SERIE DS-Active Power
SERIES
Manual del usuario /
User's manual
15
PROBLEM
CAUSE
SOLUTION
Feedback appears when the
LEVEL is
turned up.
1 – The microphone is pointing
towards the speakers.
2 – The microphone is not directional
enough or the talker/performer is too
far from the microphone.
3 - Incorrect EQ.
1 – Place the speakers in front of the
microphones.
2 – Use quality directional
microphones such as cardioid, super-
cardioid or hyper-cardioid and/or
nicely (this is very important!) ask
the talker/performer to talk or sing
closer to the microphone explaining
why.
3 – Avoid high gain settings on the
equaliser.
Hum or buzz when a mixer is
connected to the unit.
1 – The console probably has un-
balanced outputs. You may be using
an incorrect un-balanced to balanced
cable.
2 – The mixer and unit are not
plugged into the same mains outlet.
3 – The audio signal cable is too long
or too close to an AC cable.
1 – Read the Appendix of this manual
to make a correct un-balanced to
balanced cable.
2 - Connect the mixer and the unit to
the same mains outlet.
3 – Use a cable that is as short as
possible and/or move the audio signal
cable away from mains cables.
Hum or buzz when using lighting
controls in the same building.
1 – The audio signal cable is too long
or too close to the lighting cable.
2 – On a sound system with three-
phase AC, the lighting equipment and
the unit are connected to the same
phase.
1 – Move the audio signal cable
away from lighting cables. Try to find
out at what point the noise is leaking
into the system.
2 – Connect the sound system to a
different phase than the lights. You
may need the help of an electrician.
