Installation; Rack Installation; Connections; Operation - Omnitronic EM-180 Bedienungsanleitung

5. INSTALLATION

5.1 Rack installation

Install the unit on a plane surface or in your rack. For 19" (483 mm) rack installation, 1 unit is required. Screw
on the two supplied mounting brackets at the left and right sides of the receiver housing. The rack should be
a double-door rack where the front panel and the rear panel can be opened. The rack should be provided
with a cooling fan. When mounting the unit 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 unit with four screws M6 in the rack.

5.2 Connections

Switch off the mixer prior to connecting any units or to changing any existing connections.
1. Connect the stereo audio sources to the corresponding RCA jacks of channels A and B (white jack =
LEFT; red jack = RIGHT):
- Connect units with line level output (e. g. CD/MP3 player) to the jacks LINE
- Connect turntables with magnetic system to the jacks PHONO. If your turntable is equipped with a separate
ground lead, connect it to the clamping screw GND.
2. Connect a microphone to the 6.3 mm jack.
3. Connect the amplifier(s) to the balanced XLR master output and/or to the unbalanced RCA master output.
4. The input channels can be monitored via stereo headphones. Connect the headphones to the jack
PHONES.
5. Connect the USB ports with the supplied USB cables to your computer. Each of the two USB ports allows
transmission of digital audio signals in both directions between the mixer and the computer, even at the
same time.
Note: The USB ports can only be used in connection with a computer. It will not be possible to directly
connect reproduction units or storage media with USB port to the mixer.
6. Connect the power supply unit to the AC IN jack of the EM-180 USB and the mains plug to a mains
socket. Use the unit only with the supplied OMINTRONIC power unit. Always disconnect the mains
connector when you wish to change connections, move the unit to a different place or if it is not used for a
longer period.

6. OPERATION

Prior to switching on, turn all level controls to position "0" to avoid damage to the hearing by a volume which
is too high when switching on. Switch on the unit with the power switch. The power indicator on the front
panel lights up. Switch on the connected units. After operation, switch off the unit with the power switch.

6.1 Basic adjustment of the input channels

First set all equalizer controls and the crossfader to mid-position.
Level control of a channel:
1. Use the input selector to select the input to which the audio source is connected.
2. The master control determines the total level of all connected audio sources. Set the control to approx. 2/3
of its maximum, e.g. to position "7".
3. Feed an audio signal (test signal or music piece) to the channel. Switch off the units which are to play on
the other channels or set them to pause.
4. Via the output meter, control the level of the respective channel with the level control. An optimum level
control is obtained if level values in the 0 dB range are shown at average volume. If the red LEDs of the
output meter light up, there is an overload of the channel.
5. Then adjust the desired sound with the tone controls of the channel. By adjusting both tone controls, the
high frequencies (control HIGH and the low frequencies (control LOW) can be boosted (12 dB max.) or
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