AUDAC MTX48 User manual

User Manual
MTX48/88
audac.eu

MTX48/88 - User manual02
ADDITIONAL INFORMATION
This manual is put together with much care, and is as complete as could be on the publication date.
However, updates on the specications, functionality or software may have occurred since publication. To
obtain the latest version of both manual and software, please visit the Audac website @ www.audac.eu.

MTX48/88 - User manual 03
Index
Introduction 05
Multi-zone matrix � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 05
MTX Block Diagram � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 06
Precautions 07
Chapter 1 010
Pin connections and connectors � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 010
Wire up the system � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 012
Chapter 2 013
Panel overview � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 013
MTX48 � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 013
MTX88 � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 013
Front panel functions � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 014
Functions overview � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 016
Rear panel overview � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 018
MTX48 � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 018
MTX88 � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 018
Chapter 3 021
MTX Quick start guide � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 021
Connecting the MTX � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 021
Conguring the MTX � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 022
Ready � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 023
Chapter 4 024
User interface & conguration � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 024
AUDAC TOUCH™2 � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 025
Login screen � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 027
Main screen � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 027
Device settings � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 029
Device Settings >> Password Settings � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 030
Device Settings >> Front Panel Settings � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 031
Device Settings >> Factory Defaults � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 031
Input settings � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 032
Output settings � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 033
Paging volume � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 034
Priorities � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 035
Network settings � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 036

MTX48/88 - User manual04
Chapter 5 037
Wall panels � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 037
Wall panel � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 038
MWX45 basic wall panel � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 038
MWX65 All-in-one wall panel � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 040
WP2xx series universal wall panels � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 041
MTX wall panel connection possibilities � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 042
Paging � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 044
Peripheral connection limits � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 045
Chapter 6 046
Additional information � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 046
IP Basics � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 046
Updating the MTX � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 047
Technical specications 048

MTX48/88 - User manual 05
Introduction
Multi-zone matrix
The MTX is AUDAC’s series of very cost efcient audio matrix systems for a wide range of Multi-Zone
audio applications, offering two different models with the same features and possibilities, but with different
zone capacities.
The MTX88 is the eight-zone version, and the MTX48 is the four-zone version.
Both containing two balanced microphone inputs with priority and phantom power possibility and three-
band tone control.
Four stereo line inputs are provided, where any music source can be connected, such as a smartphone,
laptop, tablet,... The other two inputs of the matrix can be used for additional wall panel inputs for both
line and microphone signals.
What makes the MTX system superior to all other matrix systems is its extensive control options. The
MTX can be controlled from additional wall panels for each specic zone, with or without additional audio
inputs. The MTX is also compatible with the Audac touch™2 app for smart devices. The RS232 port
makes it possible to control it from external home & industrial automation systems that support RS232.
The front panel of the MTX contains for every zone a rotary push button with indication LED’s whereby all
the controls and settings can be done. A built-in PFL loudspeaker makes it possible to pre-listen every
channel without requiring headphones.
The balanced line-level zone outputs are performed using 3-pin Euro-terminal block connectors, each of
them accompanied with an RJ45 connector for connecting additional wall panels to that zone.
A 24 volts power connection makes it possible to keep the MTX running on emergency power, even if
the mains power is shut down.
An EXT MUTE connection allows overall system muting. This is extremely useful in case of re-alarms or
other priority systems overruling the system settings.

MTX48/88 - User manual06
MTX Block Diagram
Mic 1
Gain
Control
Zone Output
Front Panel Controls
Mic 2
Line 3 Line 4 Line 5 Line 6
Remote input 1 (7) Remote input 2 (8)
Paging
TCP/IP
RS232 RS485
Zone 8
Zone 7
Zone 6
Zone 5
Zone 4
Zone 3
Zone 2
MATRIX
Zone 1
Webserver/ CPU
Tone Volume
8
7 6
5
4
2 3 1
VOLUME INPUT BASS TREBLE
8
7 6
5
4
2 3 1
VOLUME INPUT BASS TREBLE
8
7 6
5
4
2 3 1
VOLUME INPUT BASS TREBLE
8
7 6
5
4
2 3 1
VOLUME INPUT BASS TREBLE
8
7 6
5
4
2 3 1
VOLUME INPUT BASS TREBLE
8
7 6
5
4
2 3 1
VOLUME INPUT BASS TREBLE
8
7 6
5
4
2 3 1
VOLUME INPUT BASS TREBLE
8
7 6
5
4
2 3 1
VOLUME INPUT BASS TREBLE
POWER
PFL PFL PFL PFL PFL PFL PFL PFL
Zone 2 Zone 3 Zone 4 Zone 5 Zone 6 Zone 7 Zone 8
LEVEL
MTX88
Zone 1
Block diagram shown for MTX88 - 8 Zone Matrix

MTX48/88 - User manual 07
Precautions
READ FOLLOWING INSTRUCTIONS FOR YOUR OWN SAFETY
ALWAYS KEEP THESE INSTRUCTIONS. NEVER THROW THEM AWAY
ALWAYS HANDLE THIS UNIT WITH CARE
HEED ALL WARNINGS
FOLLOW ALL INSTRUCTIONS
NEVER EXPOSE THIS EQUIPMENT TO RAIN, MOISTURE, ANY DRIPPING OR SPLASHING LIQUID. AND NEVER PLACE AN OBJECT FILLED WITH
LIQUID ON TOP OF THIS DEVICE.
DO NOT INSTALL THIS UNIT NEAR ANY HEAT SOURCES SUCH AS RADIATORS OR OTHER APPARATUS THAT PRODUCE HEAT
DO NOT PLACE THIS UNIT IN ENVIRONMENTS WHICH CONTAIN HIGH LEVELS OF DUST, HEAT, MOISTURE OR VIBRATION
THIS UNIT IS DEVELOPED FOR INDOOR USE ONLY. DO NOT USE IT OUTDOORS
PLACE THE UNIT ON A STABLE BASE OR MOUNT IT IN A STABLE RACK
ONLY USE ATTACHMENTS & ACCESSORIES SPECIFIED BY THE MANUFACTURER
UNPLUG THIS APPARATUS DURING LIGHTNING STORMS OR WHEN UNUSED FOR LONG PERIODS OF TIME
ONLY CONNECT THIS UNIT TO A MAINS SOCKET OUTLET WITH PROTECTIVE EARTHING CONNECTION

MTX48/88 - User manual08
CAUTION-SERVICING
This product contains no user serviceable parts. Refer all servicing to qualied service personnel. Do
not perform any servicing (unless you are qualied to)
CAUTION
The symbols shown are internationally recognized symbols that warn about potential hazards of electrical
products. The lightning ash with arrow point in an equilateral triangle means that the unit contains
dangerous voltages. The exclamation point in an equilateral triangle indicates that it is necessary for
the user to refer to the users manual.
These symbols warn that there are no user serviceable parts inside the unit. Do not open the unit. Do
not attempt to service the unit yourself. Refer all servicing to qualied personnel. Opening the chassis
for any reason will void the manufacturer’s warranty. Do not get the unit wet. If liquid is spilled on the
unit, shut it off immediately and take it to a dealer for service. Disconnect the unit during storms to
prevent damage.
EC DECLARATION OF CONFORMITY
This product conforms to all the essential requirements and further relevant specications described
in following directives: 2014/30/EU (EMC) and 2014/35/EU (LVD)
WASTE ELECTRICAL AND ELECTRONIC EQUIPMENT (WEEE)
The WEEE marking indicates that this product should not be disposed with regular household waste
at the end of its life cycle. This regulation is created to prevent any possible harm to the environment
or human health.
This product is developed and manufactured with high quality materials and components which can be
recycled and/or reused. Please dispose this product at your local collection point or recycling centre
for electrical and electronic waste. This will make sure that it will be recycled on an environmentally
friendly manner, and will help to protect the environment in which we all live.

MTX48/88 - User manual 09
ATTENTION
The fuse (T500mAL/250V) provides a safeguard function to the device. When replacing the fuse,
make sure that the value of the replacement matches the value of the original fuse. Identication
of a suitable replacement component or substitute shall be done by qualied technicians.
POWER SUPPLY AND POWER CORD REQUIREMENTS
Power supply class I grounding requirements:
For protection from fault currents, the equipment shall be connected to a grounding terminal. Plug
the system power cord into an AC outlet that provides a ground connection. Substitute cords may
not provide adequate fault protection. Only use the power cord supplied with this product or an
authorized/equivalent replacement.
Safety notices:
Denmark:
Apparatets stikprop skal tilsluttes en stikkontakt med jord, som giver forbindelse til stikproppens jord.
Finland:
Laite on liitettävä suojakoskettimilla varustettuun pistorasiaan.
Norway:
Apparatet må tilkoples jordet stikkontakt.
Sweden:
Apparaten skall anslutas till jordat uttag.

MTX48/88 - User manual010
Chapter 1
Pin connections and connectors
CONNECTION STANDARDS
The in- and output connections for AUDAC audio equipment are performed corresponding to international wiring standards
for professional audio equipment.
3-Pin Terminal block:
Left:
Center:
Right:
For balanced line output connections.
For balanced line output connections. For unbalanced line input connections.
Signal -
Signal +
Ground
+
RCA (COAXIAL):
For unbalanced line input connections.
Tip:
Sleeve:
Signal
Ground
PIN 1:
PIN 2:
PIN 3:
Ground
Signal +
Signal -
XLR
For balanced microphone input connections.
R
L

MTX48/88 - User manual 011
RS232 (serial connection interface):
For connection with home automation systems, or other remote control equipment
Connection Standard RS232
PIN 2 MTX TX
PIN 3 MTX RX
PIN 5 GND
Settings 19200 Baud
8 Bit
1 Stop bit
No parity
No Handshaking
RS232 & RS485 & TCP/IP
The MTX has RS232, RS485 and TCP/IP ports which all accept the same commands. The complete command set to
control the MTX is available in the MTX commands user manual which is freely downloadable on www.audac.eu
ATTENTION
The twisted pair cabling must always be ‘straight’. In case of self-made cabling it must be wired as described above, to
ensure a proper functioning of the system.
RJ45 (RS485, Audio, +24V DC):
For connection to wall panels
For connection to paging consoles
Pin 1 White-orange Remote Input 1+
Pin 2 Orange Remote Input 1-
Pin 3 White-green +24V DC
Pin 4 Blue RS485 A
Pin 5 White-blue RS485 B
Pin 6 Green GND
Pin 7 White-brown Remote Input 2+
Pin 8 Brown Remote Input 2-
Pin 1 White-Orange Not used
Pin 2 Orange Not used
Pin 3 White-Green +24V DC
Pin 4 Blue RS485 A
Pin 5 White-Blue RS485 B
Pin 6 Green GND
Pin 7 White-Brown Paging audio +
Pin 8 Brown Paging audio -
1
1
PIN1
PIN1
RJ-45

MTX48/88 - User manual012
The wiring of the system must be done according to the following rules, to guarantee a proper functioning of the
system in all circumstances.
1. Wall Mounted Input & Control units:
MWX45 UTP/FTP Cat5e cable or better
MWX65 UTP/FTP Cat5e cable or better
MPX48/88 UTP/FTP Cat5e cable or better
WLI18/WMI16 UTP/FTP Cat5e cable or better
APM1xxMkII UTP/FTP Cat5e cable or better
2. Speaker cable for amplied zone outputs:
Minimum 2 x 1.5 mm²
If distance > 15 m: 2 x 2.5 mm²)
3. Music sources and zone outputs:
Must be connected with high-quality audio cable and high-quality connectors
4. Ethernet connection:
UTP/FTP Cat5e cable or better
Wire up the system

MTX48/88 - User manual 013
Front panel overview
Chapter 2
Panel overview
MTX48
MTX88
The front panel of the MTX enables you to fully control and congure the settings of every output zone.
Every output zone contains its own specic control section, including one rotary function dial, four function
indication LED’s, and eight level / selection indication LED’s.
A built-in pre-listening loudspeaker makes it possible to pre-listen every output channel without requiring
additional headphones. The channel which is currently playing through the built-in pre-listening loudspeaker
can be selected by means of the PFL selection switches which are provided with each zone control
section. The level of the PFL loudspeaker can be controlled by using the PFL potentiometer.
On the right side there is a power button provided. Simply push this button to power-up the system.
POWER
Zone 2
LEVEL
MTX48
ON
VOLUME
INPUT
BASS
TREBLE
8
7
6
5
4
3
2
1
PFL
Zone 3 Zone 4 PFL
Zone 1
VOLUME
INPUT
BASS
TREBLE
8
7
6
5
4
3
2
1
PFL
VOLUME
INPUT
BASS
TREBLE
8
7
6
5
4
3
2
1
PFL
VOLUME
INPUT
BASS
TREBLE
8
7
6
5
4
3
2
1
PFL
POWER
Zone 2
LEVEL
MTX88
ON
VOLUME
INPUT
BASS
TREBLE
8
7
6
5
4
3
2
1
PFL
Zone 3 Zone 4 Zone 5 Zone 6 Zone 7 Zone 8 PFL
Zone 1
VOLUME
INPUT
BASS
TREBLE
8
7
6
5
4
3
2
1
PFL
VOLUME
INPUT
BASS
TREBLE
8
7
6
5
4
3
2
1
PFL
VOLUME
INPUT
BASS
TREBLE
8
7
6
5
4
3
2
1
PFL
VOLUME
INPUT
BASS
TREBLE
8
7
6
5
4
3
2
1
PFL
VOLUME
INPUT
BASS
TREBLE
8
7
6
5
4
3
2
1
PFL
VOLUME
INPUT
BASS
TREBLE
8
7
6
5
4
3
2
1
PFL
VOLUME
INPUT
BASS
TREBLE
8
7
6
5
4
3
2
1
PFL

MTX48/88 - User manual014
Front panel functions
The control section for every zone contains one rotary function dial, four function indication LED’s and eight level /
selection indication LED’s.
By means of the function indication LED’s, the current operating function will be indicated. The upper LED
stands for volume adjustment, the second LED stands for input channel selection, the third LED will blink
when Bass tone adjustment is enabled, and the fourth LED will blink when Treble tone adjustment is enabled.
The selection of which function has to be controlled can be done by pressing the rotary function dial. When
pressing the rotary function dial, the ‘Volume’ LED will illuminate. Changing to the desired function can be done
by rotating the function dial. The currently set level / selection will appear when the function is selected. When any
change needs to be made to the level / selection, the rotary button should be pressed a second time. The LED of
the selected function will start blinking now, and any rotation to the function dial will affect the set level / selection.
When the level / selection is changed to the desired level and any other change needs to be made, you can return
to function selection by pressing the rotary button again. The settings menu will be quit automatically when the rotary
dial is not operated for about 6 seconds.
Volume adjustment:
When no function is selected (MTX in idle status) and the function dial is rotated, the volume adjustment function
will be automatically activated. The volume LED will start blinking and the current volume level will illuminate on
the level / selection LED’s. Manual switching to volume mode can also be done, by the procedure as described
above. The level / selection LED’s will indicate the currently set volume level. Only a few illuminated LED’s
correspond with a low volume level, and many illuminated LED’s correspond with a high volume level. Rotating the
rotary function dial in clockwise direction results in an increasing volume level and rotating in counter-clockwise
direction results in a decreasing volume level.
Input selection:
The desired input channel for every zone can be selected. Every LED corresponds with an input channel, and the
corresponding LED for the selected input channel will illuminate when selected. Switching between the different
input channels can be done by rotating the function dial. The table shown below gives an overview of which
number corresponds with which input channel.
Rotary function
dial
Level / Selection
indication LED’s
Function
indication-LED’s
PFL switch
Zone 1
VOLUME
INPUT
BASS
TREBLE
8
7
6
5
4
3
2
1
PFL

MTX48/88 - User manual 015
Bass en Treble adjustment:
The Bass and Treble adjustment can be done on a similar way. When the desired function is selected, the
corresponding function LED will start blinking. The adjustment can be done by rotating the function dial. Similar to
the volume adjustment, clockwise rotation results in a level increase while counter-clockwise rotation results in a
level decrease. When the level is set in neutral position (0 dB), no LED’s of the level / selection LED’s will illuminate.
When an amplication (dB +) is selected, the upper four LED’s will illuminate from out the centre, depending on
the selected level. When an attenuation is selected (dB -), the lower four LED’s will illuminate from out the centre,
depending of the selected level.
Built-in PFL loudspeaker and potentiometer:
The built-in pre-listening loudspeaker makes it possible to pre-listen every output channel without the need for an
additional headphone. The channel which is currently playing through the built-in pre-listening loudspeaker can be
selected by means of the PFL selection switches which are provided with each zone control section. The level of
the PFL loudspeaker can be controlled by using the PFL potentiometer.
Power switch:
By means of the power switch, the device can be turned ON and OFF. When the device is switched on, the blue
LED above the power button will illuminate.
Input number Corresponding channel
1
2
3
4
5
6
7
8
Microphone Input 1
Microphone Input 2
Line input 3
Line input 4
Line input 5
Line input 6
Remote input 1 (7)
Remote input 2 (8)
POWER
LEVEL
MTX88
ON
PFL
Power switch
Built-in PFL
loudspeaker
PFL level
Potentiometer

MTX48/88 - User manual016
Functions overview
Operating functions
Change
volume
- Set function LED to ‘Volume’
- Push rotary dial once
- Rotate function dial to desired volume level
-> The indication LED’s show the selected volume level
- Push rotary dial once to return back to main menu
Change
routing
- Set function LED to ‘Routing’
- Push rotary dial once
- Rotate function dial to desired input channel
-> The indication LED’s show the selected input channel (1-8)
- Push rotary dial once to return back to main menu
Change bass - Set function LED to ‘Bass’
- Push rotary dial once
- Rotate function dial to desired bass level
-> The indication LED’s show the selected level
- In neutral position, all LED’s are off
- Increased level causes upper LED’s to illuminate
- Decreased level causes lower LED’s to illuminate
- Push rotary dial once to return back to main menu
Change treble - Set function LED to ‘Treble’
- Push rotary dial once
- Rotate function dial to desired treble level
-> The indication LED’s show the selected level
- In neutral position, all LED’s are off
- Increased level causes upper LED’s to illuminate
- Decreased level causes lower LED’s to illuminate
- Push rotary dial once to return back to main menu
Pre-fade listen - Press PFL button
-> Selected channel now plays through the built-in loudspeaker
Save settings - Hold rotary button for Zone 1 and Zone 2 for 3 seconds
-> Saved settings will be recalled after MTX restart
Conguration functions
Priority 1
Enable /
Volume
(per zone)
Priority message from Microphone Input 1 will be announced to priority
enabled zones.
- Set LED for corresponding zone to ‘Volume’
- Hold rotary button for corresponding channel down for 3 seconds
(Volume LED starts blinking)
- Priority can be enabled and volume can be set by rotating the button
(Priority is disabled when volume is set to zero)
- Press rotary button once again to return back to main menu

MTX48/88 - User manual 017
Conguration functions
Priority 2
Enable /
Volume
(per zone)
Priority message from Microphone Input 2 will be announced to priority
enabled zones.
- Set LED for corresponding zone to ‘Routing’
- Hold rotary button for corresponding channel down for 3 seconds
(Routing LED starts blinking)
- Priority can be enabled and volume can be set by rotating the button
(Priority is disabled when volume is set to zero)
- Press rotary button once again to return back to main menu
Paging Volume
(per zone)
Paging volume for message from External Paging Console can be set.
- Set LED for corresponding zone to ‘Bass’
- Hold rotary button for corresponding channel down for 3 seconds
(Bass LED starts blinking)
- Paging volume can be set by rotating the button
(Paging is disabled when volume is set to zero)
- Press rotary button once again to return back to main menu
Mono / Stereo
output
(per zone)
Output signal for each zone can be switched between Mono and Stereo
- While powering-up the device, hold the rotary button for Zone 1.
The Mono / Stereo settings menu will be displayed
- Toggling between Stereo or Mono mode can be done by using each
zones’ rotary button
- LED 1: Zone set to Mono
- LED 2: Zone set to Stereo
- Power off and Power on the device again to go back to normal
operation mode.
Set wall panel
address
Connected wall panels can be assigned to one zone.
- Set LED for corresponding zone to ‘Treble’
- Hold rotary button for corresponding channel down for 3 seconds
(All connected wall panels will start blinking)
- Press upper button from the wall panel to assign this wall panel to the
corresponding zone
- Repeat this action to assign multiple wall panels to this zone

MTX48/88 - User manual018
Rear panel overview
MTX48
MTX88
The rear side of the MTX contains all different kinds connectors which are necessary to connect the device.
Power, Mute, RS232, Ethernet & Paging connectors:
Power inlet:
The mains power supply (110~240V AC / 50~60 Hz) has to be applied to this AC power inlet. The connection is
made by an IEC power connector and is tted with a fuse. When replacing the fuse, make sure that the value of the
replacement fuse matches the value of the original fuse. (T1AL/250V)
Emergency power inlet (24 Volt):
A 24 Volts emergency power supply can be connected to this 2-pin Terminal block connector for keeping the
MTX running on emergency power when the mains power is shut down. When the MTX is running on 24 Volt
emergency power, the function of the power switch on the front panel is bypassed and can’t switch the MTX off.

MTX48/88 - User manual 019
Mute connection:
A priority mute contact connection is present which allows complete muting of background music at presence of a
contact closure between both ‘MUTE’ contacts.
This Contact is convenient for situations where a for example a separate emergency system is installed and
complete background music muting is required. For example at the occasion of a re alarm. The emergency
system output contacts can be linked to this contact input.
RS232 connection:
The RS232 connection can be used to control the MTX from external hardware such as a home automation
system or computer. Connect your external control hardware to this port. The pinout and communication settings
are described earlier in this user manual. The complete RS232 control commands and conguration information
can be downloaded from www.audac.eu.
Ethernet RJ45 connector:
This connector should be connected to a LAN network. This makes it possible to control the MTX via the internet.
The control is possible by sending commands via TCP/IP using a specially developed app, AUDAC Touch™2,
which is designed to be used with smartphones or tablets. See ‘Chapter 4: User interface & conguration’ and
‘Chapter 6: IP basics’ for more information on the Ethernet conguration of this device.
Paging RJ45 connector:
The (optional) MPX paging consoles must be connected to the ‘PAGING’ RJ45 connector. This allows to announce
messages through the microphone of the paging console to all the zones of the MTX. The selection of which
announcements should be made in which zone can be done on the control panel of the MPX paging consoles.
(MPX48-4 zone for MTX48 and MPX88-8 zone for MTX88)
Wall panel & zone exit connectors:
Wall panel RJ45 connector:
Every zone has its specic Wall Panel (WP) RJ45 connector where additional wall panels can be connected to.
Every zone has the possibility to connect an additional Line and Microphone input unit and multiple wall panel
controllers. On these ports are both digital RS485 control signals as well as differential audio signals transmitted.

MTX48/88 - User manual020
Zone outputs (Terminal Block):
The zone outputs of the MTX are stereo (switchable to mono) balanced line-level outputs. Depending on the
requirements for each specic application, the suitable ampliers should be connected to these output connectors.
The used connectors are 3-pin Terminal-Block connectors.
Input connectors:
RCA / Cinch line inputs:
Unbalanced Line-Level input sources (E.g. smartphones, Tuners, laptops, ... ) should be connected to the Line
level inputs Line 3 to Line 6. These are standard line-level stereo inputs performed with RCA connectors. All of
them have a gain control potentiometer whereby the level of the input signal can be controlled within a range of -14
dB ~ +9 dB.
The clipping LED illuminates when the signal reaches the clipping level.
Balanced microphone inputs:
Balanced mono sources (E.g. Microphones) should be connected to inputs Mic 1 and Mic 2. Both channels are
performed with Female XLR connector provided with gain control potentiometer whereby the level of the input
signal can be controlled within a range of -50 dB ~ 0 dB. This makes it possible to connect both Line level input
sources as well as Microphone level input sources. The clipping LED illuminates when the signal reaches the
clipping level.
In addition, both channels have a three-band tone control, whereby specic frequency ranges can be adjusted
within a range of ± 15 dB and a phantom power switch, whereby the 15 Volts phantom power can be enabled for
powering condenser microphones.