Woxcon PA250 User manual

PA250
Mini Audio Amplifier
All Rights Reserved
Version: PA250_2018V1.2
User Manual

Mini Audio Amplifier
Preface
Read this user manual carefully before using this product. Pictures shown in this
manual is for reference only, different model and specifications are subject to real
product.
This manual is only for operation instruction only, not for any maintenance usage. Any
changes of functions and parameters since then will be informed separately. Please
refer to the dealers for the latest details.
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 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.

Mini Audio Amplifier
SAFETY PRECAUTIONS
To i n s u r e t h e best from the product , p l e a s e read all instr u c t i o n s carefully before u s i n g
the device. Save this manual for further reference.
l Unpack the equipment carefully and save the original box and packing material for
possible future shipment
l Follow basic safety precautions to reduce the risk of fire, electrical shock and injury
to persons.
l Do not dismantle the housing or modify the module. It may result in electrical shock
or burn.
l Using supplies or parts not meeting the products’ specifications may cause
damage, deterioration or malfunction.
l Refer all servicing to qualified service personnel.
l To prevent f i r e o r shock hazard, do not e x p o s e t h e un it to rain, m o i s t u r e or install
this product near water.
l Do not put any heavy items on the extension cable in case of extrusion.
l Do not remove the housing of the device as opening or removing housing may
expose you to dangerous voltage or other hazards.
l Install the device in a place with fine ventilation to avoid damage caused by
overheat.
l Keep the module away from liquids.
l 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.
l Do not twist or pull by force ends of the optical cable. It can cause malfunction.
l Do not use liquid or aerosol cleaners to clean this unit. Always unplug the power to
the device before cleaning.
l Unplug the power cord when left unused for a long period of time.
l Information on disposal for scrapped devices: do not burn or mix with general
household waste, please treat them as normal electrical wastes.

Mini Audio Amplifier
Contents
1. Introduction .................................................................................................................. 1
1.1 Introduction to Mini Audio Amplifier .................................................................... 1
1.2 Features ............................................................................................................. 1
1.3 Package List ....................................................................................................... 1
2. Panel Description ........................................................................................................ 2
2.1 Front Panel ......................................................................................................... 2
2.2 Rear Panel ......................................................................................................... 4
3. System Connection ..................................................................................................... 5
3.1 Usage Precautions ............................................................................................. 5
3.2 System Diagram ................................................................................................. 5
3.3 Connection Procedure ........................................................................................ 5
3.4 Audio Output Connection ................................................................................... 6
3.4.1 Stereo output (default): 2x50Watt@8Ohm ............................................... 6
3.4.2 Mono output: 1x100Watt@4Ohm ............................................................. 6
3.5 Loop Connection ................................................................................................ 7
3.6 Application .......................................................................................................... 7
4. System Control ............................................................................................................ 8
4.1 Front Panel Button Control ................................................................................. 8
4.2 IR Control ......................................................................................................... 10
4.3 RS232 Control .................................................................................................. 11
4.3.1 Installation/uninstallation of RS232 Control Software ............................ 11
4.3.2 Basic Settings ........................................................................................ 11
4.3.3 RS232 Communication Commands ....................................................... 13
4.4 TCP/IP Control ................................................................................................. 14
4.4.1 Control Modes ........................................................................................ 14
4.4.2 Control via TCP/IP communication software .......................................... 15
4.4.3 Control via web-based GUI .................................................................... 16
4.4.4 Port Management ................................................................................... 18
5. Specification .............................................................................................................. 20

Mini Audio Amplifier
6. Panel Drawing ........................................................................................................... 21
7. Troubleshooting & Maintenance ................................................................................ 22
8. After-sales Service ..................................................................................................... 23

Mini Audio Amplifier
1
1. Introduction
1.1 Introduction to Mini Audio Amplifier
Mini Audio Amplifier is a compact-size digital amplifier (Class-D) with 3 inputs (1 L+R
stereo audio, 1 analog audio, 1 optical fiber audio). It features switchable stereo or
mono output, and boasts complete EQ adjustment and intuitive work status display,
making it an ideal addition to a classroom or conference room application.
1.2 Features
l 3 audio inputs: 1 L+R stereo, 1 analog, 1 optical fiber
l Switchable stereo / mono output
l Complete EQ management: including LINE, BASS, TREBLE
l Easy volume adjustment via a rotary knob
l Audio loop output
l Intuitive LED indicators for input source, control and volume setting
l Controllable via RS232, IR, TCP/IP (optional)
l Web-based GUI
l Power off memory
1.3 Package List
ü 1 x Mini Audio Amplifier
ü 2 x Detachable Mounting Ears with 4
Screws
ü 4 x Plastic cushions
ü 1 x Power Adapter (DC 36V 2.66A)
ü 1 x IR Remote
ü 1 x IR Receiver (5V, without carrier)
ü 1 x 3-pin Pluggable Terminal
Blocks
ü 1 x 4-pin Pluggable Terminal Blocks
ü 1 x User manual
&
Please confirm if the product and the accessories are all included, if not, please
contact with the dealers.

Mini Audio Amplifier
2
2. Panel Description
2.1 Front Panel
Figure 2- 1 Front Panel of Mini Audio Amplifier
No.
Name
Description
①
Power LED
Illuminate red when powered on
②
Input
Selection
Press to select any one of the 3 inputs, indicators will light
accordingly
Input 1~3 corresponds to audio sources connected to the 3
audio input ports separately;
Ø 1: L+R stereo audio
Ø 2: 3.5mm analog audio
Ø 3: optical audio
③
Control
Press to select the audio to be controlled, including LINE,
BASS, TREBLE
④
Volume Knob
l Press to mute/unmute the audio
Note: after pressed the button to mute the audio, except
pressing it again to restore the audio at the same volume,
users can rotate the knob to enable audio output at
respective volume.
l Rotate the knob to adjust volume, volume bars will
change accordingly
Ø Clockwise Rotation: Volume up
Ø Anticlockwise Rotation: Volume down
⑤
Volume Bars
Indicate real-time volume setting, 10 bars in total, no volume
bar will be lighted when the audio is muted
CONTROLINPUT SEL
1
2
3
LINE
BASS
VOLUME

Mini Audio Amplifier
3
Operation Format: “INPUT SEL” + “CONTROL” + “Volume Knob”.
Example: To adjust bass audio of input 3, select input 3 -> choose bass -> adjust the
volume knob.

Mini Audio Amplifier
4
2.2 Rear Panel
Figure 2- 2 Rear Panel of Mini Audio Amplifier
No.
Name
Description
①
CONTROL
TCP/IP: (optional) connect with control device to enable IP
control via web-based GUI& TCP/IP communication
software;
Indicators will blink when connected to control device
and communicated normally
RS232: connect with control device to enable serial control
IR IN: connect with IR receiver to collect infrade signal
Channel Switcher: dial to STEREO or MONO to enable
corresponding output mode
②
INPUTS
Audio inputs area, 3 audio inputs in total, including 1 stereo
audio, 1 analog audio and 1 optical audio
③
OUTPUTS
LOOP: analog audio loop output port, available only when
input signal is L+R stereo audio
Audio Output: including stereo audio (2x50W@8 Ω), or
mono output (1x100W@4Ω)
④
DC 36V
Insert DC 36V 2.66A power adapter here
⑤
GND
Connect to grounding
&
Dial the Channel Switcher to demand status before connecting output device.
Once connected, do not try to change the status while it’s working.
LOOP
3
1
DC 36V
IR INRS232
Tx Rx
AUDIO OPTICALL R
2
TCP/IP
2x50W 8@Ω
1x100W 4 @
STEREO
MONO

Mini Audio Amplifier
5
3. System Connection
3.1 Usage Precautions
1) System should be installed in a clean environment and has a prop temperature and
humidity.
2) All of the power switches, plugs, sockets and power cords should be insulated and
safety.
3) All devices should be connected before power on.
4) Use straight-thru Cat5e/Cat6 with TIA/EIA T568B terminations to connect TCP/IP
port.
3.2 System Diagram
Figure 3- 1 System Diagram
3.3 Connection Procedure
Step1. Connect audio sources (such as Blue-ray DVD) to INPUT ports of the device
with audio cables;
Step2. Dial the Channel Switcher to the right status, and connect audio output devices
(such as speakers) to audio output port accordingly (Specified in 3.4 Audio
Output Connection).
Step3. (optional) Insert an IR receiver (5V, without carrier) to IR IN to enable IR control.
Step4. (optional) Connect a control device (e.g. a PC) to RS232 port to enable serial
Laptop
Speaker
Audio Amplifier
IR Remote
IR Receiver
Audio Amplifier
IR Signal:
AUDIO Signal:
Control Signal:
DVD

Mini Audio Amplifier
6
control.
Step5. (optional) Connect a control device (e.g. a PC) to TCP/IP port to enable IP
control.
Step6. Plug DC 36V power adaptor to the power port of Mini Audio Amplifier.
3.4 Audio Output Connection
3.4.1 Stereo output (default): 2x50Watt@8Ohm
Dial the switcher to STEREO to enable 2 50Watt@8Ohm stereo output mode. Connect
the amplifier regularly (as shown in the following figure):
Figure 3- 2 Stereo Output Connection
3.4.2 Mono output: 1x100Watt@4Ohm
To enabl e mono 1x100Watt@4Ohm output, dial the switcher to MONO, and connect
output devices as the figure below:
Figure 3- 3 Mono Output Connection
LOOP
3
1
DC 36V
IR INRS232
Tx Rx
AUDIO OPTICALL R
2
TCP/IP
2x50W 8@Ω
1x1 00 W 4 @
STEREO
MONO
Speaker
Speaker
Switch to "STEREO"
STEREO
MONO
LOOP
3
1
DC 36V
IR I NRS232
Tx Rx
AUDIO OPTICALL R
2
TCP/IP
2x50W 8@Ω
1x100W 4 @
STEREO
MONO
Speaker
STEREO
MONO
Switch to " MONO"

Mini Audio Amplifier
7
3.5 Loop Connection
Mini Audio Amplifier boasts a LOOP port for audio signal loop output, max 255 units
can be looped within the same operation system. Connect Mini Audio Amplifier like this:
Figure 3- 4 Loop Connection
Then audio signal sent to the first Mini Audio Amplifier is cascaded to other connected
Mini Audio Amplifier, which enables multiple Mini Audio Amplifier share the same audio
source.
&
1. Audio loop output is available only when the 1st Mini Audio Amplifier select input 1/2
as source.
2. Audio control operations are not available to looped audio signal.
3.6 Application
Mini Audio Amplifier has a good application in various occasions, such as computer
realm, monitoring, big screen displaying, meeting room, education and bank &
securities institution etc.
Laptop
Speaker
Audio Amplifier
Speaker
Speaker
Audio Amplifier

Mini Audio Amplifier
8
4. System Control
4.1 Front Panel Button Control
Front panel buttons provides direct audio control including input source selection and
audio effect adjustment.
Figure 4- 1 Front Panel Buttons
Operation Format: Input Sel + Control + Volume Knob (indicators and volume bar will
display real-time operation)
Ø Input selection (area
①
):
Press button INPUT SEL to switch among the 3 inputs cyclely, relative LED will
light to indicate real-time selection. There are 3 selectable audio sources,
corresponding to the 3 audio input ports on the rear panel separately.
1: L+R stereo audio
2: 3.5mm analog audio
3: optical audio
Ø Control (EQ management) (area
②
):
Including LINE, BASS and TREBLE, press button Control to switch among the 3
inputs circularly, relative LED will light to indicate real-time selection.
Ø Volume Knob (area
③
):
Clockwise Rotation: Volume up
Anticlockwise Rotation: Volume down
CONTROLIN P U T SEL
1
2
3
LINE
BASS
VOLUME

Mini Audio Amplifier
9
About the Volume Bar (area
④
):
Volume bar indicates real-time volume setting, 10 bars in total, the higher the volume
is, the more bars will be illuminated. In different EQ control, volume bar tend to act
differently:
l LINE: Line volume can be 0~60, one more volume bar will light when the volume
is turned up by 6.
l BASS: bass volume can be 0~10
l TREBLE: treble volume can be 0~10

Mini Audio Amplifier
10
4.2 IR Control
Connect an IR receiver (5V, without carrier) to IR IN port on the rear panel, users are
able to control the amplifier by the included IR remote (see as below):
Figure 4- 2 IR Remote
Input Selection
Unmute
Mute
Volume Control
Including LINE, BASS
and TREBLE volume
adjustment

Mini Audio Amplifier
11
4.3 RS232 Control
Mini Audio Amplifier boasts a 3-pin pluggable terminal block for serial control. The
definition of its pins is listed in the table below.
No.
Pin
Function
1
N/u
Unused
2
Tx
Transmit
3
Rx
Receive
4
N/u
Unused
5
Gnd
Ground
6
N/u
Unused
7
N/u
Unused
8
N/u
Unused
9
N/u
Unused
Connect Mini Audio Amplifier to the control device (e.g. a PC) with RS232 cable and set
the parameters in the right manner, the control device is capable to control Mini Audio
Amplifier via designed software.
4.3.1 Installation/uninstallation of RS232 Control Software
Installation: Copy the control software file to the computer connected with Mini
Audio Amplifier.
Uninstallation: Delete all the control software files in corresponding file path.
4.3.2 Basic Settings
Firstly, connect Mini Audio Amplifier with an input device and an output device. Then,
connect it with a computer which is installed with RS232 control software. Double-click
the software icon to run this software.
Here we take the software CommWatch.exe as example. The icon is showed as
below:
The interface of the control software is showed as below:

Mini Audio Amplifier
12
Please set the parameters of COM number, bound rate, data bit, stop bit and the parity
bit correctly, only then will you be able to send command in Command Sending Area.
Parameter Configuration area
Monitoring area, indicates
whether the command
sent works.
Command Sending area
Parameter Configuration area
Monitoring area, indicates
whether the command
sent works.
Command Sending area

Mini Audio Amplifier
13
4.3.3 RS232 Communication Commands
&
1) Case-sensitive.
2) “[“, “]” in the commands are only for easy recognition and not necessary in real
operations. Other symbols including “.” “%” are parts of the commands.
3) Feedbacks listed in the column “Feedback” are only for reference, feedbacks may
vary according to different operations.
Communication protocol: Baud rate: 9600; Data bit: 8; Stop bit: 1; Parity bit: none.
Command
Description
Feedback
1A1.
Switch to input 1
A: 1 -> 1
2A1.
Switch to input 2
A: 2 -> 1
3A1.
Switch to input 3
A: 3 -> 1
0A0.
Mute Audio Line out
Mute Audio
0A1.
Unmute Audio Line out
Unmute Audio
600%
Inquire present working status
A: 1 -> 1
Volume: 30
Bass: 0
Treble: 0
601%
Turn up Line volume by 1
Volume of LINE: 51
602%
Turn down Line volume by 1
Volume of LINE: 51
603%
Turn up Bass volume by 1
Bass of LINE: 4
604%
Turn down Bass volume by 1
Bass of LINE: 4
605%
Turn up Treble volume by 1
Treble of LINE: 4
606%
Turn down Treble volume by 1
Treble of LINE: 4
607%
Restore factory default
Factory Default
A: 1 -> 1
Volume: 45
Bass: 5
Treble: 5
610%
Turn up Line volume by 3
Volume of LINE: 54
620%
Turn down Line volume by 3
Volume of LINE: 51
61X%
Turn up Line volume by X
Volume of LINE: 54
62X%
Turn down Line volume by X
Volume of LINE: 54
7[x][x]%
Preset line volume, [xx] can be 00~60, 61
degrees in total.
Volume of LINE: 50
8[x][x]%
Preset the bass level, [xx] can be 00~10, 11
Bass of LINE: 7

Mini Audio Amplifier
14
4.4 TCP/IP Control
Mini Audio Amplifier boasts option TCP/IP port for IP control.
Default settings: IP: 192.168.0.178; Subnet Mast: 255.255.255.0; Gateway:
192.168.0.1; Serial Port: 4001.
IP& gateway can be changed as you need, Serial Port cannot be changed.
Connect the ethernet port of control device and TCP/IP port of Mini Audio Amplifier, and
set same network segment for the 2 devices, users are able to control the device via
web-based GUI or designed TCP/IP communication software.
4.4.1 Control Modes
Mini Audio Amplifier can be controlled by PC without Ethernet access or PC(s) within a
LAN.
l Controlled by PC without Ethernet access
Connect a computer to the TCP/IP port of the Mini Audio Amplifier, and set its network
segment to the same as the Mini Audio Amplifier’s.
l Controlled by PC(s) in LAN
degrees in total.
9[x][x]%
Preset the treble level, [xx] can be 00~10,
11 degrees in total.
Treble of LINE: 7
GetIP;
Get the IP of the device
IP: 192.168.0.178
Same network
segment as the
switcher

Mini Audio Amplifier
15
Connect Mini Audio Amplifier, a router and several PCs to setup a LAN (as shown in
the following figure). Set the network segment of Mini Audio Amplifier to the same as
the router’s, then PCs within the LAN are able to control Mini Audio Amplifier.
Follow these steps to connect the devices:
Step1. Connect the TCP/IP port of the Mini Audio Amplifier to Ethernet port of PC with
straight-thru CAT5e/6.
Step2. Set the PC’s network segment to the same as the Mini Audio Amplifier’s.
Step3. Set the Mini Audio Amplifier’s network segment to the same as the router.
Step4. Set the PC’s network segment to the original ones.
Step5. Connect the Mini Audio Amplifier and PC(s) to the router. PC(s) within the LAN
is able to control the Mini Audio Amplifier asynchronously.
4.4.2 Control via TCP/IP communication software
(Exampled by TCPUDP software)
1) Connect a computer and Mini Audio Amplifier to the same network. Open the
TCPUDP software (or any other TCP/IP communication software) and create a
connection, enter the IP address and port of Mini Audio Amplifier (default IP:
192.168.0.178, port:4001):