
reproduce only frequencies of about 4 kHz and
above. The MID OUT should be adjusted to pass a
band of frequencies of about W0 Hz to 4500 Hz.
The response of the various speakers greatly affects
these adjustments, however, so it is generally al¬
ways better to trust your ears and simply adjust
the various frequency outputs to where they
sound best to you.
a. Unplug the cables from the MID OUT and
HIGH OUT connectors and adjust the LOW
PASS control until the lows from the sub¬
woofers sound good to you.
b. Unplug the cable from the LOW OUT con¬
nector and plug in the HIGH OUT cable. Ad¬
just the HIGH PASS control to where the highs
from the tweeters sound best.
c. Unplug the cable from the HIGH OUT con¬
nector and plug in the MID OUT cable. Adjust
MID PASS controls until the instruments and
voice sounds delivered by the mid-range speakers
sound the fullest. Use the left-hand MID PASS
control to adjust the low end and the right-hand
MID PASS control to adjust the high end.
d. Now plug in the HIGH OUT and LOW OUT
cables and make minor adjustments to suit
your taste.