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Copyright 2016 Retro Manufacturing, LLC
Alternator noise that varies with RPM
Poor bass response
Speakers are out of phase. Ensure that
positive and negative speaker terminals
are wired correctly.
• Check for damaged RCA cables.
• Check the radio and amplifier ground.
• Turn down the amplifier level setting.
Power LED does not turn on
Power LED illuminates blue,
but there is no power output
The amplifier becomes very hot and shuts
down or plays at a very low volume
• Thermal protection is engaged.
Check for proper impedance
at speaker terminals and air
flow around the amplifier.
• Voltage protection is engaged.
Voltage to the amplifier is not within
the 10-14.5 volt operating range.
Inspect the charging system.
• Short circuit protection is engaged.
• Check for speaker wires shorted to
each other or the vehicle chassis.
• Advanced protection circuitry
is engaged due to high internal
temperature of the amplifier. The
amplifier needs more clearance around
the chassis. If this continues, choose a
better ventilated mounting location.
• High operating temperature can also be
caused by an incorrect input sensitivity
level. Reset the Level Control.
Check the terminals with
a digital multimeter:
• Both terminals should read
+12 to +14.5 dc volts.
TROUBLESHOOTING
PROBLEM
SOLUTION
