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.

Introduction

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.

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.

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.

System Connection

Audio Output

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
IRSTEREO BRIDGE
MONO
L R
MIC
LINE48V
MIC 1 2
INPUTS
STEREO BRIDGE
MONO
Speaker

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
IRSTEREO BRIDGE
MONO
L R
MIC
LINE48V
MIC 1 2
INPUTS
Speaker
STEREO BRIDGE
MONO

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
IRSTEREO BRIDGE
MONO
L R
MIC
LINE48V
MIC 1 2
INPUTS
Speaker
STEREO BRIDGE
MONO

Microphone Input

The microphone input of PT-AA220 has three modes, and different modes use different connections, as the picture below:

RS232
Tx Rx
IRSTEREO BRIDGE
MONO
L R
MIC
LINE48V
MIC 1 2
INPUTS
MIC
MIC
LINE48V
Mode Switch

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.

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.

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:

System Diagram

System Operation

Panel Control

The buttons provide the control of volume/EQ control and switching. The following content introduces audio switching and EQ control in detail.

Audio Switching

There are two switchable stereo audio inputs, one 2xRCA input, and one 3.5mm jack input, switchable through the buttons as below: Source Selection

Volume/EQ Control

The line volume and MIC volume can be controlled by the buttons. The MIC Volume/LINE volume/LINE bass/LINE treble will be selected by the buttons, and controlled up/down/mute by the function buttons. Please check the picture below:

For example, to turn up the line volume, you should select the “LINE” first, and then press the button “▲”.

• Firstly to select the function from this menu.
• Then to turn down/up the level, or mute the output.

IR Remote Control

Note: The IR remote, the IR receiver, and the battery of the IR remote are all offered for charge.

IR receiver head, works in conjunction with the IR remote. Please point the IR remote at the IR receiver when use, to avoid getting out of control as there is no signal detected.

3.5mm jack, insert it into the specialized socket (3.5mm) to connect the IR receiver with the amplifier

• Mute Mode:
• MIC: Mute the microphone volume.
• LINE: Mute the line volume.
• SPEAKER: Unmute

Use to transmit the infrared signal send by the IR remote.

• Audio Controlling Modes
• MIC: turn up/down the microphone volume.
• LINE: turn up/down the line volume.
• BASS: bass tuning
• TREBLE: treble of line volume.

• Audio Inputs
• RCA dual-mono audio inputs
• 3.5mm jack

RS232 Command

Communication Protocol: RS232 Communication Protocol
Baud rate: 9600 Data bit: 8 Stop bit: 1 Parity bit: none

Note: The letter inside bracket [ ] is the variable code, which is changeable.
The bracket [ ] is not included to the RS232 commands.
Any dot “.” after the letters is part of the commands.

• Example 1: Switching the input 2 to the line out, RS232 command is: 2A1.
• Example 2: Turning up the volume of line audio, RS232 command is: 603%
• Example 3: Preset the MIC volume to “21” degree, RS232 command is: 521%
• Example 4: Checking the working status of PT-AA220, RS232 command is: 600%

Specification

Panel Drawing

87 mm
57 mm
12 mm
123 mm
99 mm
39.5 mm

Troubleshooting & Maintenance

1. When there is no output audio: Check if there is any signal at the input. Check if there is any signal at the output. We can check these by using an oscilloscope or a multimeter. If there is no signal input/output, maybe the input/output cables are broken or the connectors loosened, please change for another cable. Check if the output port number is the same with the controlled one. If not the problem mentioned above, probably there is something broken inside the unit, please send it to the dealer for repairing.
2. If the POWER indicator doesn’t work or no response to any operation, please make sure the power cord connection is good.
3. If the output sound is interfered, please make sure the system is grounded well.
4. If the static becomes stronger when connecting the audio connectors, it is probably due to bad grounding, please check the grounding and make sure it is connected well, otherwise it would damage the converter.
5. If the PT-AA220 amplifier cannot be controlled by the keys on the front panel, RS232 port or IR remote, the unit may have already been broken. Please send it to the dealer for repairing.

After-Sales Service

If there appear some problems when running the product, please check and deal with the problems referring to this user manual. Any transport costs are borne by the users during the warranty.

1. Product Limited Warranty: This product will be free from defects in materials and workmanship for two years (The purchase invoice shall prevail). Proof of purchase in the form of a bill of sale or receipted invoice which is evidence that the unit is within the Warranty period must be presented to obtain warranty service.
2. What the warranty does not cover (servicing available for a fee): Warranty expiration. Factory applied serial number has been altered or removed from the product. Damage, deterioration or malfunction caused by: Normal wear and tear. Use of supplies or parts not meeting our specifications. No certificate or invoice as the proof of warranty. The product model showed on the warranty card does not match with the model of the product for repairing or had been altered. Damage caused by force majeure. Servicing not authorized by distributor. Any other causes which does not relate to a product defect. Delivery, installation or labor charges for installation or setup of the product.
3. Technical Support: For any questions or problems, contact your distributor or reseller and tell them the respective product name and version, the detailed failure situation as well as the formation of the cases.

Asking for Assistance

Technical Support:
Phone: +49 5971 800299 - 0
Fax: +49 5971 800299 – 99
Technical Support Hours:
8:30 AM to 5:00 PM Monday thru Thursday
8:30 AM to 4:00 PM Friday
Write to:
PureLink GmbH
Von-Liebig-Straße 10
D - 48432 Rheine
www.purelink.de
info@purelink.de

Legal & Compliance

Product identification

Model: PT-AA220 – manual version 1.0

Trademarks and disclaimer

Product model and logo are trademarks. All other company and product names mentioned are trademarks of their respective owners. All rights reserved. No part of this publication may be copied or reproduced without prior written permission. We reserve the right to make changes to the device, packaging or manual and accept no liability for misprints.

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.

Disposal of electrical and electronic equipment

WEEE reg. no.: DE 93847290

The crossed-out wheelie bin symbol on the product, packaging or in this manual means that electrical and electronic equipment must not be disposed of with household waste at the end of its life. Hand in old devices free of charge at a public collection point or return them to a distributor obliged to take them back. Remove batteries and lamps that can be removed without destroying the device before handing it in, and delete any personal data stored on the device. Details are regulated by national law. By returning old devices you help protect the environment.

Packaging

Dispose of packaging separately by material (paper/cardboard, plastics) via the local collection systems. Keep packaging material away from children – risk of suffocation. Packaging register LUCID: DE5958616449295.