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User Manual
TL-A80-20W
Mini Digital Amplifier
All Rights Reserved
Versi on: TL-A80-20W _160627
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TL-A80-20W User Manual
www.tlnetworx.com
Preface
Read this user manual carefully before using this product. Pictures shown in this manual
are for reference only, different model and specifications can be subject on real product.
This manual is only for operation instruction only, not for any maintenance use.
Trademarks
Product model and its 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 our 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.
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SAFETY PRECAUTIONS
To i ns u re t he b e st f ro m t h e p r od u c t , p l ea s e r e ad a l l i n st r u ct i o n s c a re f u l l y b e f or e 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 p re v e n t f i re o r s h o c k h azard, do not expose the unit to rain, moisture 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.
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TL-A80-20W User Manual
Table of Contents
1.! Introduction ............................................................................................ 1!
1.1.!Introduction to TL-A80-20W .......................................................... 1!
1.2.!Features .......................................................................................... 1!
1.3.!Package List .................................................................................... 1!
2.! System Connection Introduction ............................................................. 2!
2.1.!Audio Output .................................................................................. 2!
2.1.1.! Default output: 2x20Watt@4Ohm ...................................... 2!
2.1.2.! Bridge connection: 1x40Watt@8Ohm ................................. 2!
2.1.3.! Dual-mono Output .............................................................. 3!
2.2.!Microphone input ........................................................................... 4!
2.2.1.! 48V phantom power input ................................................... 4!
2.2.2.! MIC input ............................................................................ 4!
2.2.3.! LINE input ........................................................................... 4!
3.! Operation of the Control Panel and the IR Remote ................................. 5!
3.1.!Operation of the Control Panel ....................................................... 5!
3.1.1.! Audio switching ................................................................... 5!
3.1.2.! Volume/EQ control ............................................................. 5!
3.2.!Use of the IR Remote ...................................................................... 6!
4.! System Diagram ...................................................................................... 7!
5.! Communication Protocol and Command Codes ...................................... 8!
6.! Specification ............................................................................................ 9!
Panel Drawings ........................................................................................... 11!
7.! Troubleshooting & Maintenance ........................................................... 12!
8.! After-sales Service ................................................................................ 13!
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1. Introduction
1.1. Introduction to TL-A80-20W
The TL-A80-20W is a compact-size digital amplifier (Class-D) with 3 inputs (2 line in and
1 balanced MIC). It includes powerful functions, including output bridging, dual-mono
inputs, EQ control, microphone mixer etc.
1.2. Features
l 2x20Watt@4Ohm as the default amplifier output.
l Bridge output function. User can switch the TL-A80-20W to be 1x40Watt@8Ohm
by bridging.
l Two s te reo a ud io i np ut s, sw it ch ab le b y b ut to ns, IR remote & RS232.
l Volum e/Ba ss/Treble control lable by buttons, IR remote & RS232.
l MIC input can support balanced/unbalanced signals.
l Variab le line audio output on 3.5mm jack.
l Dual-mono summing. Stereo inputs can be summed to dual mono audio.
l MIC mixer function. The microphone will be mixed to the line audio output, and be
controlled separately.
l MIC input supports condenser mic (48V phantom power), dynamic MIC and wireless
MIC.
l Auto noise gate. It detects the audio of the MIC input, and will mute the channel
when there is no input.
l Ultra-low inrush current, no need for power sequencing. This allows multiple TL-
A80-20W amps to be powered on simultaneously without overloading power
circuits.
l Convection cooling, no fan needed.
l Antistatic case design: provides good protection for long-term and stable
performance.
1.3. Package List
Ø 1 x TL-A80-20W (mounting ears permanently affixed).
Ø 2 x Pluggable Terminal Blocks
Ø 1 x RS232 Cable
Ø 1 x Power Adapter
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Ø 1 x Power Cord
Ø 4 x Plastic Cushions
Ø 1 x User Manual
Notes
Ø The IR receiver, IR remote, and its battery are offered as an optional accessory (TL-
A8O-20W-IR)
Ø Please confirm if the product and the accessories are all included, if not, please
contact the reseller.
2. System Connection Introduction
2.1. Audio Output
2.1.1. Default output: 2x20Watt@4Ohm
The default output of amplifier is 2x20Watt@4Ohm, connect the amplifier output as
shown in the picture below:
2.1.2. Bridge connection: 1x40Watt@8Ohm
The TL-A80-20W has output bridging, to double the output power to
1x40Watt@8Ohm. It will sum the input left channel and input right channel to mono
output, and the power is up to 40Watt.
The bridging connections are:
Connect the four pins
to stereo speakers
Change the switch
to ‘STEREO”
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2.1.3. Dual-mono Output
TL-A80-20W 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:
Change the switch
to ‘BRIDGE”
Connect the two pins
to a single speaker
Change the switch
to ‘MONO’
Connect the four pins
to two speakers
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2.2. Microphone input
The microphone input of TL-A80-20W has three modes, and each different mode
requires a different connection:
2.2.1. 48V phantom power input
When the switch is moved to “48V”, the MIC input will provide 48V phantom power.
This is used to supply power to a condenser microphone. Connection is:
“+” connect to positive, “-” connect to negative and “” to ground.
Note: In this mode, only condenser microphone can be connected.
2.2.2. MIC input
When the switch is moved to “MIC”, the microphone input is used for connecting to a
dynamic microphone. There are two different connections:
1) Unbalanced connection:
“” 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 is moved to “LINE”, the microphone input is used to connect to a
standard ‘line’ audio or wireless microphone output. There are two different
connections:
1) Unbalanced connection:
“” connects to ground, and “+” connects to signal.
2) Balanced connection: “+” connects to positive, “-” connects to negative and “”
connects to ground.
Mic mode Switch
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3. Operation of the Control Panel and the IR Remote
3.1. Operation of the Control Panel
The buttons provide control of volume, EQ control, and switching.
3.1.1. Audio switching
There are two switchable stereo audio inputs, one 2xRCA input, and one 3.5mm jack
input, switchable via buttons as below:
3.1.2. Volum e/ EQ c ontro l
The line volume and MIC volume can be controlled by the buttons.
The MIC Volume/LINE volume/LINE bass/LINE treble are selected by the ‘select’ button,
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 “ ”.
S
ource
Selection
Select the
function first
from this
menu.
Tu rn down/up
the level, or
mute the
output using
these buttons.
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3.2. Use of the IR Remote
Notice: The IR remote, the IR receiver, and the battery of the IR remote are all offered as
an accessory (TL-A8O-20W-IR).
IR receive r, works in
conjunction with the IR
remote. Point the IR remote at
the IR receiver to control the
amp.
3.5mm jack, insert
into the special ‘IR’
socket (3.5mm) on
the amplifier.
Mute Mode:
MIC: Mute the
microphone.
LINE: Mute the line.
SPEAKER: Mutes all
inputs (MIC and LINE)
Use to transmit the
infrared signal sent by
the IR remote.
Audio Control Modes:
MIC: turn up/down the
microphone volume.
LINE: turn up/down the line
volume.
BASS: bass of line audio.
TREBLE: treble of line audio.
Audio Inputs
1: RCA stereo audio input.
2: 3.5mm jack
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4. System Diagram
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5. Communication Protocol and Command Codes
Communication Protocol: RS232 Communication Protocol
Baud rate: 9600 Data bit: 8 Stop bit: 1 Parity bit: none
Command
Function Description
Feedback Code
1A1.
Switch the audio to input 1
A: 1 -> 1
2A1.
Switch the audio to input 2
A: 2 -> 1
0A0.
Mute Audio of MIC and Line out
Mute
1A0.
Mute audio of MIC
Mute MIC
2A0.
Mute audio of LINE
Mute LIN
0A1.
Unmute MIC and LINE
Unmute
3A0.
Enable Noise Gate
Gate On
4A0.
Disable Noise Gate
Gate Off
600%
Status query
A: 1 -> 1
Volume: 30
Bass: 00
Treble: 00
601%
MIC volume up
Volume of MIC: 51
602%
MIC volume down
Volume of MIC: 51
603%
LINE volume up
Volume of LINE: 51
604%
LINE volume down
Volume of LINE: 51
605%
Bass level up
Bass of LINE: 04
606%
Bass level down
Bass of LINE: 04
607%
Treble level up
Treble of LINE: 04
608%
Treble level down
Treble of LINE: 04
609%
Factory reset
Init OK
5[xx]%
Set MIC volume, [xx] ranges from
[00] to [60].
61 values in total.
Volume of MIC: 50
7[xx]%
Set LINE volume, [xx] ranges from
[00] to [60].
61 values in total.
Volume of LINE: 50
8[xx]%
Set the bass level, [xx] ranges from
[00] to [08].
9 values in total.
Bass of LINE: 04
9[xx]%
Set the treble level, [xx] ranges from
[00] to [08].
9 values in total.
Treble of LINE: 04
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Notice:
1: Letters inside brackets [ ] is variable.
2: The brackets [ ] should not be included in the RS232 commands.
3: Any dot “.” after the code should be included in the RS232 commands.
Example 1:
Switch to input 2, the RS232 command is: 2A1.
Example 2:
Increase the volume of line audio, the RS232 command is: 603%
Example 3:
Set the MIC volume to “21” value, the RS232 command is: 521%
Example 4:
Status query of the TL-A80-20W, the RS232 command is: 600%
6. Specification
I/O Connections
Analog Inputs
One (1) RCA L/R jack, One(1) 3.5mm TRS jack
MIC Input
One(1) 3-pin captive screw connector/3.81mm
IR Input
One(1) 3.5mm TRS Jack
RS232 Control
One(1) 3-pin captive screw connector/3.81mm
Button Control(Top Panel)
Five(5) buttons in total
MIC Signal Type Selector
One(1) 3-position slider switch
Output Signal Format Selector
One(1) 3-position slider switch
Analog Loop Output
One(1) 3.5mm TRS jack
Amplifier Output
One(1) 4-pin pluggable terminal block/5.08mm
DC 24V Power
One(1) Power connector with locking screw(5.5mm outside
diameter, 2.1mm inside diameter)
Audio Performance
Input Impedance
>10k Ω
Output Impedance
50 Ω Analog output; 4/8 Ω Speaker output
Maximum Rated Power Output
40 Watts
Frequency Response
120 Hz ~ 20 kHz
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Common Mode Rejection Ratio
(CMRR)
>70 dB at 20 Hz ~ 20 kHz
Signal to Noise Ratio (SNR)
80 dB (Max)
Total Harmonic Distortion +
Noise (THD+N)
1% at 1 kHz; 0.3% at 20 kHz at Nominal Level
Voltage Gain
32 dB
Chassis and Environmental
Enclosure
Painted aluminum
Dimensions(W x H x D)
123.0mm x 39.5mm x 87mm (4.84in x 1.56in x 3.43in)
Shipping Weight
0.83Kg(1.83bls)
Operating Temperature
(Environment)
-10° ~ +40° C(+14° ~ +104° F)
Operating Temperature
(Chassis)
45° C(113° F)
Operating Humidity
(Environment)
10% ~ 90% Non-condensing
Storage Temperature
(Environment)
-15° ~ +70° C(+5° ~ +158° F)
Storage Humidity
(Environment)
10% ~ 90% Non-condensing
Power, ESD, Regulatory
Power Supply
DC 24V at 2A
ESD Protection
15KV
Regulatory
CE, FCC
Other
Standard Warranty
3 Year
Indicators
1 Power, 2 Input select ,4 Signal select, 1 Up, 1 Down, 1
Mute
Included Items
Installation guide, Power adapters, Mounting ears(2 ea),
RS232 cable, Rubber feet(4 ea), Pluggable terminal blacks(2
ea)
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Panel Drawings
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7. Troubleshooting & Maintenance
1) When there is no output audio:
l Check if there is any signal at the input.
l 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, the input/output cables may be damaged or the connectors loose,
please change the cable.
l Check if the correct input is selected.
2) If the POWER indicator doesn’t illuminate or the unit does not function at all, please
make sure the power cord connection is good and the circuit is energized.
3) If static or noise is present in the output audio, please make sure the system is
grounded well.
4) If the static becomes stronger when connecting the audio connectors, the unit is
grounded improperly.
5) If the TL-A80-20W amplifier cannot be controlled by the keys on the front panel,
RS232 port or IR remote, the unit may be damaged. Please contact reseller for
replacement.
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8. After-sales Service
If you experience issues when operating this device, please check the troubleshooting
guide in this user manual.
1) Product Limited Warranty: We warrant that our products will be free from defects in
materials and workmanship for three years. Please see the warranty page posted on
www.tlnetworx.com for more info.
2) What the warranty does not cover (servicing available for a fee):
l Warranty ex piration.
l Fac tory appli ed ser ial n umber has be en alt ere d or removed from the p rod uct.
l Damage, deterioration or malfunction caused by:
l Normal wear and tear
l Use of supplies or parts not meeting our specifications
l No certificate or invoice as the proof of warranty.
l The product model showed on the warranty card does not match with the
model of the product for repairing or had been altered.
l Damage caused by force majeure.
l Servicing not authorized
l Any other causes which does not relate to a product defect
l Delivery, installation or labor charges for installation or setup of the product
3) Te c h n i c a l S u p p o r t : Email or call to our support department ([email protected]),
please provide the following information about your case.
l Product version and name.
l Detailed failure situations.
l Any open case number.
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