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The prerequisite for feedback is that the played back signal is louder than the original signal. A feedback
never cover the whole frequency range but only one overboosted frequency.
Make sure that you install especially the monitor-speakers so far away from the microphone that another
recording of the microphone signal is impossible.
Extreme levels like feedbacks, bass-hum or the beats of a dropping microphone can destroy the
loudspeakers within very short time and produce immediate hearing damage. Such extreme levels must be
avoided at any rate. We recommend to use appropriate equalizers and Compressor/limiters.
Installing the speaker-cables
Connect the speaker-systems among each other using the inputs and outputs. Connect the cable of the first
speaker-system with the Speaker-socket Output CH-1 and Output CH-2 of the amplifier. The signal will be
transmitted to the individual speaker-systems.
Always treat the cables carefully and protect them from damages during transportation.
Install the cables always in a structured way and protect them from damage.
The cables must be installed in a way that no person can stumble over them. Always fix the cables with an
appropriate tape.
Both cables should be of the same kind.
Both cables should have the same length.
Both cables should be installed directly (no loops, S-shaped overlengths)
Always install the cables far away from power cables (never closely parallel)
Never put heavy objects like speaker-systems, flightcased etc. on cables.
Never wind up cables tightly around the elbow, but rather sleek with an interior diameter of 20 to 30 cm.
Overhead rigging
Please note:
when using this speaker-system in public or industrial areas, a series of safety instructions
have to be followed that this manual can only give in part. The operator must therefore inform himself on the
current safety instructions and consider them.
DANGER TO LIFE!
Please consider the EN 60598-2-17and the respective national norms during the installation!
The installation must only be carried out by an authorized dealer!
The installation of the speaker-system has to be built and constructed in a way that it can hold 10 times the
weight for 1 hour without any harming deformation.
The installation must always be secured with a secondary safety attachment, e.g. an appropriate catch net.
This secondary safety attachment must be constructed in a way that no part of the installation can fall down
if the main attachment fails.
When rigging, derigging or servicing the speaker-system staying in the area below the installation place, on
bridges, under high working places and other endangered areas is forbidden.
The operator has to make sure that safety-relating and machine-technical installations are approved by an
expert before taking into operation for the first time and after changes before taking into operation another
time.
The operator has to make sure that safety-relating and machine-technical installations are approved by an
expert after every four year in the course of an acceptance test.
The operator has to make sure that safety-relating and machine-technical installations are approved by a
skilled person once a year.
Procedure:
The speaker-system should be installed outside areas where persons may walk by or be seated.
