14
TROUBLESHOOTING
Amplifier will not power up
• Check fuse
• Check all power connections (+ 12 V, Ground
and Remote)
• Check for at least 3 V on remote wire
Amplifier powers up, but then go into
Protection mode
All HC amplifiers are equipped with a diagnostic
device that turns the amp off immediately in case
of
shorted speaker wire (or shorted speaker) or
faulty amplifier.
To evaluate, disconnect all speaker wires and
re-power the amplifier: if it doesn’t go into
protection mode the problem is in the speaker
or in the speaker wire. If the amplifier goes into
protection mode with speaker leads disconnected,
the amplifier is faulty.
The amplifier can be restarted by turning the
remote power OFF and ON again.
Overheating
HC amplifiers feature a built-in thermal control
device that turns them off in case of extreme
temperature conditions. If this case occurs, allow
the amplifier to cool down before attempting to
restart it.
Thermal overload conditions are caused by a
lack of reasonable airflow over the heat sink or
by driving speaker of lower impedance than
recommended.
No sound
• Check radio volume and fader control
• Check speaker wires for loose or disconnect
• Check RCA input cable for defective, loose or
disconnect
• Check speaker wires for loose or disconnect
Weak output
• Check head unit volume and fader control
• Check amplifier level control setting
• Check that the correct crossover type has
been selected for the speaker being used
• Check RCA cables
• Check the head unit with another amplifier in
good working condition.
Only one channel works
• Check the balance control on the head-unit
• Confirm that all terminal strip connections are
secure and tight
• Reverse the input RCA plugs at the amplifier.
If the channel which is silent switches to the
other side the problem is either in the head-
unit or in the RCA interconnect
Hiss noise
• Check Input Level control of the amplifier
• Check head unit and disconnect input RCA
cable. If the hiss disappears RCA cable or
head-unit are faulty
Alternator whine in speakers
• Confirm that the amplifier and any other
signal sources are properly grounded.
• Remove RCA input from amplifier. If the whine
disappear, check input cable and head-unit
