TA-50
mini power amp
module
user manual
Musikhaus Thomann e. K.
Treppendorf 30
96138 Burgebrach
Germany
Telephone: +49 (0) 9546 9223-0
E-mail: info@thomann.de
Internet: www.thomann.de
28.05.2014, ID: 328775
Table of contents
1 General information................................................................................................................................. 4
1.1 Further information........................................................................................................................... 5
1.2 Notational conventions.................................................................................................................... 6
1.3 Symbols and signal words............................................................................................................... 6
2 Safety instructions..................................................................................................................................... 8
3 Features....................................................................................................................................................... 12
4 Installation and starting up................................................................................................................ 13
5 Connections and operating elements........................................................................................... 14
6 Technical specifications....................................................................................................................... 17
7 Plug and connection assignment.................................................................................................... 18
8 Cleaning....................................................................................................................................................... 21
9 Protecting the environment.............................................................................................................. 22
Table of contents
TA-50
3
1 General information
This manual contains important instructions for the safe operation of the unit. Read and follow
the safety instructions and all other instructions. Keep the manual for future reference. Make
sure that it is available to all those using the device. If you sell the unit please make sure that
the buyer also receives this manual.
Our products are subject to a process of continuous development. Thus, they are subject to
change.
General information
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4
1.1 Further information
On our website (www.thomann.de) you will find lots of further information and details on the
following points:
Download This manual is also available as PDF file for you to download.
Keyword search
Use the search function in the electronic version to find the topics of
interest for you quickly.
Online guides
Our online guides provide detailed information on technical basics
and terms.
Personal consultation For personal consultation please contact our technical hotline.
Service
If you have any problems with the device the
customer service will gladly assist you.
General information
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1.2 Notational conventions
This manual uses the following notational conventions:
The letterings for connectors and controls are marked by square brackets and italics.
Examples: [VOLUME] control, [Mono] button.
1.3 Symbols and signal words
In this section you will find an overview of the meaning of symbols and signal words that are
used in this manual.
Letterings
General information
mini power amp module
6
Signal word Meaning
DANGER! This combination of symbol and signal word indicates an
immediate dangerous situation that will result in death or
serious injury if it is not avoided.
CAUTION! This combination of symbol and signal word indicates a pos‐
sible dangerous situation that can result in minor injury if it
is not avoided.
NOTICE! This combination of symbol and signal word indicates a pos‐
sible dangerous situation that can result in material and
environmental damage if it is not avoided.
Warning signs Type of danger
Warning – danger zone.
General information
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7
2 Safety instructions
This device amplifies electric audio frequency signals to operate passive speakers. Use the
device only as described in this user manual. Any other use or use under other operating con‐
ditions is considered to be improper and may result in personal injury or property damage. No
liability will be assumed for damages resulting from improper use.
This device may be used only by persons with sufficient physical, sensorial, and intellectual
abilities and having corresponding knowledge and experience. Other persons may use this
device only if they are supervised or instructed by a person who is responsible for their safety.
DANGER!
Danger for children
Ensure that plastic bags, packaging, etc. are disposed of properly and are not
within reach of babies and young children. Choking hazard!
Ensure that children do not detach any small parts (e.g. knobs or the like) from
the unit. They could swallow the pieces and choke!
Never let children unattended use electrical devices.
Intended use
Safety
Safety instructions
mini power amp module
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CAUTION!
Possible hearing damage
The device can produce volume levels that may cause temporary or permanent
hearing impairment. Over an extended period of time, even levels that seem to
be uncritical can cause hearing damage.
Decrease the volume level immediately if you experience ringing in your ears or
hearing impairment. If this is not possible, keep a greater distance or use suffi‐
cient ear protectors.
NOTICE!
Risk of fire
Do not cover the device nor any ventilation slots. Do not place the device near
any direct heat source. Keep the device away from naked flames.
Safety instructions
TA-50
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NOTICE!
Operating conditions
This device has been designed for indoor use only. To prevent damage, never
expose the device to any liquid or moisture. Avoid direct sunlight, heavy dirt, and
strong vibrations.
NOTICE!
Magnetic fields
The device generates strong magnetic fields that can interfere with the function
of poorly shielded devices. The strongest magnetic fields are directly above and
below the power amplifier. Therefore, never place sensitive devices such as preamplifiers, radio transmission systems, or tape decks directly above or below the
power amplifier. When installing the power amplifier into a rack, you should place
it in the lowest position, and further equipment such as pre-amplifiers in the
highest position.
Safety instructions
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NOTICE!
External power supply
The device is powered by an external power supply. Before connecting the
external power supply, ensure that the input voltage (AC outlet) matches the
voltage rating of the device and that the AC outlet is protected by a residual cur‐
rent circuit breaker. Failure to do so could result in damage to the device and pos‐
sibly the user.
Unplug the external power supply before electrical storms occur and when the
device is unused for long periods of time to reduce the risk of electric shock or
fire.
Safety instructions
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3 Features
n Minimal space requirement
n Ideal for mounting on flat panel displays, in suspended ceilings,…
n Output power: 2 × 17 W @ 4 Ω (2 × 20 W max.)
n Integrated limiter
n Suitable DC 24 V power supply included
Features
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4 Installation and starting up
Unpack and carefully check that there is no transportation damage before using the unit. Keep
the equipment packaging. To fully protect the device against vibration, dust and moisture
during transportation or storage use the original packaging or your own packaging material
suitable for transport or storage, respectively.
Establish all connections as long as the unit is switched off. Use the shortest possible highquality cables for all connections.
The device is suited for mounting on flat panel displays, in suspended ceilings etc. Two suit‐
able mounting brackets are included.
Installation and starting up
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5 Connections and operating elements
Connections and operating elements
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1 [STEREO | BRIDGE]
Switch for operating modes ‘STEREO’ (channels operate independently of each other) and ‘BRIDGED’ (channels are
interconnected to form one channel with double output).
2 [LIMITER OFF | ON]
On / off switch for the integrated limiter.
3 [VOLUME]
Volume control.
4 [POWER]
Power indicator.
5 [DC 24V IN]
Phoenix terminals to connect the supplied 24 V power adapter for power supply.
Connections and operating elements
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6 [INPUT]
Input socket (3.5 mm mini phone jack) for connecting the signal source.
7 [SPEAKER OUTPUT]
Phoenix terminals to connect speaker boxes in bridged (one speaker box with 8 Ω) or stereo mode (two speaker
boxes with 4 Ω each), see wiring diagram on the unit.
Connections and operating elements
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6 Technical specifications
Output power 2 x 20 W @ 4 Ω
Frequency range 35 Hz…50 kHz, -3.5 dB
Input sensitivity 330 mV (17 W, 4 Ω)
Input impedance 10 kΩ
Signal-to-noise ratio -95 dB (4 Ω, 1 K)
THD 6.5 %
Protection circuit Limiter
Control indicator Power
Power consumption at half output power 40 W
Operating supply voltage
DC 24 V
Dimensions (W × D × H) 145 mm × 95 mm × 45 mm
Weight 0.6 kg
Technical specifications
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7 Plug and connection assignment
This chapter will help you select the right cables and plugs to connect your valuable equip‐
ment in such a way that a perfect sound experience is ensured.
Please note these advices, because especially in ‘Sound & Light’ caution is indicated: Even if a
plug fits into the socket, an incorrect connection may result in a destroyed power amp, a short
circuit or ‘just’ in poor transmission quality!
Unbalanced transmission is mainly used in semi-professional environment and in hifi use.
Instrument cables with two conductors (one core plus shielding) are typical representatives of
the unbalanced transmission. One conductor is ground and shielding while the signal is trans‐
mitted through the core.
Unbalanced transmission is susceptible to electromagnetic interference, especially at low
levels, such as microphone signals and when using long cables.
In a professional environment, therefore, the balanced transmission is preferred, because this
enables an undisturbed transmission of signals over long distances. In addition to the conduc‐
tors ‘Ground’ and ‘Signal’, in a balanced transmission a second core is added. This also transfers
the signal, but phase-shifted by 180°.
Introduction
Balanced and unbalanced trans‐
mission
Plug and connection assignment
mini power amp module
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Since the interference affects both cores equally, by subtracting the phase-shifted signals, the
interfering signal is completely neutralized. The result is a pure signal without any noise inter‐
ference.
1 Signal
2 Ground
1 Signal (in phase, +)
2 Signal (out of phase, –)
3 Ground
1/4" TS phone plug (mono,
unbalanced)
3.5 mm TRS phone plug (mono,
balanced)
Plug and connection assignment
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1 Signal (left)
2 Signal (right)
3 Ground, shielding
Three-pole 1/8" mini phone jack
(stereo, unbalanced)
Plug and connection assignment
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8 Cleaning
The fan grids of the device must be cleaned on a regular basis to remove dust and dirt. Before
cleaning, switch off the device and disconnect AC-powered devices from the mains. Use a lintfree damp cloth for cleaning. Never use solvents or alcohol for cleaning.
Fan grids
Cleaning
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9 Protecting the environment
For the transport and protective packaging, environmentally friendly materials have been
chosen that can be supplied to normal recycling.
Ensure that plastic bags, packaging, etc. are properly disposed of.
Do not just dispose of these materials with your normal household waste, but make sure that
they are collected for recycling. Please follow the notes and markings on the packaging.
This product is subject to the European Waste Electrical and Electronic Equipment Directive
(WEEE). Do not dispose with your normal household waste.
Dispose of this device through an approved waste disposal firm or through your local waste
facility. When discarding the device, comply with the rules and regulations that apply in your
country. If in doubt, consult your local waste disposal facility.
Disposal of the packaging mate‐
rial
Disposal of your old device
Protecting the environment
mini power amp module
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Musikhaus Thomann e.K. · Treppendorf 30 · 96138 Burgebrach · Germany · www.thomann.de
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