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SYSTEM ADJUSTMENTS
You will get less system noise if you keep the amplifier gain as low
as possible. This can be accomplished best with a preamp, such as the
ORION 300 PRQ, 300 PHD or 300 PSW.
If there are no accessories (equalizers, crossovers, etc.) used in the
system:
1. Turn off all power.
2. Set the Gain controls on all amplifiers to their minimum
position.
3. Turn on the power to the amplifiers. Turn on the radio and set
the Volume control to approximately 3/4 volume.
4. Adjust the Gain control on each amplifier until the system is at
full output. Just below clipping.
5. Set the Volume control on the radio for desired listening level.
If ORION accessories are being used:
1» Turn ail power off.
2. Set the gain controls on all amplifiers to their minimum
positions.
3. Set all frequency controls on the 300 PRQ Equalizer to flat
response (dots in top center position). If a 300 PHD or 300 PSW
Is being used, set both frequency controls, and the boost/cut
controls to the center position.
4. If a 300 PRQ, PHD or PSW is being used, set both input controls
to minimum (fully counterclockwise) and the volume control to
maximum (fully clockwise).
5. Turn on power to amplifiers. Turn on the radio and set the
Volume control for approximately 3/4 volume.
6. Adjust each input gain control on the pre-amp until the system
is at full output Just below clipping. If the input gain controls on
the pre-amp do not produce full volume. Increase the gain
setting of each amplifier as required to realized full output.
Decrease the setting of the Volume control on the 300 PRQ to
desired listening level.
CAUTION: Be Sure To Tiirn Off The Power When
Disconnecting And Re-connecting CableS-
26
TROUBLESHOOTING GUIDE
This section provides you with a catalog of amplifier symptoms
and their probable causes and solutions. Before you consult this
listing, make sure the vehicle's electrical system is working properly by
verifying that other electrical items (e.g. headlights, windows, etc.)
still function correctly.
Sym ptom
Probable Cause
Low or No Remote
Turn-On connections
Check remote turn-on
voltage at amp and head unit
Blown Fuse
Replace with new fast-blow fuse
Power wires not
connected
Check butt splices or solder
Jointsxheck Ground and
Battery connections
Blown speakers or
not connected
Use VOM or DVM to measure
speaker coil impedance;
check speaker wiring
connections
Audio cycles
on and off
Thermal Protection
Circuits are properly
shutting amplifier off
each time it gets too hot
Check location for for
adequate ventilation; check
speaker wiring for a short to
chassis
Distorted Audio
Input Sensitivity
not set properly
or damaged speaker
See Calibrating Input
Sensitivity procedure and
check each step; inspect each
speaker for damage and
repair or replace suspected
component
Low turn-on voltage
Refer to head unit owner's
manual
Audio level low
Mute circuit is on
Check electrical system for
low voltage; check speaker
ground connection
Speakers wired with
wrong polarity,
causing cancellation of
bass frequencies; low
voitage
Check polarity of wires from
amplifiers to each speaker as ■
defined by the system; check
battery connections
External fuse
blowing
Incorrect wiring or
short circuit; abuse;
damaged speakers
Refer to Electrical Installation
and check each installation step
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