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When mounting the device into the rack, please make sure that there is enough space around the device so
that the heated air can be passed on. Steady overheating will damage your device.
You can fix the device with four screws M6 in the rack.
Inputs
A good cable run improves the sound quality remarkably. Input cables should be short and direct, since high
frequencies will be mostly be absorbed if the cables are unnecessarily long. Besides that a longer cable may
lead to humming and noise trouble. If long cable runs are unavoidable, you should use balanced cables.
The inputs of your OMNITRONIC ZD-250 are equipped with XLR-sockets.
Outputs
The high damping factor of your equalizer supplies a clear sound reproduction. Unnecessarily long and thin
cables will influence the damping factor and thus the low frequencies in a negative way. In order to
safeguard good sound quality, the damping factor should lie around 50.
The outputs of your OMNITRONIC ZD-250 are equipped with XLR-connectors.
Occupation balanced XLR-connection:
2
1
3
1
2
3
Balanced use with XLR connectors
1 = Ground / Shield
2 = Hot (+)
3 = Cold (-)
For unbalanced use pin 1 and pin 3 have to be bridged
Input
Output
Connection with the mains
Connect the device to the mains with the enclosed power supply cable.
The occupation of the connection-cables is as follows:
Cable
Pin
International
Brown
Live
L
Blue
Neutral
N
Yellow/Green
Earth
The earth has to be connected!
If the device will be directly connected with the local power supply network, a disconnection switch with a
minimum opening of 3 mm at every pole has to be included in the permanent electrical installation.
The device must only be connected with an electric installation carried out in compliance with the IEC-
standards. The electric installation must be equipped with a Residual Current Device (RCD) with a maximum
fault current of 30 mA.
OPERATION
Make sure to power-up before your power amplifier is turned in order to avoid loud transients which could
damage your speakers or annoy your audience.
Switch the device on via the power switch.
