Connecting The Units; Audio Sources; Microphones; Line Audio Sources - IMG STAGE LINE PMX-122FX Instruction Manual

4 Connecting the Units

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To avoid interfering noise, switch off the mixer or
close the appropriate faders / set the appropriate
controls to minimum in the corresponding chan-
nels prior to connecting / disconnecting.

4.1 Audio sources

In the mono input channels, it is not possible to
switch between the microphone input (16) and
the line input (15). Therefore, only connect one
of these two inputs per channel.

4.1.1 Microphones

Connect microphones to the balanced XLR
jacks MIC (16). For phantom-powered micro-
phones, the switches PHANTOM (18) are avail-
able: With each of these switches, a phantom
power supply of 48 V for four microphone inputs
can be switched on. When a phantom power
supply is switched on, the LED next to the corre-
sponding switch will light up.
Caution: When the phantom power supply is
switched on, do not connect any microphone
with unbalanced output; it may be damaged.
To prevent switching noise in the speakers and
the headphones, only switch the phantom
power supply on or off when the mixer has been
switched off or when the corresponding buttons
MUTE (4) have been pressed and the control
PHONES / CTRL-ROOM (42) has been set to
minimum.

4.1.2 Line audio sources

Connect audio sources with line signal level
(e. g. receivers of wireless microphone systems,
effect units, instruments, players) to the 6.3 mm
jacks LINE IN (14, 15) of the input channels. The
jacks are balanced. To connect units with unbal-
anced output, use 2-pole 6.3 mm plugs.
— Connect mono units to the jacks (15) of the
mono channels CH 1 to CH 12. To connect a
mono unit to a stereo channel, only use the
upper jack LEFT (MONO); the mono signal
will then be internally sent to the right and left
channels.
— Connect stereo units to the jacks (14) of the
stereo channels CH 13/14 and CH 15/16.
It is also possible to connect stereo units to
two mono channels: For the mono channel to
which the left channel of the stereo unit is
connected, turn the control PAN (5) to the left
stop to the position "L"; for the mono channel
to which the right channel is connected, turn
the control PAN to the right stop to the posi-
tion "R".
The following stereo inputs can be used to con-
nect additional line sources:
1. inputs AUX RETURN 1 and 2 (28)
To connect a mono unit, only use the jack
LEFT (MONO); the mono signal will then be
internally sent to the right and left channels.
2. input AUX IN / TAPE IN (29)
e. g. to connect a CD player for background
music during intervals
14

4.2 Effect units

4.2.1 Inserting effect units

Effect units (e. g. units for audio processing such
as compressors, equalizers and noise gates)
may be directly inserted into the mono channels:
The channel signal is decoupled after the control
TRIM (12) and the low cut filter (11), is routed via
the effect unit and is then returned to the chan-
nel at the same position in the signal way.
Connect the effect unit to the 6.3 mm jack
INSERT (13) of the respective channel. The
plugs must be connected as follows:
tip = Send (output)
ring = Return (input)
sleeve = Ground
To connect effect units with separate input and
output jacks, Y cables are required, e. g. MCA-
202 from MONACOR:
Fig. 7 Connection via Y cable MCA-202

4.2.2 Using send ways

Via the send ways AUX 1 – 4, signal parts can be
decoupled from the input channels, processed
by means of effect units (e. g. reverb units) and
returned to the mixer via the Return inputs. Nor-
mally, the signal for a send way used as an effect
way is picked up post-fader, i. e. the channel sig-
nal is added to the send way after the fader (1).
Thus, the effect part of a channel is always in
proportion to the channel level adjusted.
For each channel, the switch PRE / POST (8)
can be used to switch the send ways AUX 1 and
AUX 2 over between post-fader and pre-fader.
The send ways AUX 3 and AUX 4 are preset to
post-fader; this cannot be changed. The send
ways AUX 3 and AUX 4 also serve as effect
ways for the internal effect processors.
1) Depending on the send way used, connect
the input of the effect unit to the correspond -
ing mono output AUX SENDS 1, 2, 3 or 4
(38).
2) Return the signal coming from the effect unit
to one of the inputs AUX RETURN (28).
Note: To connect a mono unit, only use the jack
LEFT (MONO); the signal will then be internally sent
to the right and left channels.
3) Alternatively, feed the signal from the effect
unit to the line input of an available input
channel CH 1 – 16.
Hint: For adding an effect signal to a send way, an
unused input channel must be available, because
this addition can only be carried out with the con-
trols AUX 1 – 4 (7, 9).

4.3 Recorder

A recorder can be connected to the jacks AUX
IN/ TAPE IN and TAPE OUT (29) [L= left chan-
nel, R = right channel]:
1) For recording, connect the input of the
recorder to the RCA jacks TAPE OUT. At
these jacks, the sum signal adjusted by
means of the fader MAIN MIX (39) is avail-
able.
2) For monitoring the recording via the mixer
(chapter 5.7), connect the output of the
recorder to the RCA jacks TAPE IN or to the
3.5 mm jack AUX IN.
4.4 Connecting a control monitor
system or headphones
The following signals can be monitored via head-
phones or via a control monitor system:
– the signals of the individual input channels
– the stereo sum signal
– the mono sum signal
– the input signals of the jacks AUX RETURN 1
and 2 (38)
– the signals of the inputs AUX IN / TAPE IN (29)
Connect the headphones (minimum impedance:
8 Ω) or the control monitor system to the jack
PHONES / CTRL-ROOM (51).

4.5 Monitor system for the musicians

When a monitor system is used for stage PA
applications, the send ways AUX 1 and AUX 2
can be used as monitor ways to provide the
musicians with music signals that have been
especially mixed for them.
The signals for the monitor system can be
picked up at the jacks AUX SENDS 1 and 2 (38).
Alternatively, one channel of the internal power
amplifier can amplify the signal AUX 1 for the
monitor speakers and the other channel can
amplify the signal AUX 2: Set the assignment
switch (37) to mid-position. Please refer to chap-
ter 4.7 for information on how to connect the

speaker systems.

4.6 Additional amplifiers
for the sum signal
The internal power amplifier can be used to pro-
duce the sound for the audience. If the internal
power amplifier does not suffice or if it is used to
provide the musicians with sound for on-stage
monitoring or if the sum signal shall be audible in
an additional room, connect an additional ampli-
fier to the output MAIN MIX OUT (53). At this out-
put, the sum signal adjusted by means of the
fader MAIN MIX (39) is available. The RCA jacks
TAPE OUT (29) can be used as an alternative or
in addition.
For monophonic PA applications, the output
MONO (52) can be used. At this output, the
mono sum signal adjusted by means of the fader
MONO (30) is available. The internal power
amplifier may be used for monophonic PA appli-
cations as well (see chapter 4.7).
4.7 Speaker systems
For connecting the speaker systems, the
speaker jacks (57) or the SPEAKON
ble jacks (58) are available. If the SPEAKON
compatible jacks are used, insert the appropriate
speaker plug into the jack and then turn the
plug clockwise until it engages. To remove the
speaker plug, retract the latch of the plug and
turn the plug counterclockwise.
The correct connection of the speaker sys-
tems depends on the desired operation mode for
the power amplifier. This mode is adjusted by
means of the assignment switch (37):
Stereo operation (switch in upper position)
The power amplifier amplifies the stereo sum
signal. Connect the speaker systems (minimum
impedance: 4 Ω) to the jack A (left channel) and
to the jack B (right channel).
2-channel operation (switch in mid-position)
In the channel A, the power amplifier amplifies the
signal of the send way AUX 1; in the channel B,
it amplifies the signal of the send way AUX 2.
Connect the speaker system (minimum imped-
ance: 4 Ω) for the signal AUX 1 to the jack A, and
connect the speaker system (minimum imped-
ance: 4 Ω) for the signal AUX 2 to the jack B.
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