INSTALLATION / OWNER'S MANUAL
Troubleshooting
Problem
Cause
Action
Unit will not turn on
(Power LED is off)
+12V wire not connected or incorrect
voltage.
Check connections for proper
voltage (11~16V DC)
GND wire not connected
Check connection to ground
ACC wire not connected.
Check connection to ACC line.
Power LED is on
solid red, but
there is no sound
Engine noise
Distorted audio
output
Low audio output
REM OUT wire not connected.
Check the REM connection between
Smart EQ and the amplifier.
Audio out wire not connected.
Check audio out connection
between Smart EQ and the amplifier.
Bad ground connection
Make sure Smart EQ and the
amplifier are grounded to clean
bare metal surface.
Signal ground loop or RFI
(radio frequency interference)
For the low level input (RCA), check
the connections on RCA plugs and
make sure the connection is solid.
For the high level input, if the input
ground pin is connected, disconnect
the pin. If the input ground pin is not
connected, connect the pin.
Incorrect input signal type or input
level too high
Check connections and reduce/
adjust the input level
Incorrect input signal type or input
level too low
Check connections and increase/
adjust the input level
Radiated noise from power cables
When routing wires, keep the 12V
cables (power/remote turn-on)
away from the audio signal cables
(low/high level) as far as possible
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