Troubleshooting
Troubleshooting
9
Amplifier will not power up.
High hiss or engine noise (alternator whine) in speakers.
Check for good ground connection.
Check that remote DC terminal has at least 3V DC.
Check that there is battery power on the + terminal.
Check all fuses.
Check that Protection LED is not lit. If it is lit, shut off amplifier
briefly and then repower it.
Disconnect all RCA inputs to the amplifier(s)-if hiss/noise
disappears, then plug in the component driving the amplifier and
unplug it's inputs. If hiss/noise disappears, go on until the faulty/
noisy component is found.
It is best to set the amplifier's input level as low as possible.
The best subjective S/N ratio is obtainable this way. Try to drive
as high a signal level from the head unit as possible.
Protection LED comes on when the amplifier is powered up.
Check for shorts on speaker leads.
Check that the volume control on the head unit is turned down low.
Remove speaker leads, and reset the amplifier. If the Protection LED
still comes on, then the amplifier is faulty.
Amplifier(s) gets very hot.
Check that the minimum speaker impedance for that model is correct.
Check for speaker shorts.
Check that there is good airflow around the amplifier. In some
applications, an external cooling fan many be required.
Distorted Sound
Check that the Level control(s) is set to match the signal level of the
head unit.
Check that all crossover frequencies have been properly set.
Check for shorts on the speaker leads.
High squeal noise from speakers.
This is almost always caused by a poorly-grounded RCA patch cord.
