PureTools PT-AA220 User manual

User Manual
PT-AA220
User Manual
Audio Amplifier 2x20W Output, 4Ω, 2 Line & 1 MIC Inputs
Model PT-AA220
Designed in Germany
© 2017 PureLink GmbH All rights reserved. VersionV1.0

User Manual
PT-AA220
Preface
Read this user manual carefully before using this product. Pictures shown in this
manual are for reference only. Different model layouts and specifications are subject
to the physical product.
This manual is for operation instructions only, not for any maintenance usage.
In the constant effort to improve our product, we reserve the right to make changes in
functions or parameters without prior notice or obligation.
Trademarks
Product model and logo are trademarks. Any other trademarks mentioned in this
manual are acknowledged as the properties of the trademark owner. No part of this
publication may be copied or reproduced without the prior written consent.
FCC Statement
This equipment generates, uses and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause harmful
interference to radio communications. It has been tested and found to comply with
the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These
limits are designed to provide reasonable protection against harmful interference in
a commercial installation.
Operation of this equipment in a residential area is likely to cause interference, in
which case the user at their own expense will be required to take whatever measures
may be necessary to correct the interference.
Any changes or modifications not expressly approved by the manufacture would void
the user’s authority to operate the equipment.

User Manual
PT-AA220
REACH | 1907/2006/EU
ROHS | 2011/65/EU
PureLink hereby declares that this product PureTools PT-AA220 complies with
Directives 1907/2006/EU und 2011/65/EU.
EMC / LVD (Electro Magnetic Compatibility / Low Voltage Directive)
PureLink GmbH hereby declares that this product PureTools PT-AA220 complies with
Directives 2014/30/EU and 2014/35/EU. The full text of the EU Declaration of
Conformity is available at the following Internet address:
http://www.purelink.de/ce/4251364706633_CE.pdf

User Manual
PT-AA220
SAFETY PRECAUTIONS
To insure the best from the product, please read all instructions carefully before
using the device. Save this manual for further reference.
Unpack the equipment carefully and save the original box and packing material
for possible future shipment
Follow basic safety precautions to reduce the risk of fire, electrical shock and
injury to persons.
Do not dismantle the housing or modify the module. It may result in electrical
shock or burn.
Using supplies or parts not meeting the products’ specifications may cause
damage, deterioration or malfunction.
Refer all servicing to qualified service personnel.
To prevent fire or shock hazard, do not expose the unit to rain, moisture or install
this product near water.
Do not put any heavy items on the extension cable in case of extrusion.
Do not remove the housing of the device as opening or removing housing may
expose you to dangerous voltage or other hazards.
Install the device in a place with fine ventilation to avoid damage caused by
overheat.
Keep the module away from liquids.
Spillage into the housing may result in fire, electrical shock, or equipment damage.
If an object or liquid falls or spills on to the housing, unplug the module
immediately.
Do not twist or pull by force ends of the optical cable. It can cause malfunction.
Do not use liquid or aerosol cleaners to clean this unit. Always unplug the power
to the device before cleaning.
Unplug the power cord when left unused for a long period of time.
Information on disposal for scrapped devices: do not burn or mix with general
household waste, please treat them as normal electrical wastes.

User Manual
PT-AA220
Contents
1. Introduction..................................................................................................................................1
1.1. Introduction to PT-AA220..............................................................................................1
1.2. Feature ...............................................................................................................................1
1.3. Package List ......................................................................................................................2
2. System Connection.....................................................................................................................3
2.1. Audio Output ....................................................................................................................3
2.1.1. Default Output: 2x20Watt@4Ohm.................................................................3
2.1.2. Bridge Connection: 1x40Watt@8Ohm ..........................................................3
2.1.3. Dual-Mono Output...............................................................................................4
2.2. Microphone Input............................................................................................................4
2.2.1. 48V Phantom Power Input ................................................................................4
2.2.2. MIC Input................................................................................................................5
2.2.3. LINE Input ..............................................................................................................5
2.3. System Diagram...............................................................................................................6
3. System Operation........................................................................................................................7
3.1. Panel Control....................................................................................................................7
3.1.1. Audio Switching ...................................................................................................7
3.1.2. Volume/EQ Control .............................................................................................8
3.2. IR Remote Control ...........................................................................................................9
3.3. RS232 Command .......................................................................................................... 10
4. Specification.............................................................................................................................. 12
5. Panel Drawing........................................................................................................................... 13
6. Troubleshooting & Maintenance.......................................................................................... 14
7. After-Sales Service................................................................................................................... 15

User Manual
PT-AA220
1
1. Introduction
1.1. Introduction to PT-AA220
The PT-AA220 is a compact-size digital amplifier (Class-D) with 3 inputs (2 line in and
1 balanced MIC). It is integrated with powerful functions, including bridge connection,
dual-mono, EQ control, microphone mixer etc.
It has a good application in different places, including classroom, small meeting room,
lecture hall, bar, pub etc.
1.2. Feature
2x20Watt@4Ohm as the default amplifier output.
Bridge connection function. User can switch the PT-AA220 to be
1x40Watt@8Ohm by bridge connection.
Two stereo audio inputs, switchable by button, IR remote & RS232.
Volume/Bass/Treble controllable by buttons IR remote & RS232.
MIC port can support balance/unbalance signal, suppress the external noise
effectively.
Line audio output at 3.5mm jack, with volume controllable.
Dual-mono function. User can sum up the stereo audio to two times mono audio.
MIC mixer function. The microphone will be mixed to the line audio output, and be
controlled separately.
MIC input supports 48V phantom power, dynamic MIC and wireless MIC.
Auto noise gate. It keeps detecting the audio and MIC input, will mute the output
when there is no input.
Ultra low inrush current, no need for power sequencing. This allows multiple
PT-AA220 to be powered on simultaneously without overloading power circuits.
Convection cooler, fan is not needed.
Antistatic case design: providing good protection for long-term and stable
performance.

User Manual
PT-AA220
2
1.3. Package List
1 x PT-AA220 (The mounting ears and PT-AA220 are as a whole.)
2 x Pluggable Terminal Blocks
1 x Power Adapter
1 x Power Cord
4 x Plastic Cushions
1 x User Manual
Note:
The IR remote and its battery are offered for charge separately.
The IR receiver is also offered for charge.
Please confirm if the product and the accessories are all included, if not, please
contact with the dealers.

User Manual
PT-AA220
3
2. System Connection
2.1. Audio Output
2.1.1. Default Output: 2x20Watt@4Ohm
The default output of amplifier is 2x20Watt@4Ohm, so user can connect the
amplifier output in the regular way. As the picture below:
Speaker
OUTPUTS
LOOP
1x40Watt 8@ Ω
2x20Watt 4@ Ω
RS232
Tx Rx
IR
STEREO BRIDGE
MONO
LR
MIC
LINE
48V
MIC 1 2
INPUTS
STEREO BRIDGE
MONO
Speaker
2.1.2. Bridge Connection: 1x40Watt@8Ohm
The PT-AA220 has the bridge connection, to double the output power at
1x40Watt@8Ohm. It will sum up the input left channel and input right channel to be
mono output, and the power is up to 40Watt.
The bridge connection is:
OUTPUTS
LOOP
1x40Watt 8@ Ω
2x20Watt 4@ Ω
RS232
Tx Rx
IR
STEREO BRIDGE
MONO
LR
MIC
LINE
48V
MIC 1 2
INPUTS
Speaker
STEREO BRIDGE
MONO

User Manual
PT-AA220
4
2.1.3. Dual-Mono Output
The PT-AA220 also has the function of double-mono output. It can sum up the left
and right channel, to be the mono audio output. In this way, the both of the outputs
are showing the same mono audio.
The connection is:
Speaker
OUTPUTS
LOOP
1x40Watt 8@ Ω
2x20Watt 4@ Ω
RS232
Tx Rx
IR
STEREO BRIDGE
MONO
LR
MIC
LINE
48V
MIC 1 2
INPUTS
Speaker
STEREO BRIDGE
MONO
2.2. Microphone Input
The microphone input of PT-AA220 has three modes, and different modes use
different connections, as the picture below:
RS232
Tx Rx
IR
STEREO BRIDGE
MONO
LR
MIC
LINE
48V
MIC 1 2
INPUTS MIC
MIC
LINE
48V
Mode Switch
2.2.1. 48V Phantom Power Input
When the switch turns to “48V”, the MIC input will provide a 48V phantom power.
This is usually used for power supply for condenser microphone, Connection is:
“+” connects to positive, “-” connects to negative and “╧” to ground.
Note: In this mode, only condenser microphone can be connected with.

User Manual
PT-AA220
5
2.2.2. MIC Input
When the switch turns to “MIC”, the microphone input is used for connecting with
dynamic microphone. There are two different connections:
1) Unbalanced connection:
“╧” connects to ground, and “-” connects to signal.
“╧” connects to ground, and “+” connects to signal.
2) Balanced connection: “+” connects to positive, “-” connects to negative and “╧”
connects to ground.
2.2.3. LINE Input
When the switch turns to “LINE”, the microphone input is used for connecting with
normal audio or wireless microphone output. There are two different connections:
1) Unbalanced connection:
“╧” connects to ground, and “-” connects to signal.
“╧” connects to ground, and “+” connects to signal.
2) Balanced connection: “+” connects to positive, “-” connects to negative and “╧”
connects to ground.