MBA120W MKII HT
battery-powered
speaker
user manual
Musikhaus Thomann
Thomann GmbH
Hans-Thomann-Straße 1
96138 Burgebrach
Germany
Telephone: +49 (0) 9546 9223-0
E-mail: info@thomann.de
Internet: www.thomann.de
17.12.2020, ID: 466279 (V3)
Table of contents
Table of contents
1 General information................................................................................................................................. 5
1.1 Further information........................................................................................................................... 6
1.2 Notational conventions.................................................................................................................... 7
1.3 Symbols and signal words............................................................................................................... 8
2 Safety instructions.................................................................................................................................. 10
3 Features....................................................................................................................................................... 16
4 Installation.................................................................................................................................................. 18
4.1 Speaker................................................................................................................................................ 19
4.2 Remote control................................................................................................................................. 21
4.3 UHF handheld transmitter............................................................................................................ 22
5 Connections and operating elements........................................................................................... 23
5.1 UHF receiver....................................................................................................................................... 25
5.2 Speaker................................................................................................................................................ 28
5.3 Remote control................................................................................................................................. 41
5.4 UHF handheld transmitter............................................................................................................ 45
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Table of contents
6 Technical specications....................................................................................................................... 48
6.1 Speaker................................................................................................................................................ 48
6.2 UHF receiver....................................................................................................................................... 51
6.3 UHF handheld transmitter............................................................................................................ 51
7 Plug and connection assignment.................................................................................................... 53
8 Cleaning....................................................................................................................................................... 57
9 Protecting the environment.............................................................................................................. 58
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1 General information
This user manual contains important information on the safe operation of the device. Read and
follow all safety notes and all instructions. Save this manual for future reference. Make sure
that it is available to all persons using this device. If you sell the device to another user, be sure
that they also receive this manual.
Our products and user manuals are subject to a process of continuous development. We there‐
fore reserve the right to make changes without notice. Please refer to the latest version of the
user manual which is ready for download under www.thomann.de.
General information
MBA120W MKII HT
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General information
1.1 Further information
On our website (www.thomann.de) you will nd lots of further information and details on the
following points:
Download This manual is also available as PDF le for you to download.
Keyword search
Online guides
Personal consultation For personal consultation please contact our technical hotline.
Service
Use the search function in the electronic version to nd the topics of
interest for you quickly.
Our online guides provide detailed information on technical basics
and terms.
If you have any problems with the device the customer service will
gladly assist you.
battery-powered speaker
6
1.2 Notational conventions
This manual uses the following notational conventions:
General information
Letterings
Displays
Cross-references
The letterings for connectors and controls are marked by square brackets and italics.
Examples: [VOLUME] control, [Mono] button.
Texts and values displayed on the device are marked by quotation marks and italics.
Examples: ‘24ch’ , ‘OFF’.
References to other locations in this manual are identied by an arrow and the specied page
number. In the electronic version of the manual, you can click the cross-reference to jump to
the specied location.
Example: See Ä ‘Cross-references’ on page 7.
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General information
1.3 Symbols and signal words
In this section you will nd an overview of the meaning of symbols and signal words that are
used in this manual.
Signal word Meaning
DANGER! This combination of symbol and signal word indicates an
CAUTION! This combination of symbol and signal word indicates a pos‐
NOTICE! This combination of symbol and signal word indicates a pos‐
immediate dangerous situation that will result in death or
serious injury if it is not avoided.
sible dangerous situation that can result in minor injury if it
is not avoided.
sible dangerous situation that can result in material and
environmental damage if it is not avoided.
battery-powered speaker
8
Warning signs Type of danger
Warning – high-voltage.
Warning – danger zone.
General information
MBA120W MKII HT
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Safety instructions
2 Safety instructions
Intended use
10
This device is designed for sound reinforcement. Use the device only as described in this user
manual. Any other use or use under other operating conditions 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 sucient 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.
battery-powered speaker
Safety instructions
DANGER!
Electric shock caused by high voltages inside
Within the device there are areas where high voltages may be present. Never
remove any covers.
There are no user-serviceable parts inside.
Do not use the device if covers, protectors or optical components are missing or
damaged.
DANGER!
Electric shock caused by short-circuit
Always use proper ready-made insulated mains cabling (power cord) with a pro‐
tective contact plug. Do not modify the mains cable or the plug. Failure to do so
could result in electric shock/death or re. If in doubt, seek advice from a regis‐
tered electrician.
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Safety instructions
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 su‐
cient ear protectors.
NOTICE!
Risk of re
Do not block areas of ventilation. Do not install the device near any direct heat
source. Keep the device away from naked ames.
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battery-powered speaker
Safety instructions
NOTICE!
Power supply
Before connecting the device, ensure that the input voltage (AC outlet) matches
the voltage rating of the device and that the AC outlet is protected by a residual
current circuit breaker. Failure to do so could result in damage to the device and
possibly injure the user.
Unplug the device before electrical storms occur and when it is unused for long
periods of time to reduce the risk of electric shock or re.
NOTICE!
Risk of re due to incorrect polarity
Incorrectly inserted batteries may destroy the device or the batteries.
Ensure that proper polarity is observed when inserting batteries.
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Safety instructions
NOTICE!
Possible damage by leaking batteries
Leaking batteries can cause permanent damage to the device.
Take batteries out of the device if it is not going to be used for a longer period.
NOTICE!
Possible damage of VRLA batteries due to incorrect storage
VRLA batteries may be permanently damaged due to storage in discharged or
partly discharged condition.
Charge the batteries completely before prolonged rest periods. Store the bat‐
teries at +20 °C or cooler, but frost-free in as dry an environment as possible.
Higher temperatures reduce considerably the lifetime of the batteries.
Storing the batteries up to six months allows to use them again directly. During
extended storage periods (max. 12 to 18 months), the batteries should be
recharged to avoid permanent damage due to deep self-discharge.
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battery-powered speaker
Safety instructions
Notes on radio transmission
n This equipment uses a frequency range that is free of charge and registration within the
European Union.
For more information, please visit: http://www.thomann.de.
n When operating, make sure that transmitter and receiver are set to the same channel.
n Never set more than one transmitter to the same channel.
n Make sure that no metal objects are located between transmitter and receiver.
n Avoid interference by other radio and in-ear systems.
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Features
3 Features
The mobile PA system is characterized by the following features:
n Compact all-in-one system
n 1 × UHF wireless system (863 MHz … 865 MHz)
– 1 × integrated UHF receiver
– 1 × UHF handheld transmitter
– 1 × antenna
n Power supply via AC mains power or through the built-in rechargeable VRLA batteries
n 10" woofer, 1" compression driver
n 120 W output power in mains operation, 80 W in battery operation
n Frequency range 55 Hz … 18 kHz
n 2-band equalizer
n Integrated adjustable Delay (Echo) eect
n Slot for optional second UHF receiver
n Built-in media player with display, SD card slot, USB port and Bluetooth receiver
n Infrared remote control
n 2 × MIC / Line inputs, 1 × stereo input, 2 × RCA inputs
n 1 × line output
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battery-powered speaker
n Plastic housing with pole mount, carrying handle, trolley handle and casters
n Spacious storage compartment for accessories embedded in the housing
n Compatible cover (item no. 382254) not included
Features
MBA120W MKII HT
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Installation
4 Installation
Unpack and check carefully there is no transportation damage before using the unit. Keep the
equipment packaging. To fully protect the product against vibration, dust and moisture during
transportation or storage use the original packaging or your own packaging material suitable
for transport or storage, respectively.
Create all connections while the device is o. Use the shortest possible high-quality cables for
all connections. Take care when running the cables to prevent tripping hazards.
NOTICE!
Possible property damage by magnetic elds
Loudspeakers produce a static magnetic eld. Therefore, maintain an appropriate
distance to devices that can be adversely aected or damaged by an external
magnetic eld.
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battery-powered speaker
4.1 Speaker
Installation
Battery operation
Installation and replacement of
VRLA rechargeable batteries
You can also operate the device independently of the mains power supply with the supplied
integrated VRLA rechargeable batteries.
Disconnect the device from the mains.
Remove the mounting screw of the battery compartment cover. Remove the two mounting
screws of the xing plate. Use only suitable VRLA rechargeable batteries of the same size and
type (see Ä Chapter 6.1 ‘Speaker’ on page 48).
The power supply cables are colour-coded and equipped with blade receptacles. To release
the connections, press slightly on the blade receptacle. When tting and wiring VRLA
rechargeable batteries, make sure the polarity is correct:
n red to + (battery 1)
n black to – (battery 2)
n blue connects + and – of the two rechargeable batteries
Then attach the rechargeable batteries with the xing plate in the battery compartment (two
screws) and replace the battery cover of the unit (one screw).
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Installation
Tips on handling VRLA
rechargeable batteries
n Charge the batteries completely before rst use and with each charging process.
n Avoid deep discharge.
n Charge the batteries completely after each use and before extended storage. VRLA bat‐
teries may be permanently damaged due to storage in discharged or partly discharged
condition.
n Storing the batteries up to six months allows to use them again directly. During extended
storage periods (max. 12 to 18 months), the batteries should be recharged to avoid perma‐
nent damage due to deep self-discharge.
battery-powered speaker
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4.2 Remote control
Installation
Inserting the battery into the
remote control
Press the lock of the battery holder to the centre of the housing and pull out the battery holder
like a drawer. Insert the battery. The battery is correct if the positive pole points to the housing
base of the remote control. Slide the battery holder back into the remote until it clicks into
place.
When shipping, the battery is already installed in the remote and protected against discharge
by a transparent plastic foil. Remove the plastic foil prior to rst use.
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Installation
4.3 UHF handheld transmitter
Installation and replacement of
batteries
The battery compartment of the UHF handheld transmitter is located under the grip sleeve
and shares the same thread with the microphone capsule. To access the battery compartment
without accidentally unscrewing the microphone capsule, hold the UHF handheld transmitter
at the bottom of the antenna base and turn the sleeve as shown. After replacing the battery,
close the compartment again. Take care not to over tighten the grip sleeve.
Use only LR6 AA (1.5 V) batteries or rechargeable Ni-MH batteries (nickel metal hydride). Note
the correct polarity when inserting the batteries.
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battery-powered speaker
5 Connections and operating elements
Rear view - overview
Connections and operating elements
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Connections and operating elements
Left gure: Device with 1 UHF receiver (item no. 466279, 490317)
Right gure: Device with 2 UHF receivers (item no. 490318, 490319, 490320)
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battery-powered speaker
5.1 UHF receiver
Partial view A
Connections and operating elements
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Connections and operating elements
1 Channel display.
Double-digit display for selecting and displaying the radio transmission channel (range ‘01’ … ‘16’).
2 [RF | AF]
The red indicator LED [RF] lights up when a radio signal is transmitted between UHF handheld transmitter and UHF
receiver.
The green indicator LED [AF] lights up when an audio signal from an external device is present.
3 [ASC]
Press this button to transfer the channel setting from the device via the infrared port to the microphone.
4 [IR]
Infrared transmitter for transmitting the channel setting from the device to the UHF handheld transmitter.
5 Item no. 466279 and 490317: Additional compartment for a second UHF receiver and second antenna jack.
For mounting a second UHF receiver loosen the two screws and remove the cover plate. The cables for power supply
and signal transmission are already prepared and equipped with suitable plugs. Carefully loosen the cables out of the
device housing and plug them to the corresponding connectors of the UHF receiver. Place the second UHF receiver
in the compartment and fasten it with the two mounting screws. Keep the cover in a safe place.
Item no. 490318, 490319 and 490320: Second UHF receiver and second antenna connection socket.
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battery-powered speaker
Connections and operating elements
6 [DOWN | UP]
Pushbutton for selecting the radio transmission channel.
Proceed as follows to nd a free channel:
n Turn o the UHF handheld transmitter with the slide switch [ON/OFF] and the UHF receiver with the controller
[POWER-VOL].
n Use [DOWN | UP] to switch through the available channels. If the displayed channel is already in use, the red LED
[RF]. When a free channel is found, press the [ASC] button to transmit the settings to the transmitter.
The rst and (if applicable) second UHF receiver must be tuned to dierent channels.
7 Antenna connector.
8 [MUTE LEVEL]
Control to set the minimum signal strength on the radio transmission channel.
9 [POWER-VOL]
On / o switch and volume control of the UHF receiver.
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Connections and operating elements
5.2 Speaker
5.2.1 Partial view B
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battery-powered speaker
Connections and operating elements
1 SD card slot
2 Display
3 USB port
4 Selection and control buttons:
[MODE]
Selection button. Press this button to select an audio source: SD card, USB input or Bluetooth port. The active source
is shown on the display.
For setting up and using the Bluetooth interface note Ä Chapter 5.2.5 ‘Playback via Bluetooth’ on page 39.
Depending on operating mode, Play / Pause button to start / stop playback or button to select a menu item.
Stop button to stop playback
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Connections and operating elements
Selection button. Press the button repeatedly to activate a playback mode. The active mode and the title of the cur‐
rent track will appear on the display:
n Normal ‘N’ . All tracks of the selected audio source are played in succession according to the MP3 le date. The
prerequisite for this is that a subdirectory with the desired titles has been created on the data medium.
n Random ‘R’ . All tracks of the selected audio source are played in random order.
n Intro ‘I’ . The rst ten seconds of each track of the selected audio source will be played.
n All ‘A’ . All tracks in endless loop, like Normal mode.
n Single ‘1’ . Only the selected track is repeated in a loop.
n Folder ‘F’ . All tracks of a specic folder of the selected audio source are being played.
Depending on operating mode, Skip forward (to the next track) or switch to the next menu option.
Keep this button pressed to increase the volume of the internal media player.
Depending on operating mode, Skip backwards (to the previous track) or switch to the previous menu option.
Keep this button pressed to decrease the volume of the internal media player. We highly recommend to keep this
volume at maximum value and adjust the volume with the controller [LEVEL] (24).
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battery-powered speaker
Connections and operating elements
5 [LEVEL]
Gain control for channel 3. Use this control to adjust the level of the input signal in Channel 3.
6 [ON | LIMIT]
Indicator LED (green). This LED lights solid in normal operation and ickers when the box is overdriven. In this case,
turn the gain control of the active channel down to reduce the level of the input signal.
7 [MASTER]
Volume control. Use this control to adjust the overall volume of the device (sum of all input channels).
8 [EFFECT]
Eects control. Use this control to adjust the amount of built-in Delay eect on the overall volume for all channels.
9 [EQ LOW | HIGH]
Equalizer. Controller for adjusting the high and low frequencies in a range of [–15] … [+15].
10 [CH3]
Signal input for channel 3, designed as XLR / 1/4" jack combo socket, beneath toggle switch for LINE and MIC input
signal level.
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Connections and operating elements
11 [CH2]
Signal input for channel 2, designed as XLR / 1/4" combo socket, beneath switch between LINE and MIC input signal
level.
12 [CH1]
RCA input sockets to connect an external audio device to channel 1.
13 [LINE IN]
3.5 mm input socket to connect an external audio device to channel 1.
14 [LEVEL]
Gain control for channel 2. Use this control to adjust the level of the input signal in Channel 2.
15 [LEVEL]
Gain control for channel 1. Use this control to adjust the level of the input signal in Channel 1.
16 [CHI | MP]
Channel 1 input signal switch: external device via RCA sockets / 3.5 mm jack or built-in media player.
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battery-powered speaker
5.2.2 Partial view C
Connections and operating elements
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Connections and operating elements
1 [BATTERY LEVEL]
Charging indicator.
If only the red LED [LOW] lights, the remaining battery capacity is low (<20 %). Then connect the device to the mains
power to charge the batteries.
During charging, the red LED [LOW] lights and the green LEDs [1] … [3] light up one by one depending on charging
level ([1] = 40 %, [2] = 60 %, [3] = 100 %).
When the batteries are completely charged, the red LED [LOW] turns o and the three green LEDs light. When
capacity decreases, the green LEDs turn o one by one.
Please refer also to the instructions in section Ä Chapter 4.1 ‘Speaker’ on page 19.
2 [LINE OUT]
Line output (1/4" socket) to connect an amplier, a PA or an additional speaker.
3 [POWER]
On / o switch and fuse holder.
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battery-powered speaker
Connections and operating elements
4 [CHARGE]
This LED lights green during charging. Once the installed battery pack is fully charged, the LED turns o.
5 IEC chassis plug for power connection and mains voltage selector switch.
Once the unit is connected to the mains, the built-in rechargeable batteries are being charged even when the power
is o.
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Connections and operating elements
5.2.3 Partial view D
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battery-powered speaker
Connections and operating elements
1 Mounting screws of the xing plate
2, 3 VRLA batteries 1 and 2
Observe the correct polarity when wiring the batteries. Connect the red cable to the positive pole of battery 1 and
the black cable to the negative pole of battery 2. Use the blue cable to connect the negative pole of battery 1 to the
positive pole of battery 2.
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Connections and operating elements
5.2.4 Display
a Play/Pause.
b Endless loop.
c Number of the currently playing track and number of tracks in the current folder.
d Selected EQ setting.
e Bit rate and le type of the currently playing track.
f Symbol for the selected data source.
g Elapsed time / total time of the currently playing track.
h Frequency spectrum bar graph.
i File name of the currently playing track.
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battery-powered speaker
5.2.5 Playback via Bluetooth
Connections and operating elements
Establishing connection to Bluetooth device
Follow the instructions given in the manual of the Bluetooth device and turn it on. Place it near
the device.
Press [MODE] and select the Bluetooth interface as the source for playback. After a few seconds
your Bluetooth device is detected. The display shows the message ‘BT Connected’ . If it does
not work automatically, press and start synchronisation from the Bluetooth device.
Bluetooth menu
Hold [MODE] pressed for a few seconds to open the Bluetooth menu.
To navigate within the menu, use [PREV / NEXT]. To select an option, use [PLAY / PAUSE].
The menu oers the following options:
n ‘Recently reconnection’ – re-connect to the last used Bluetooth device.
n ‘EQ’
– ‘Normal’ – Normal
– ‘Pop’ – Pop music
– ‘Rock’ – Rock music
– ‘Jazz’ – Jazz
MBA120W MKII HT
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Connections and operating elements
– ‘Classic’ – Classic music
– ‘County’ – Country music
– ‘Lowbass’ – Bass boost
n ‘Deleted paired info’ – erases all information on last link with a Bluetooth device. Try this
option to solve problems establishing a Bluetooth connection.
n ‘Device Information’ – shows information about the name and address of the Bluetooth
interface of the device on the display.
n ‘Exit’ – to exit the menu.
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battery-powered speaker
5.3 Remote control
Connections and operating elements
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Connections and operating elements
1 [CHANNEL]
No function.
2 [VOL– / VOL+]
To decrease or increase the volume.
3 [PREV / NEXT]
Forward (skip to the next track) or backward (skip to the previous track).
4 Numeric keypad for direct access to tracks.
5 [MODE]
Selection button. Press this button to select an audio source: SD card, USB input or Bluetooth port. The active source
is shown on the display.
For setting up and using the Bluetooth interface note .
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battery-powered speaker
Connections and operating elements
6 [ENTER]
This button opens a menu with the following options:
n ‘EQ’ – selects an equalizer setting, corresponds to the key [EQ] on the remote.
n ‘PLAY MODE’ – selects a play mode, corresponds to the key on the unit.
n ‘CHANGE DEVICE’ – selects an audio source, corresponds to the key [MODE] on the remote.
n ‘EXIT’ – to exit the selection menu.
To navigate within the selection menu use [PREV / NEXT]. To select an option use [PLAY/PAUSE].
7 [PICK SONG]
No function.
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Connections and operating elements
8 [EQ]
Selects an EQ setting:
n ‘NOR’ – Normal
n ‘POP’ – Pop music
n ‘ROCK’ – Rock music
n ‘JAZZ’ – Jazz
n ‘CLAS’ – Classic music
n ‘COU’ – Country music
n ‘BAS’ – Bass boost
9 [PLAY/PAUSE]
Play / pause button to start / stop playback.
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battery-powered speaker
5.4 UHF handheld transmitter
Connections and operating elements
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Connections and operating elements
1 Microphone head grill to prevent damage and to reduce wind and breath noise.
2 Lower housing part. Unscrew to open.
3 [BATT]
This LED shows the state of the batteries. When the UHF handheld transmitter is turned on and the capacity of the
battery is sucient, the LED lights green. When the batteries are exhausted, the LED lights red.
4 [ON/OFF]
Slide switch to turn the UHF handheld transmitter on and o.
5 Infrared sensor for receiving the channel setting from the device to the UHF handheld transmitter. The sensor is
accessible after removal of the lower housing part. After each change, transfer the channel setting from the device to
the UHF handheld transmitter. Place the UHF handheld transmitter as close as possible to the device and then press
[ASC]. The LED [RF ] LED lights up when the transmission was successful.
6 Battery compartment for 2 AA cells (LR6, 1.5 V) or appropriate rechargeable batteries.
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battery-powered speaker
Connections and operating elements
7 [GAIN]
Control to adjust the sensitivity of the UHF handheld transmitter.
8 [H/L]
Switch for selecting the transmission level. In ‘L’ position, a low level is used to save the batteries. As a result, the
range is reduced to about 10 m. In ‘H’ position, a high level is used for an expanded transmission range (about 30 m).
This reduces battery life.
MBA120W MKII HT
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Technical specications
6 Technical specications
6.1 Speaker
Speaker Two-way system with 1" compression driver and 10" woofer
Input connections Microphone/Line 2 × XLR/1/4" combo socket
Line (stereo) 1 × 3.5 mm jack socket
2 × RCA sockets for additional signal input, for
CD players or similar devices with line out
signal
USB port USB A
Power supply IEC chassis plug C14
Output connector Line out 1 × 1/4" phone socket
Output power 120 W (mains operation)
80 W (battery operation)
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battery-powered speaker
Frequency range 55 Hz … 18 kHz, –3 dB
Power consumption 43 W
Technical specications
Supply voltage
Fuse 110 V: 5 mm × 20 mm, 2 A, 250 V, slow-blow
Operating time per battery charge Music: approx. 4 h
Charging time 10 h … 12 h
Battery remote control Battery type Lithium button cell, 3 V, CR 2025
Dimensions (W × H × D) 360 mm × 290 mm × 567 mm
110 V , 60 Hz / 230 V , 50 Hz
2 × 12 V lead-gel rechargeable batteries (VRLA batteries, 5 Ah each), maintenance-free
Recommended types:
n Ritar RT1250
n Fiamm FG20451
230 V: 5 mm × 20 mm, 1 A, 250 V, slow-blow
Speech: approx. 6 h
MBA120W MKII HT
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Technical specications
Weight 19 kg
Ambient conditions Temperature range 0 °C…40 °C
Relative humidity 50 %, non-condensing
Further information
Incl. player Yes
Incl. microphone Yes
Incl. radio system Yes
Incl. subwoofer No
Incl. cover No (optional, item no. 382254)
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battery-powered speaker
6.2 UHF receiver
Carrier frequency UHF band (863 MHz … 865 MHz)
NF frequency response 60 Hz … 16 kHz, –3 dB
Modulation type Frequency modulation (FM)
Signal-to-noise ratio > 100 dB
Transmission power < 10 mW
THD < 0.1 %
6.3 UHF handheld transmitter
Frequency range 863 MHz … 865 MHz
Maximum transmission power 10 mW
Technical specications
Maximum input level –10 dBV
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Technical specications
Input impedance (antenna) 50 Ω
Range (free eld) Up to 30 m
Battery Battery type LR6 AA
or rechargeable Ni-MH batteries (nickel metal hydride)
Voltage 1.5 V
Dimensions (W × H, without antenna) 54 mm × 250 mm
Dimensions antenna (W × H) 13 mm × 250 mm
Weight 270 g
Ambient conditions Temperature range 0 °C…40 °C
Relative humidity 50 %, non-condensing
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battery-powered speaker
7 Plug and connection assignment
Plug and connection assignment
Introduction
Balanced and unbalanced trans‐
mission
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 ts 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 hi 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°.
MBA120W MKII HT
53
Plug and connection assignment
1/4" TS phone plug (mono,
unbalanced)
1/4" TRS phone plug (mono, bal‐
anced)
Since the interference aects 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, shielding
1 Signal (in phase, +)
2 Signal (out of phase, –)
3 Ground
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battery-powered speaker
Three-pole 1/8" mini phone jack
(stereo, unbalanced)
XLR plug (balanced)
Plug and connection assignment
1 Signal (left)
2 Signal (right)
3 Ground, shielding
1 Ground, shielding
2 Signal (in phase, +)
3 Signal (out of phase, –)
4 Shielding on plug housing (option)
MBA120W MKII HT
55
Plug and connection assignment
RCA connection
Drawing and table indicate the pin assignment of an RCA plug.
1 Signal
2 Ground, shielding
battery-powered speaker
56
8 Cleaning
Cleaning
Device components
Clean the device components that are accessible from the outside regularly. The cleaning fre‐
quency depends on the operating environment: damp, smoky or particularly dirty environ‐
ments can cause greater accumulation of dirt on the device components.
n Clean with a dry soft cloth.
n Stubborn dirt can be removed with a slightly dampened cloth.
n Never use solvents or alcohol for cleaning.
MBA120W MKII HT
57
Protecting the environment
9 Protecting the environment
Disposal of the packaging mate‐
rial
For the 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.
Disposal of batteries and
rechargeable batteries
Batteries do contain some hazardous chemicals so they should not be thrown away with the
normal household waste.
Remove lithium batteries from the device before disposal. Protect used lithium batteries
against potential short circuits, e.g. by covering the poles with adhesive tape. Dispose the solid
state lithium batteries together with the device.
Remove VRLA batteries from the device before disposal.
58
battery-powered speaker
Disposal of your old device
Protecting the environment
Dispose of the batteries and rechargeable batteries at relevant collection points or through
your local waste facility.
This product is subject to the European Waste Electrical and Electronic Equipment Directive
(WEEE) in its currently valid version. Do not dispose with your normal household waste.
Dispose of this device through an approved waste disposal rm 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.
MBA120W MKII HT
59
Notes
60
battery-powered speaker
Notes
MBA120W MKII HT
61
Notes
62
battery-powered speaker
Musikhaus Thomann · Hans-Thomann-Straße 1 · 96138 Burgebrach · Germany · www.thomann.de
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