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ZM 84 Audio Mixer
User Manual
8
Operating instructions
25. Audio BUS RJ45 Input Volume Control
To adjust the input signal level on the Audio BUS, turn the level control anti clockwise to the lowest
setting, or turn clockwise to adjust to the highest setting.
Power On/Off Procedure
Prior to making any connection to the mains power or audio inputs/outputs, turn all level controls
counter clockwise to the “min” position and all tone (equaliser) controls to the mid (zero) point.
Switch on the zone mixer and any audio sources (MP3 players, CD players, Microphones etc) before
powering the systems amplifier ON. The last product to be switched on should be the power/slave
amplifiers to prevent any unwanted noise or potential damage to speakers or amplifiers. If you wish
to power off the system, turn the amplifier’s master volume control counter clockwise to the “min”
position before switching the amplifier OFF before any audio sources are switched off. By following this
procedure it will prevent acoustic shocks to the speakers or potential damage to system components.
After connecting all audio sources and powering on the system, adjust the level of each audio input,
select the zone routing in order to achieve the desired “mix” for each zone. Care should be taken
to when adjusting microphone input volumes and the master volume, adjust both of these in small
increment’s to avoid feedback (howl around). The goal is to achieve a clear balance between music
and voice ensuring announcements can be clearly heard.
Internal Jumper System Configuration:
Cascading Multiple Units:
Via the AUDIO BUS IN and OUT connectors 16 units can be combined to one system
so that you have available max. 64 MIC/LINE and 48 AUX inputs.
The audio signal will be fed to the next unit via the “AUDIO BUS OUT“ output.
Via the mute link connector the different mute signals are passed to the other units. This allows
i.e. that a VOX priority of MIC1 not only mutes the inputs of the particular unit but also the inputs
of the other units.
By internal jumpers you can select to what external mute signals a particular unit should react.
You find more details in chapter 3.5.
By shortening the mute link connector all inputs of all connected units will be muted.
