User manual

Symptom Remedy
Audible distortion Excessive input signal. Reduce the signal level.
Never operate the loudspeaker with such a high signal
level that the SIGN/LIMIT LED lights solid red!
Different channel levels (when
using two monitors)
1. Make sure that for both channels the same type of
cable (balanced, unbalanced) is used.
2. Make sure that your speaker system is fully connected
and both speakers have the same input impedance.
Hum and noise 1. Use the ‘Ground/Lift’ switch, if applicable on all ampli‐
fiers connected to the system.
2. Make sure that only balanced cables are used.
3. Make sure that all audio devices are connected on the
same power grid circuit and therefore share the same
ground reference.
If the procedures recommended above do not succeed, please contact our Service Center. You
can find the contact information at www.thomann.de.
Troubleshooting
Mon A10, A12, A15
25