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Audio Mixer
These operating instructions are intended for
users with basic knowledge in audio tech-
nology . Please read the instructions carefully
prior to operation and keep them for later
reference .
All operating elements and connections
described can be found on the fold-out page 3 .
1 Operating Elements
and Connections
The figures on page 3 show model MMX-
24USB . Model MMX-44, equipped with two
additional mono input channels, features
the same operating elements and connec-
tions except for the USB interface and the
corresponding additional functions for USB
operation .
1.1 Front panel
Figure shows the example of a mono
channel and a stereo channel; the other input
channels are identical .
1
Input MIC to connect a microphone
(XLR jack, bal .)
Note:
Phantom power can be activated for all
microphone inputs
☞
item 22 .
2
Input LINE to connect a unit with line sig-
nal level (e . g . musical instrument)
Mono channel:
1 × 6 .3 mm jack, bal .
Stereo channel:
1 × 6 .3 mm jack, Left L, bal .
1 × 6 .3 mm jack, Right R, bal .
To connect a mono unit, only use the
jack L .
3
Control GAIN for input amplification
4
Equalizer for HIGH, MID and LOW
5
Button
for the low-cut filter (high-
pass filter); when the button is pressed,
unwanted signal parts below 75 Hz (e . g .
impact noise) will be suppressed
6
4 / −10 for matching the level of
units with low line output level; when the
button is pressed, the input level will be
boosted
7
Control AUX SEND to add the channel sig-
nal to the effect send way; the signal will
be picked up after the control LEVEL (10)
8
Mono channel:
Panorama control PAN to place the mono
signal in the stereo sound
Stereo channel:
Balance control BAL for the stereo signal
9
Overload LED PEAK; if its lights perma-
nently, turn back the GAIN control (3)
and/or the equalizer controls (4) accord-
ingly (mono channel) or disengage the
4 / −10 (6) (stereo channel)
10
Control LEVEL to add the channel signal
to the signal sum
11
Output MASTER OUT for the sum signal
(6 .3 mm jacks Left L / Right R, unbal .), e . g .
to connect the amplifier for PA applica-
tions or a second mixer
12
Output BOOTH OUT (6 .3 mm jacks Left L /
Right R, unbal .) to connect the amplifier
of a monitor system in a separate control
room
13
Output AUX SEND (6 .3 mm jack, unbal .)
of the effect send way, to connect the
input of an effect unit
14
Output PHONES (6 .3 mm jack) to connect
stereo headphones (minimum impedance
8 Ω)
15
LED level indicators, to indicate
– the sum signal adjusted with the control
MASTER (16) when none of the but-
tons (20, 21) for the monitor function
is pressed
or
– the monitor signal selected with the cor-
responding button (
☞
item 20 or 21)
16
Total level control MASTER for the audio
mix (sum of all signals);
the sum signal is sent via the jacks
MASTER OUT (11), TAPE OUT (18) and
the USB port (28)* and can be monitored
via the outputs BOOTH OUT (12) and
PHONES (14)
17
Input TAPE IN (RCA jacks Left L / Right R)
to connect the output of a recorder or
another player, e . g . CD player
18
Output TAPE OUT (RCA jacks Left L /
Right R) to connect the input of a recorder
19
Button TAPE [/ USB*] TO MIX; when the
button is pressed, the input signal of the
jacks TAPE IN (17) and of the USB port
(28)* is added to the sum signal
20
Button TAPE TO BOOTH / PHONES; when
the button is pressed, the input signal of
the jacks TAPE IN (17) and of the USB
port (28)* is sent to the monitoring out-
puts BOOTH OUT (12) and PHONES (14)
and indicated by means of the LED level
indicators (15)
Note:
When the button AUX SEND TO BOOTH
(21) is pressed in addition, it will take priority, i . e .
the effect way will be monitored and indicated .
21
Button AUX SEND TO BOOTH; when the
button is pressed, the signal of the effect
way is sent to the monitoring outputs
BOOTH OUT (12) and PHONES (14) and
indicated by means of the LED level indi-
cators (15), ahead of the output control
AUX SEND MASTER (25)
22
Button PHANTOM 48 V (with LED); press
the button to activate a 48 V phantom
power for all inputs MIC (1)
Please observe the warning notes with re-
gard to phantom power in chapter 4 .1 .1 .
23
Volume control BOOTH / PHONES for the
monitoring outputs BOOTH OUT (12) and
PHONES (14)
24
LED POWER ON
25
Level control AUX SEND MASTER for the
sum signal of the effect send way at the
output AUX SEND (13)
1.2 Rear panel
26
Power supply jack to connect the power
supply unit provided
27
On / off switch of the mixer
28
For model MMX-24USB only:
USB port (type B) to connect a computer;
can be used as an output (for digital out-
put of the sum signal) and as an input (to
feed in audio data)
2 Safety Notes
The units (mixer and power supply unit) cor-
respond to all relevant directives of the EU
and are therefore marked with .
WARNING
The power supply unit uses
dangerous mains voltage .
Leave ser vicing to skilled per-
sonnel . Inexpert handling or
modification may re sult in elec-
tric shock .
•
The units are suitable for indoor use only .
Protect them against dripping water and
splash water, high air humidity and heat
(admissible ambient temperature range:
0 – 40 °C) .
•
Do not place any vessel filled with liquid on
the units, e . g . a drinking glass .
•
The heat generated inside the mixer must
be dissipated by air circulation; never cover
the air vents of the housing .
•
Do not operate the mixer and immediately
disconnect the power supply unit from the
socket
1 . if the mixer or the power supply unit is
visibly damaged,
2 . if a defect might have occurred after a
unit was dropped or suffered a similar
accident,
3 . if malfunctions occur .
In any case the units must be repaired by
skilled personnel .
•
For cleaning only use a dry, soft cloth; never
use water or chemicals .
•
No guarantee claims for the units and no
liability for any resulting personal damage
or material damage will be accepted if the
units are used for other purposes than
originally intended, if they are not correctly
connected or operated, or if they are not
repaired in an expert way .
If the units are to be put out of oper-
ation definitively, take them to a local
recycling plant for a disposal which is
not harmful to the environment .
English
English Page
* for model MMX-24USB only
