Manual

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 to PT-AA140

The PT-AA140 is a 40 Watt power amplifier (Class-D) with output alternatively at 70V or 100V. It has 2 stereo inputs (1x3.5mm jack for line in, 2xRCA for L&R), 1 digital input & 1 balanced MIC. It is integrated with powerful functions, including ducking function, EQ control, MIC mixer etc, and MIC input supports 3 levels with condenser MIC, dynamic MIC & line audio input.
As for power amplifier we have normally voltages at 70V and 100V for different countries, but PT-AA140 is designed to integrate with both voltages to meet different requirements.

Feature

• Mono audio output at 40Watt.
• Switchable between 70V and 100V.
• Ducking function.
• 16 ID codes for controlling between different PT-AA140 amplifiers.
• 3-level MIC input, supports condenser microphone, dynamic microphone and wireless microphone.
• MIC port can support balance/unbalance signal, suppress the external noise effectively.
• Two stereo audio inputs and one digital audio input, switchable by button, IR remote & RS232.
• Volume/Bass/Treble controllable by buttons, IR remote & RS232.
• Fast switching speed for good performance.
• Convection cooler, fan is not needed.
• LED indicator, for power and working status.

Package Content

• 1 x PT-AA140
• 2 x Mounting Ears with 4 Screws
• 4 x Plastic Cushions
• 2 x Pluggable Terminal Blocks
• 1 x Power Adapter (DC 24V 2.71A)
• 1 x User Manual

Note: Confirm if the product and the accessories are all included, if not, please contact with your dealers.

Front Panel

Rear Panel

Usage Precaution

• No working with empty load is allowed.
• Speakers must be connected before power on.

System Diagram

MIC

Audio Player
DVD
Laptop
IR
Receiver
RemoteControl Panel Speaker
Audio:
IR:
RS232:

Audio Signal Connection

Audio Output

The PT-AA140 supports mono audio output, and the output voltage is 70V or alterative 100V. With its dual-purpose design, it can be applied in different areas. The end COM is for grounding. The amplifier to be connected is mono audio output with a rated power at 40Watt, so PT-AA140 can be connected with several speakers in parallel connection way (Total power mustn’t be more than 40Watt).
The following figure shows us how to connect with the speakers. Here we take the 100V/10W speakers for each as example.

Note: Speakers to be connected should be with constant pressure.

COM 70V 100V
Speaker Speaker Speaker Speaker
(100V/10W)(100V/10W)(100V/10W)(100V/10W)

Audio Input

The PT-AA140 provides with 2 stereo audio inputs, one microphone input and one digital fiber audio input. The following figure shows the audio input ports.

• 48V phantom power input When the switch turns to “48V” (It has a good frequency characteristic, high input impedance and high sensitivity in this mode), 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” (It has a low frequency characteristics, and wide frequency response in this mode), the microphone input is used for connecting with dynamic microphone. There are two different connections: a) Unbalanced connection: “+” and “ ” connect to ground, and “-” connects to signal. “-” and “ ” connect to ground, and “+” connects to signal. b) Balanced connection: “+” connects to positive, “-” connects to negative and “ ” connects to ground. Dial Switch, to select the MIC input mode, includes MIC (dynamic microphone), 48V (condenser microphone) and LINE (normal audio or wireless microphone).

• LINE input When the switch turns to “LINE” (It has a low frequency characteristics, and wide frequency response in this mode), the microphone input is used for connecting with normal audio or wireless microphone output. There are two different connections: a) Unbalanced connection: “+” and “ ” connect to ground, and “-” connects to signal. “-” and “ ” connect to ground, and “+” connects to signal. b) Balanced connection: “+” connects to positive, “-” connects to negative and “ ” connects to ground.

Digital Audio Input
The PT-AA140 provides with a fiber optical port to connect with digital audio source device. With the SPF optical fiber, the audio signal can be transmitted faster, more stable, reliable, and can be transmitted over a long distance without distortion.

Caution: This digital audio input can support/decode PCM format signal only. If the CD/DVD is DTS or AC3 format, please set the player to PCM format output before connect to PT-AA140.

System Applications

The PT-AA140 can be applied in different occasions, such as classroom, small meeting room, lecture hall, bar and hotel etc.

Button Control

The buttons provide the control of volume/EQ control and switching. The LED indicator will show the connecting status. The following content introduces audio switching and EQ control in detail. Operations: Press the corresponding button again for cyclic switching.

Audio switching

There are three switchable audio inputs: one 2xRCA input, one 3.5mm jack input, and one digital fiber audio input, switchable through the buttons as below:

• 1: Dual mono audio
• 2: Stereo audio
• 3: Digital fiber audio.

Volume/EQ controlling

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 “△”.

Audio Mode Switching
Volume Adjustment:

• ▽: Turn down the volume
• △: Turn up the volume
• MUTE: Mute the output

IR Remote Control

The PT-AA140 provides with an IR eye, with the IR Receiver and the IR remote, user can control PT-AA140 remotely.

Note: The IR Receiver and the IR remote are all offered for charge.

• Mute Mode:
• MIC: Mute the microphone volume.
• LINE: Mute the line volume.
• SPEAKER: Unmute
• Use to transmit the infrared signal send by the remote controller.

• 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 Source Selection:
• 1: 2 RCA dual-mono audio input
• 2: 1 3.5mm jack
• 3: 1 Digital fiber audio input

IR receiver, works together 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 PT-AA140 socket (3.5mm), to connect the IR receiver with PT-AA140.

RS232 Control

Connection with Computer

When the amplifier connects to the COM1 or COM2 of the computer with control software, users can control it by that computer.
To control the amplifier, users should use a 3-pole male captive screw to 9-pin HD female connector and use the public COM software.

RS232 Control Software

• Installation
• Connect the input source devices and the output device according to the system diagram.
• Copy the RS232 control software to one computer, and then connect the RS232 port of this computer and PT-AA140.
• Double-click the EXE program to execute the software.

Here we take the software CommWatch.exe as example. The icon is showed as below:

• Uninstallation
• Delete all the control software files in corresponding file path.

PC

Running Environment

While the control software is installed, we can activate the software through the RS232 port and set the parameters, to make it able to send RS232 commands to control 4PT-AA140.

Function Setting

With the control software, we can easily switch the input channel, mute the output, check the working status, and adjust the volume etc. Please refer the details in RS232 Communication Commands.
The interface of the control software is showed as below:

Parameter Configuration area
Monitoring area, indicates if the command sent works.
Command Sending area

RS232 Command

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

Note: 1) The letter inside bracket [ ] is the variable code, which is changeable.
2) The bracket [ ] is not included to the RS232 commands.
3) Any dot “.” after the letters is part of the commands.
4) Ducking function:
When input with MIC, the volume of the line audio will be automatically turned down to the preset volume level, if there is no input MIC audio signal after 5 seconds, then the volume will be automatically turned up to the original one. If you need to disable/enable the ducking function, just send the command “610%” again.

5) ID coding
The ID codes of PT-AA140 ranges from 0 to F (hexadecimal), when sending RS232 commands, please take notice of the address of the ID code.
If the address of the ID code is 0, any RS232 command is available.
If the address is in 1~F, it has one unique ID code (If the ID code is not the same with the address, no RS232 command will work).
While the ID code is in 1~F, please add “ID/” before sending the command.
For example, if the ID code is 5, the RS232 command needed is “604%”, the correct command is in this format: 5/604%.
There is no need to add “ID/” before the command when the ID code is 0.

1) Switching the input 2 to the line out, the command is: 2A1. 2) Turning up the volume of line audio, the command is: 603% 3) Preset the MIC volume to “21” degree, the command is: 521% 4) Checking the working status of PT-AA140, the command is: 600% 5) If the ID code is 0, sending command 601% is able to turn up the MIC volume. If the ID code is 2, sending command 601% will not work, and the MIC volume remains unchanged. The right command is 2/601%.Examples

Audio Input

Audio Output

Audio General

Control Function

General

Panel Drawing

157 mm
130 mm
144 mm
44 mm 13 mm
108 mm

Troubleshooting and Maintenance

Note: If your problem persists after following the above troubleshooting steps, seek further help from authorized dealer or our technical support.

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):
3. 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.
4. 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