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Before beginning, disconnect the negative (-) terminal of the battery prior to working on the
positive (+) terminal to prevent a short to ground.
4 9
Reverse left and right RCA outputs.
OPPOSITE CHANNEL
Reverse RCA inputs
OPPOSITE CHANNEL
Reverse RCAs at head unit
(check Balance Control)
SAME CHANNEL
Problem is in the amplifier, speakers or associated wiring of
the silent channel.
YES
Check Input cables for signal
by connecting them straight
to the amplifier.
YES
Problem is in the FRX-456.
See your local Authorized
PrecisionPower Dealer
or call 1-800-62POWER
NO
Check Input cables for signal
by connecting them straight
to the amplifier.
NO
Problem is elsewhere in
the system. Check head
unit and amplifiers.
ANY SOUND NOW?
SOUND IS NOW IN
SOUND IS NOW IN
SOUND IS NOW IN
SAME CHANNEL
Problem is in the FRX-456. See your local Authorized
PrecisionPower Dealer or call 1-800-62POWER.
SAME CHANNEL
Problem is in the RCA cable.
OPPOSITE CHANNEL
Problem is in the head unit.
Check crossover frequencies for Low Pass points set higher than High Pass points,
check level control setting for sub and rear Fill, and check gain control on the affected
amplifier(s).
STILL LOW OUTPUT- See your Authorized
PPI
Dealer or call
1-800-62POWER.