Lanzar VIBE211 - Troubleshooting Guide; Power and Protection Faults; Audio Quality Issues

Troubleshooting
Amplifier will not power up.
• 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.
High hiss or engine noise (alternator whine) in speakers.
• Disconnect all RCA inputs to the amplifier(s) - if hiss/noise disappears, then plug in the component
driving the amplifier and unplug its 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 may be required.
Distorted sound
• Check that the Level controls) 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.
dCanzar VlBE Owner’s MANUAL • 17