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Occupation jack plug:
Unbalanced use of
mono 1/4" jack plugs
Tip =
Signal (+)
Sleeve =
Ground / Shield
Tip
Sleeve
Strain relief clamp
5. INSTALLATION
Install the device on a solid, plane, anti-slip, vibration-free, oscilation-free and fire-resistant surface.
Make sure that the power switch is set to OFF. Before you connect the devices, all units have to be switched
off.
6. OPERATION
When operating the amplifying system, please make sure that the loudspeakers always sound well. When
distorsions can be heard, either the amplifier or the loudspeaker is overloaded. Overloads can quickly lead to
amplifier or speaker damage.
In order to avoid damage, please reduce the volume immediately when distortions can be heard. When
speaker-systems are destroyed by overload, the guarantee becomes void.
Always check the sound pressure level with a meter in order to keep to the threshold.
If you want to switch off the system, switch off the amplifier first and then the pre-amplifiers in order to
avoid acoustic shocks on the speakers.
6.1 System-test
Connect your PA-system with the mains.
With the Power-switch, you can switch the PA-system on and off. When switching the device on, the Power-
LED is illuminated.
6.2 Adjusting the signal levels
As soon as the Audio-signals are present the signal levels are reproduced by the speakers. You can adjust
the level of the input signals via the respective controls
Balanced use of
stereo 1/4" jack plugs
Tip =
hot (+)
Ring =
cold (-)
Sleeve =
Ground / Shield
Tip
Ring
Sleeve
Strain relief clamp
For connection of balanced and
unbalanced plugs, ring and sleeve have
to be bridged at the stereo plug.
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