AUDAC AMP22 User manual

User manual
AMP22
audac.eu

AMP22 - 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.

AMP22 - User manual 03
Table of contents
Introduction 05
Mini stereo power amplier � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 05
Precautions 06
Chapter 1 08
Connections and connectors � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 08
Chapter 2 010
Overview AMP22 � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 010
Chapter 3 012
AMP22 Quick start guide � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 012
Connecting the AMP22 � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 012
Conguring the AMP22 � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 013
Ready � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 013
Technical specications 014

AMP22 - User manual04

AMP22 - User manual 05
Introduction
Mini stereo power amplier
The AMP22 is a mini stereo power amplier with a power rating of 2 x 15 Watt, which lends itself perfectly to small speaker
systems requiring compact and economical audio solutions. It offers the ideal solution for applications such as classrooms,
ofces and meeting rooms where a small amount of speakers are required.
The compact size and very high efciency makes it perfectly suited to be hidden in a closet, on a false ceiling or mounted
under a desk or table.
The combination of the stereo balanced line and microphone input make it perfectly suited for applications where it should be
used in combination with projection screens and video sources while a microphone is connected. Two gain potentiometers
make it possible to control the sensitivity and balance between music and speech, while a switch allows bridging of the
output channels to obtain one channel with merged output power.
A remote wall panel can be connected for applications where local mixing of the inputs is desirable, while large distances can
be covered between the source and amplier using simple CAT5E twisted pair cabling. The volume controller input allows
connection of an additional wall controller for overall volume control.
The Class-D Amplier technology, standby mode and included switching power supply makes this device compliant to Energy
Star 3.0 and other strict energy efciency and environmental requirements.

AMP22 - User manual06
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
NO NAKED FLAME SOURCES, SUCH AS LIGHTED CANDLES, SHOULD BE PLACED ON THE APPARATUS
DO NOT PLACE THIS UNIT IN AN ENCLOSED ENVIRONMENT SUCH AS A BOOKSHELF OR CLOSET. ENSURE THERE IS ADEQUATE
VENTILATION TO COOL THE UNIT. DO NOT BLOCK THE VENTILATION OPENINGS.
DO NOT STICK ANY OBJECTS THROUGH THE VENTILATION OPENINGS.
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
THE MAINS PLUG OR APPLIANCE COUPLER IS USED AS THE DISCONNECT DEVICE, SO THE DISCONNECT DEVICE SHALL BE READILY
OPERABLE
USE THE APPARATUS ONLY IN MODERATE CLIMATES
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.

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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)
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) & 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 in an environmentally friendly
manner, and will help to protect the environment in which we all live.

AMP22 - User manual08
Chapter 1
Connections and connectors
CONNECTION STANDARDS
The in- and output connections for AUDAC audio equipment are performed according to international wiring
standards for professional audio equipment
3-Pin Terminal block:
Left:
Center:
Right:
For balanced signal input connections
For mic input connections For unbalanced signal input connections
Signal -
Signal +
Ground
+
RCA:
Unbalanced line audio input connections
PIN 1:
PIN 2:
PIN 3:
Ground
Signal +
Signal -
XLR
For balanced line or mic input connections
+
Tip:
Sleeve:
Signal
Ground

AMP22 - User manual 09
ATTENTION
The twisted pair cabling must always be ‘straight’. In case of self made cabling, it must be wired as described
above, to make the system work properly.
Volume controller RJ45:
For connection to wall mounted volume controllers (overall or master volume control)
Pin 1 White-Orange N/C
Pin 2 Orange N/C
Pin 3 White-Green - 8 V DC
Pin 4 Blue 0 ~ - 8V Variable in
Pin 5 White-Blue GND
Pin 6 Green GND
Pin 7 White-Brown N/C
Pin 8 Brown N/C
Remote wall panel RJ45 (Audio, +24V DC)
For connection to wall input panels
Pin 1 White-Orange Audio left +
Pin 2 Orange Audio left -
Pin 3 White-Green +24V DC
Pin 4 Blue N/C
Pin 5 White-Blue N/C
Pin 6 Green GND
Pin 7 White-Brown Audio right +
Pin 8 Brown Audio right -

AMP22 - User manual010
Front panel
Chapter 2
Overview AMP22
The front panel of the AMP22 contains all the control and indicator functions.
Two gain control potentiometers are provided with which the gain of the line and microphone inputs can be
regulated separately and the balance between the music and speech can be set.
A slide switch provides the possibility to switch the amplier between Stereo and Mono / Bridge mode. If this
switch is set to stereo, the output will be stereo. If its set to Mono / Bridge, the Left and Right channels will
be summed to a dual-mono output.
Three indication LED’s for ‘ON / STANDBY’, ‘SIGNAL’ and ‘CLIP’ indicate the operation mode of the amplier.
The ‘ON / STANDBY’ LED will turn green when the device is switched ON and running. When no signal with
a sufciently high level is detected for a certain period of time, it will switch to standby mode and this LED will
turn orange. The ‘SIGNAL’ LED will turn green when a signal with a sufciently high level is detected and the
‘CLIP’ LED will start blinking when the signal reached the clipping level and the internal limiter starts working.

AMP22 - User manual 011
All necessary connections of the AMP22 are provided at the
backside of the device. An overview and explanation of all
the connectors and possibilities is given below.
Rear panel
1) 24 Volts power connector:
The 24 Volts power supply connection is provided on the
left side of the AMP22’s rear panel. The included power
supply (PSD241) should be connected to the terminal block
connectors. Pay attention to the polarity when connecting
the power supply.
2) Loudspeaker output:
The loudspeakers should be connected to the 4-pins ‘AMP
OUT’ Terminal Block connector. Depending on the position
of the Stereo and Mono / Bridge switch on the front panel,
the corresponding audio output will be available here.
When used in Stereo mode, the left loudspeaker(s) should
be connected to the two leftmost terminals and the right
loudspeaker(s) should be connected to the two rightmost
terminals. When used in Bridge mode, the loudspeaker(s)
should be connected to the two outer terminals.
3) Remote wall panel and volume controller
connections:
Two RJ45 connectors are provided for connecting Remote
wall panels and external overall volume controllers. The
connections on these extension ports should be made
by using a simple CAT5E twisted pair (or better) cable in a
straight pinout conguration. The pinout and colour coding
is described on Chapter 1 of this instruction manual.
4) Balanced stereo line and microphone inputs:
The balanced stereo line and microphone input are performed
using 3-pins terminal block connectors.
All different kinds of balanced and unbalanced line level audio
sources can be connected to the line inputs. Some examples
are phones, tablets, laptops ...
The microphone input provides the possibility of connecting
any kind of microphone without phantom power requirement.
The remote wall panel connection carries the supply voltage
to the wall input unit and a stereo differential audio signal from
the wall input unit to the amplier.
The audio signal coming from the remote wall panel will be
proportionally mixed with the direct line and microphone
inputs.
The volume controller connection carries a negative supply
voltage to the external volume controller and has an input for
a variable negative voltage. Depending on this voltage, the
overall volume will be regulated. When no external volume
controller is connected, the overall volume of the device will
be defaulted to its maximum.

AMP22 - User manual012
Chapter 3
AMP22 Quick start guide
Connecting the AMP22
This chapter guides you through the setup process for a basic AMP22 project where to a line level audio
source and a microphone are connected directly. An external volume controller and remote wall panel are
installed remotely.
1) Connecting audio inputs
Connect all your audio sources to the audio inputs of the AMP22. All the direct audio inputs are performed
using 3-pins terminal block connectors. For more information about the connections and wiring pinout,
check Chapter 1 of this manual.
2) Connecting audio outputs
This suggested application uses a total of four loudspeakers. The AMP22 contains two speaker outputs
(stereo) meaning that two speakers should be connected on every amplied output. The speakers must be
connected in parallel and the load on each amplier output channel should be 4 Ohm or higher.
Overview of the AMP22 setup

AMP22 - User manual 013
Ready
Conguring the AMP22
VEXOxxA - User manual 013
3) Connecting the external units
The external (optional) wall volume controllers and remote wall panels should be connected to the
corresponding RJ45 connector ports. The connections should be made by using simple CAT5E twisted
pair (or better) cabling in a straight pinout conguration. The maximum cable length between the external
units and the AMP22 may not exceed a total cable length of 100 meters.
4) Connecting the power supply
The included power supply should be connected to the 2-pins Euro Terminal block connector. Watch the
polarity when connecting the power supply.
1) Adjusting the input sensitivity & volume
The conguration of the AMP22 only includes the sensitivity adjustment of the inputs and the overall volume
regulation. The sensitivity of the inputs can be regulated by the two potentiometers on the front panel of the
AMP22. The correct regulation depends on the signal level of the connected sources and the requirements
for each specic application. The regulation should be done experimentally, making a good balance between
the music signal from the audio source and the speech from the microphone.
The line and microphone level signal coming from the remote wall panel is mixed locally and the balance
can be set using both potentiometers. The output level can be set using the big volume dial. This signal is
mixed with the direct line and microphone inputs at equal levels.
After all sensitivity settings have been made, the overall volume control can be done using the VC3208
volume controller.
Your system is now ready for use.

AMP22 - User manual014
Technical specications
Inputs Type 1 x stereo Balanced Line
Connectors 2 x 3-pin terminal block ~ 3.81 mm
Impedance 20 kOhm
Sensitivity - 12 dBV ~ + 10dBv
Type 1 x balanced microphone
Connectors 3-pin terminal block ~ 3.81 mm
Impedance 47 kOhm
Sensitivity -50 dBV ~ -18 dBV
Outputs Type 1 x stereo loudspeaker output
Connectors 4-pin terminal block ~ 5.08 mm
Impedance Min load of 4 Ohm
RMS power 2 x 7.5 Watt @ 8 Ohm Stereo
2 x 15 Watt @ 4 Ohm Stereo
1 x 30 Watt @ 8 Ohm Bridge
THD+N < 0.1%
Crosstalk - 75 dB
Signal / Noise ratio > 95 dB
Power consumption Standby 0.8 Watt
Energy certication Energy Star 3.0
Efciency 1/8 MUP 70%
MUP 87%
Cooling Convection cooled
Protection Over heating
Over load
DC short circuit
Signal limiter
Auto power down Minimum signal -46 dB
Timing Max 90 Seconds
Power supply 24V DC
Dimensions (WxHxD) 108 x 44 x 164 mm
Weight 0.40 Kg
Included accessories PSD421 Power supply 24V / 1.67 A
Optional accessories VC3208 Remote volume controller
MBS1xx Mounting bracket series
CLA832 RCA / Cinch to terminal block cable
CLA835 XLR female to terminal block cable
TR3030 100V line transformer 30 Watt
WP2xx Universal wall panel series
PSD241 switching power supply included
NOTE: ‘MUP’ stands for Maximum Undistorted Power 100 ~ 240V AC / 47~63 Hz

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PSD241 switching power supply included
Notes

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