Setting Up And Connections; 4�1 Microphones; 4�2 Audio Sources With Line Level; 4�3 Computer For Stereo Recording/Reproduction - IMG STAGELINE DMIX-20 Manual De Instrucciones

rectly connected or operated, or if it is not repaired in an expert
way� Likewise, no liability will be accepted for data loss caused by
a defect or operating errors and for any consequential damage of
this data loss�
If the unit is to be put out of operation definitively, take it
to a local recycling plant for a disposal which is not harmful
to the environment�

4 Setting Up and Connections

Place the mixer on a flat surface� As an alternative, attach the brackets
supplied to the mixer and then install the mixer in a rack� In order to
ensure sufficient cooling of the amplifier, air must always be able to
flow freely through all air vents�
It is recommended to make or change connections with the units
switched off; always mute the inputs and turn back the outputs to
minimum; otherwise, signal peaks that occur when connections are
made at a high gain may damage the speakers, for example�
4.1 Microphones
Connect microphones with an XLR plug to the jacks MIC / LINE (27)� For
microphones that require phantom power, a separate 48 V phantom
power supply can be activated for each channel during operation
☞
( chapter 5�1�1)�
4.2 Audio sources with line level
Connect audio sources with line level (e� g� CD/MP3 player, tuner,
keyboards, effect units) to the 6�3 mm jacks of the connections MIC/
LINE (27)�
Stereo audio sources can be connected to the stereo inputs 17/18
or 19/ 20 or to two adjacent mono channels (e� g� 1/ 2, 3/4, ..., 15 /16)
that can be linked as a stereo pair� To use the stereo channels 17/18
or 19/ 20 with a mono signal, only connect the jack L; the signal will
then be routed to both stereo channels�
4.3 Computer for stereo recording/reproduction
To reproduce, for example, audio files stored on a computer via the
mixer or to record the signal of the stereo sum MAIN by means of
the computer, connect the jack USB AUDIO (35) to a USB port of
the computer� When making the connection for the first time, make
the connection during operation: The computer will recognise the
switched-on mixer as the USB audio unit for audio input and audio
output� The required drivers (standard drivers of the operating system)
are available on the computer�
Note: If the required drivers are not available on the computer, install them, e� g�
by means of the original operating system CD� If necessary, reboot the computer
after the installation�
4.4 Computer for multi-channel recording / reproduction
For multi-channel recording via a computer, an additional module is
required� To install the module, disconnect the mains cable from the
mains socket and then remove the cover plate (41) from the module
compartment� Push the module into the compartment to the stop so
that the PCB of the module fits into the left and right guides of the
compartment�
Connect the USB jack of the module to a USB port of the com-
puter�
4.5 Front-of-house PA system
Connect the front-of-house PA system to the XLR jacks or the 6�3 mm
jacks of the output MAIN OUT (37)� The outputs are balanced� In
addition to the main speakers, specific areas may be provided with
support speakers whose amplifiers are controlled via the subgroup
outputs SUB OUT (29) of the mixer� The subgroup signals can be
separately delayed to compensate sound delay times�
4.6 Amplification system for stage monitors
The Aux ways are designed for stage monitors� Connect the amplifiers
for the monitor speakers, the active monitors or the in-ear monitor
systems to the jacks AUX OUT (30)� If more than four Aux ways
are required, the four subgroups can be converted into Aux ways
☞
( chapter 6�2�1) so that the jacks SUB OUT (29) are available as
AUX 5 – 8 for additional monitors�
4.7 Effect unit
Various options for integrating external effect units are available:
– Connect an AUX output (30) to the input of the effect unit and
return the output of the effect unit to an input channel LINE IN
☞
( chapter 4�2)�
Thus, the AUX Send control can be used to adjust the part of each
channel in the effect signal� To add the effect signal to the signal
of the sum channel MAIN, of a subgroup or of another Aux way,
adjust the level of the input channel of the respective effect signal�
– Connect a SUB output (29) to the input of the effect unit and
return the output of the effect unit to an input channel LINE IN
☞
( chapter 4�2)�
Thus, the effect can be applied for all channels that are assigned to
the corresponding subgroup� To add the effect signal to the signal
of the sum channel MAIN, of a subgroup or of another Aux way,
adjust the level of the input channel of the respective effect signal�
– Use a Y cable (e� g� MCA-202 from MONACOR) to connect an effect
unit to one of the jacks INSERT (31)�
black
SEND
red
RETURN
black
RETURN SEND
Fig. 3 Configuration of the insert cable
Thus, the input signal of the respective channel will, after passing the
input gain, be routed through the effect unit and will then, ahead
of dynamic-range processing and sound adjustment, be returned
to the same input channel�
4.8 Recorder
To record the stereo sum, connect a recorder to the 6�3 mm jacks
of the output MAIN (37)� These jacks are balanced� For a separately
mixed recording signal, use the Aux ways; in this case, connect the
recorder to the unbalanced jacks AUX OUT (30)�
4.9 Headphones, monitoring system
To monitor the signals via the Solo bus, connect stereo headphones
to the 6�3 mm jack HP1 (26) or HP2 (28)� To send the same signal with
a separate level setting to a monitor system in the control room, for
example, use the outputs CTRL OUT (36)�

4.10 Computer/ Network for remote control

For future remote-control options of the mixer via a computer, use
the jack USB (39) or the jack ETHERNET (40)� To update the firmware
of the mixer, connect the computer to the jack USB (39)�

4.11 Power supply

Connect the mains cable supplied with the mixer to the mains jack (33)
and a socket (230 V/50 Hz)�
input
effect unit
output
effect unit
insert jack
mixer
27