Rockford Fosgate 360.6 Operation & Installation page 40

Symptom
Engine Noise
• If noise persists, see your Authorized Rockford Fosgate Dealer.
Diagnosis
Noise is radiating into
RCA signal cable.
Bad component in the sig-
nal chain.
Noise is radiating into
speaker cables.
Multiple grounds in the
audio system.
Ground loop between
source unit and antenna.
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Remedy
Check connections, run the
RCA cables on a different
route away from sources of
high current.
Check connections, bypass
additional components
(crossovers and equalizers)
between the source unit
and the amplifier. Connect
one component at a time
to determine the culprit.
Repair or replace compo-
nents as necessary.
Disconnect existing speak-
ers and connect a test
speaker to the output ter-
minals of the amplifier. If
noise is gone, reroute the
speaker cables away from
sources of high voltage.
Check ground connections
and connect amplifiers, sig-
nal processors, and other
components to a central
location or try a different
grounding point on the
chassis.
Check connections, dis-
connect antenna from
source unit. If noise is gone,
install an antenna ground
loop isolator.
TROUBLE-S
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