AUDAC ATU44 User Manual

ATU44

User Manual

www.audac.eu

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3

Index

Introduction 5

Precautions 6

Safety requirements 6

Caution servicing 6
EC Declaration of Conformity 6
Waste of Electrical and Electronic Equipment (WEEE) 7
Caution 7

Block diagram 9

Chapter 2: Front & rear panel 12
Front panel overview 12

Front panel description 12
Rear panel overview 13
Rear panel description 13

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5

Introduction

Line Transformer

The AUDAC ATU44 is a universal input adaptor which can be used for a wide varity of
connections and extensions.

One of it’s possibility’s is converting any loudspeaker signal into a balanced or unbalanced
line level signal. It has inputs for 100V, 70V, 50V, 33V and standard 8 Ohm low impedance
speaker signals.

It also offers the possibility to convert a unbalanced line signal into a balanced one, and
vice versa.

The switch on the front panel allows to select between converting a speakersignal into a
line signal, or the conversion of a unbalanced line signal into a balanced line signal.

The in- and outputs of the ATU44 are completely galvanic isolated by means of an audio
isolation transformer.
This makes the ATU44 the perfect solution for solving hum and buzz problems caused by
ground loops.

The inputs are fitted with screw clamp connectors, and the output is fitted with an male
XLR connector.

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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

CAUTION - SERVICING

This product contains no user serviceable parts. Refer all servicing to
qualified service personnel. Do not perform any servicing (unless you
are qualified to)

EC DECLARATION OF CONFORMITY

This product conforms to all the essential requirements and further
relevant specifications described in following directives: 2004/108/EC
(EMC) and 2006/95/EC (LVD)

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WASTE ELECTRICAL AND ELECTRONIC EQUIPMENT (WEEE)

The WEEE marking indicates that this product should not be disposed
with regular houshold waste at the end of its working life. 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
of this product at your local collection 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
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 qualified 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.

ADDITIONAL INFORMATION

This manual is put togheter with 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.

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Schematic

Instructions

The ATU44 can convert the low impedance (8 ohm) loudspeaker signal back to a balanced line
signal, but the terminals which should be connected depend of the power on the loudspeaker
line:

When the power is between 100 - 150 Watt you need to connect the loudspeaker line
between the COM and the 33V connection terminals.

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When the power is higher up to 300 Watt you need to connect the loudspeaker line
between the COM and the 50V connection terminals.

When the power is even higher up to 600 watt, you need to connect the loudspeaker line
between the COM and the 70V connection terminals.

To convert an unbalanced 100V line signal to a balanced line signal:
Turn the switch to ‘100V’ and connect the line signal between ‘COM’ and ‘100V’

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Technical specifications

Speaker Input level

100V
70V
50V
33V
8 Ohm

Connectors

Input: Euro terminal block screw mount
Output: Male XLR

Construction:
Aluminium

Color:

Black

Weight
Net. 330 g

Dimensions (W x H x D)

35 x 105 x 110 mm

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Notes