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3.Many noise problems exist due to a lack of car maintenance. A general tune-up
and periodic check of the vehicle's charging system should be made.
4.In some situations the complete elimination of engine noise may not be
possible. In those cases, one can only hope for an acceptable degree of
reduction. Consult your professional auto sound dealer to aid you in those
"tough" cases.
INSTALLATION RULES
1. Use shielded cables whenever a preamp level music source is used.
2. All connections must be tight, free from corrosion and paint, etc. and insulated.
3. Route all signal cables away from existing wiring in the vehicle.
4. If possible, avoid mounting the amplifier in the dash or on the firewall, as noise
may be induced due to the proximity of noisy wiring and switches.
NOISE TROUBLESHOOTING PROCEDURES
1. Start engine and let idle.
2. Turn system on. ADJUST INPUT GAIN ON AMP SO THAT IT IS TURNED
DOWN AS FAR AS POSSIBLE TO STILL PRODUCE ADEQUATE LISTENING
LEVELS.
3. Slowly increase and decrease engine speed.
4. Take note as to the type and amount of noise while slowly varying the volume
control on the music source from minimum to average levels.
5. If noise is a popping or ticking sound, increasing in speed with engine speed,
the source is probably the ignition system. If the noise is a "whistle," the source is
the alternator. If the noise is present only when the volume is turned up, both
types of noise require similar treatments.
6. Unplug the inputs to the amplifier at the amp. Again, listen to the amount of
noise. If the noise disappears, install a noise kit (which can be purchased at any
Radio Shack or other electronic outlet.) (See note A)
7. If the noise remains when the inputs are removed, re-route the power
connections and check for the proper ground connections (see note B).
© 2008 Linear Power, Inc. - ALL RIGHTS RESERVED
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LINEAR POWER™ is a trademark of Linear Power, Inc.
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