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FPX Premium amPliFier
U s e r m a n u a l
+12V: The +BATT connector is designed to accept the power cable that connects the amplifier with the positive (+)
terminal on the vehicle battery.
GND: The GND (ground) connector is designed to accept the negative (-) power cable that connects the amplifier to
the vehicle chassis.
REM: The REM connector is for the connection between the amplifier and the source (head unit) via a REM or REMOTE
output on the head unit. This switches the amplifier on automatically when the source (head unit) is switched on.
POWER and PROTECT: These indicator lights are for checking that the amplifier is working correctly.
The POWER light, continuously lit, indicates that the unit is working correctly.
The PROTECT light, continuously or intermittently lit, indicates that the product is working abnormally. Refer to
troubleshooting in 5.
FUSES: The FUSES connector is for holding the amplifier fuses. Ensure that any replacement fuses perfectly match
the amperage of the originals.
5 - Troubleshooting
The statuses of the various LEDs are used to indicate certain failure modes or causes of breakdowns.
Check all possible cases below. If, after these checks, normal operation is not regained, please refer the issue to your
FPX amplifier's installer or dealer.
Status of Indi-
Presence of
cator LEDs
PROTECT red
Off
PROTECT
intermittent or
Flashing red
Off
Off
POWER
Flashing green
or distorted
Possible origin
sound
Output short
NO
circuit
No power or
NO
poor power
Distorted,
Overheating
no sound
NO
No REM signal
NO
Fuse failure
YES/NO
Ground (earth)
problem
Turn audio system off
Check speakers, minimum impedance of speakers,
speaker connections and cables
Turn audio system off
Check presence of 12 V
Check power cables and their polarity
Check fuses
Turn head unit off
Allow your amplifier to cool before resuming use
Turn head unit on
Check for voltage at REM terminal
Turn head unit off
Check fuses and replace if necessary
Turn head unit off
Check continuity of connection between GND terminal
and vehicle chassis
Action
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