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Chapter 2

Overview ATU44

MK2

The panel of the ATU44

MK2 

contains all connections for the loudspeaker level and line 

in & outputs, accompanied with an input selector switch. 

1) Loudspeaker input:

The loudspeaker input is implemented using a 5-pin terminal block connector with 
various tappings for 100V, 70V, 50V and 33V audio levels. Depending of the available 
audio level, the input signal shall get connected to the appropriate tappings.

2) Balanced line level input:

The balanced line level input is implemented using a 3-pin terminal block connector. 
Line level input signals (balanced or unbalanced) shall be connected to this terminal.

3) Input selector switch:

This switch allows selection of the input signal between line level (left position) or 
loudspeaker level (right position) inputs.

4) Balanced line level output:

The balanced and galvanic isolated output signal connection is available on the female 
XLR connection. The level of this output connection matches line level (depending of 
matching input levels), allowing it to be fed directly to any line level input on amplifiers 
or pre-amplifiers.

Summary of Contents for ATU44MK2

Page 1: ...ATU44MK2 User Manual www audac eu ...

Page 2: ...2 ...

Page 3: ... servicing 6 EC Declaration of Conformity 6 Waste of Electrical and Electronic Equipment WEEE 6 Chapter 1 Connections and connectors 8 Connection standards 8 Chapter 2 Overview ATU44MK2 9 Block diagram 10 Chapter 3 Connections 10 Chapter 4 Technical specifications 11 ...

Page 4: ... loudspeaker level signal can get applied to its input This can be useful for expansion of any constant voltage distributed audio system and feeding the transformed output to an additional amplifier Another typical application is connection of recording equipment on loudspeaker lines Using the galvanic isolation between all the in outputs it can be used as an audio isolation solution solving hum a...

Page 5: ... OR OTHER APPARATUS THAT PRODUCE HEAT DO NOT PLACE THIS UNIT IN ENVIRONMENTS WITH A HIGH LEVEL 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...

Page 6: ...llection point or recycling centre for electrical and electronic waste Do this to make sure that the product is recycled in an environmental friendly way and help to protect the environment in which we all live CAUTION The symbols shown are internationally recognized symbols that warn about potentional hazards of electrical products The lightning flash with arrowpoint in an equilateral triangle me...

Page 7: ...h much care and effort and is as complete as could be on the publication date However updates on the specifications and functionality may have occurred since publication To obtain the latest version of this manual please visit the Audac website www audac eu ...

Page 8: ...ng standards for professional audio equipment XLR For balanced line output connections Pin 1 Ground Pin 2 Signal Pin 3 Signal ATTENTION Make sure the power of the device and other connected devices is switched off before any connections or wiring adjustments are being made Disregarding this rule can lead to electrical shocks and or permanent damage of the equipment ...

Page 9: ...line level input The balanced line level input is implemented using a 3 pin terminal block connector Line level input signals balanced or unbalanced shall be connected to this terminal 3 Input selector switch This switch allows selection of the input signal between line level left position or loudspeaker level right position inputs 4 Balanced line level output The balanced and galvanic isolated ou...

Page 10: ... public address audio systems into a balanced line level audio signal Depending of the line voltage 100V 70V 50V or 33V the correct terminals of the loudspeaker input 5 pin terminal block connector shall be used The line level output available on the XLR connector can then be fed directly to any line level input on amplifiers or pre amplifiers Make sure the input selector switch is in 100V right p...

Page 11: ...on amplifiers or pre amplifiers Make sure the input selector switch is in 100V right position 3 Connection line level input signals The ATU44 can be used as a galvanic isolator between line level input signals allowing it for being used as an audio isolation solution solving hum and buzz problems caused by ground loops The line level input shall be applied to the 3 pin line level terminal block in...

Page 12: ... pin terminal block 5 08 mm pitch Impedance 600 Ohm Outputs Type Balanced line level audio output Connectors Male XLR Impedance 600 Ohm Dimensions W x H x D 108 x 44 x 165 mm Weight 0 45 Kg Packaging Carton box Shipping weight Volume 0 77 Kg 0 0078 Cbm Compatible devices WLI18 Wall line input unit WMI18 Wall microphone input unit Optional accessories MBS1xx Mounting brackets ...

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