thomann T.Bone IEM 150 User Manual

IEM 150

UHF wireless system

user manual

Musikhaus Thomann

Thomann GmbH

Hans-Thomann-Straße 1

96138 Burgebrach

Germany

Telephone: [phone]

E-mail: [e-mail]

Internet: www.thomann.de

12.06.2019, ID: 439536, 439537, 439539, 439541, 439542, 439543 (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............................................................................................................... 7

2 Safety instructions..................................................................................................................................... 9

3 Features and scope of delivery......................................................................................................... 15

4 Installation.................................................................................................................................................. 19

4.1 General Information........................................................................................................................ 19

4.2 Transmitter......................................................................................................................................... 20

4.3 Receiver............................................................................................................................................... 22

4.4 Taking system in operation.......................................................................................................... 23

5 Connections and controls................................................................................................................... 24

5.1 Transmitter......................................................................................................................................... 24

5.2 Receiver............................................................................................................................................... 30

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Table of contents

6 Operating.................................................................................................................................................... 36

6.1 Setting up the transmitter............................................................................................................ 36

6.2 Setting up the receiver................................................................................................................... 39

7 Technical specications....................................................................................................................... 42

7.1 Transmitter......................................................................................................................................... 42

7.2 Receiver............................................................................................................................................... 45

8 Plug and connection assignment.................................................................................................... 47

9 Troubleshooting...................................................................................................................................... 50

10 Protecting the environment.............................................................................................................. 53

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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

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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.

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1.2 Notational conventions

This manual uses the following notational conventions:

General information

Letterings

Displays

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’.

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.

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General information

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 – high-voltage.

Warning – danger zone.

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2 Safety instructions

Safety instructions

Intended use

Safety

This device is intended to be used for the wireless transmission of audio signals to earplugs.
Use the device only as described in this user manual. Any other use or use under other oper‐
ating 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 sucient 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.

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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.

10

UHF wireless system

Safety instructions

CAUTION!
Possible hearing impairment

The use of earphones at high volume over a longer period of time can cause per‐
manent hearing damage.

Adjust the output volume of your audio device to a medium value and use the
earphones no longer than about one hour a day.

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Safety instructions

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.

Only operate the device within the ambient conditions specied in the chapter
‘Technical specications’ of this user manual. Avoid heavy temperature uctua‐
tions and do not switch the device on immediately after it was exposed to tem‐
perature uctuations (for example after transport at low outside temperatures).

Dust and dirt inside can damage the unit. When operated in harmful ambient
conditions (dust, smoke, nicotine, fog, etc.), the unit should be maintained by
qualied service personnel at regular intervals to prevent overheating and other
malfunction.

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UHF wireless system

Safety instructions

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

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 staining

The plasticiser contained in the rubber feet of this product may possibly react
with the coating of your parquet, linoleum, laminate or PVC oor and after some
time cause permanent dark stains.

In case of doubt, do not put the rubber feet directly on the oor, but use felt-pad
oor protectors or a carpet.

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UHF wireless system

3 Features and scope of delivery

The UHF wireless system IEM 150 is suitable as an in-ear monitoring system especially for pro‐
fessional events, on rock stages and in concert halls, theatres and musicals.

Features and scope of delivery

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Features and scope of delivery

the t.bone IEM 150 640 MHz
(item No. 439536)

Your UHF wireless system IEM 150 640 MHz consists of the following components:

n 9.5" stereo transmitter IEM 150 T

– Very high sensitivity at very high signal-to-noise ratio
– Signal inputs: two XLR sockets
– Output for headphones (3.5 mm and 6.35 mm phone jack) with adjustable volume
– Two outputs for transmitting the input signal to other audio devices (6.35 mm phone

jack)

– Power supply via supplied power adapter

n Bodypack receiver IEM 150 R 640 MHz (also available separately; article No. 439541)

– Earplug outlet (1/8" mini phone socket) with volume control
– Control for volume and balance
– Voltage supply: 2 AA cells (LR6, 1.5 V)

n Earphone EP 4

8 systems can be operated simultaneously. The system operates within a frequency range of
640 MHz to 665 MHz, divided into three frequency groups.

Included accessories: earplugs in various sizes and fastening material for rack mounting

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Features and scope of delivery

the t.bone IEM 150 823 MHz
(item No. 439537)

Your UHF wireless system IEM 150 823 MHz consists of the following components:

n 9.5" stereo transmitter IEM 150 T

– Very high sensitivity at very high signal-to-noise ratio
– Signal inputs: two XLR sockets
– Output for headphones (3.5 mm and 6.35 mm phone jack) with adjustable volume
– Two outputs for transmitting the input signal to other audio devices (6.35 mm phone

jack)

– Power supply via supplied power adapter

n Bodypack receiver IEM 150 R (also available separately; article No. 439542)

– Earplug outlet (1/8" mini phone socket) with volume control
– Control for volume and balance
– Voltage supply: 2 AA cells (LR6, 1.5 V)

n Earphone EP 4

4 systems can be operated simultaneously. The system operates within a frequency range of
823 MHz to 832 MHz, divided into four frequency groups.

Included accessories: earplugs in various sizes and fastening material for rack mounting

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Features and scope of delivery

the t.bone IEM 150 863 MHz
(item No. 439539)

Your UHF wireless system IEM 150 863 MHz consists of the following components:

n 9.5" stereo transmitter IEM 150 T

– Very high sensitivity at very high signal-to-noise ratio
– Signal inputs: two XLR sockets
– Output for headphones (3.5 mm and 6.35 mm phone jack) with adjustable volume
– Two outputs for transmitting the input signal to other audio devices (6.35 mm phone

jack)

– Power supply via supplied power adapter

n Bodypack receiver IEM 150 R (also available separately; article No. 439543)

– Earplug outlet (1/8" mini phone socket) with volume control
– Control for volume and balance
– Voltage supply: 2 AA cells (LR6, 1.5 V)

n Earphone EP 4

2 systems can be operated simultaneously. The system operates within a frequency range of
863 MHz to 865 MHz, divided into four frequency groups.

Included accessories: silicon ear pads and fastening material for rack mounting

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4 Installation

4.1 General Information

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.

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Installation

Notes on wireless transmission

4.2 Transmitter

Rack mounting

Attaching the antenna

n This device utilizes frequencies that are not harmonized within the European Union (EU)

and therefore may only be used in certain EU member states. In all European countries, the
frequencies used for the transmission of audio signals are strictly regulated. Before you
start, make sure the frequencies are allowed in the respective country and check whether
the operation must be reported to the appropriate authority.

For more information, please visit: http://www.thomann.de.

n Make sure that transmitter and receiver are both tuned to the same channel.
n Never set multiple transmitters to the same channel.
n Make sure that there are no metal objects between the transmitter and receiver.
n Avoid interference from other radio or in-ear systems.

The unit has been designed for rack mounting in a standard 9.5" rack; it occupies one rack unit.
The xing material required for assembly is included.

Attach the included antenna to the rear panel of the transmitter. To improve the transmission
quality and to adapt to the spatial conditions it is rotatable and swivelling.

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Installation

Connecting audio and starting
up

Connect the audio inputs of the transmitter with suitable line outputs of your mixer or your
amplier. Set the controls for the volume (6) rst to a middle position.

To get the best sound quality, a ne adjustment of the controller may be required. If the input
level is too hight, switch the noise dampening function on.

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Installation

4.3 Receiver

Inserting batteries into the
receiver

Ensure that the main switch / volume control (16) on the receiver is in the "OFF" position.

22

UHF wireless system

Press simultaneously on the two side closures on the battery compartment, pull it gently
downwards and then fold it completely up. Insert the batteries. Pay attention to the correct
location of the poles.

Fold the battery compartment closed until it engages.

4.4 Taking system in operation

1. Ensure that the transmitter and receiver are switched o. The display on the transmitter

2. Attach the receiver with the clip to your belt or guitar strap.

3. Carefully insert the ear phones into the ear canal, note the markings ‘L’ and ‘R’ for the left

4. Connect the ear phones to the receiver.

5. Switch the transmitter on by pressing the main switch and the receiver by turning the

Installation

is dark; on the receiver, the main switch / volume control is in the "–" position.

and right side.

main switch / volume control and test the transmission. Make sure that transmitter and
receiver are set to the same frequency group and channel. If necessary, adjust the ampli‐

cation of the transmitter and receiver and the levels on your mixing console or your
amplier.

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Connections and controls

5 Connections and controls

5.1 Transmitter

Front panel of transmitter

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UHF wireless system

1 [POWER]

Main switch. Turns the device on and o. To turn on, press this button for about 1 second.

2 Display.

3, 5 [+] / [–]

Buttons to increase or decrease the currently displayed value.

4 [SET]

Enter button for menu control

6 [VOLUME]

Volume control

7 [MONITOR]

Volume control for headphone output

8 3.5 mm jack socket (stereo) to connect headphones.

9 1/4" jack socket (stereo) to connect headphones.

Connections and controls

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Connections and controls

Rear panel of transmitter

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UHF wireless system

Connections and controls

10 Connector for the supplied plug-in power supply.

11 [LOOP OUT CH1, CH2]

1/4" jack sockets (mono). Outputs for routing the audio signal to other InEar transmitters or monitor boxes.

12 [LEFT CH.1 IN] / [RIGHT CH.2 IN]

XLR socket (left and right channel) for direct connection to a mixing console, PA or any other audio device that serves
as signal source.

13 [ANTENNA OUT]

BNC-type chassis socket for the supplied UHF antenna. Make sure that the frequency indicated on the antenna is
within the range that is indicated on the transmitter.

14 UHF antenna

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Connections and controls

Display of the transmitter

A Indicates the frequency that is assigned to the set combination of frequency group

and channel.

B [10mW] / [50mW]

Indicates the set transmit power.

C [STEREO] / [MONO]

Indicates the set operating mode (stereo or mono).

D [RF]

Flashes while the transmit power is being adjusted.

E [MODE]

Flashes while the operating mode is being set.

F [FRQ]

Flashes while the frequency is being adjusted.

G [CH]

Flashes while the channel is being adjusted.

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UHF wireless system

H [GRP]

Flashes while the frequency group is being set.

I [RLF]

Level meter for left channel.

J [ARF]

Level meter for right channel.

Connections and controls

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Connections and controls

5.2 Receiver

Front panel of the receiver

15 Flexible antenna.

16 [– / +]

Main switch and volume control. Turn the knob clockwise past the point of resist‐
ance to turn on the receiver. Turn it further to increase the volume.

Turn the knob counter-clockwise to reduce the volume. Turn it further past the
point of resistance to turn o the receiver.

17 [L/R]

Pan control

18 3.5 mm jack socket (stereo) for the earphones

19 Display

20 [SET]

Enter button for menu control

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UHF wireless system

Connections and controls

21, 22 [+] / [–]

Buttons to increase or decrease the currently displayed value.

23 Fastenings of the battery compartment for 2 AA cells (LR6, 1.5 V) or appropriate

rechargeable batteries.

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Connections and controls

Top panel of the receiver

15 Flexible antenna.

16 [OFF/ON/VOL]

Main switch and volume control. Turn the knob clockwise past the point of resist‐
ance to turn on the receiver. Turn it further to increase the volume.

Turn the knob counter-clockwise to reduce the volume. Turn it further past the
point of resistance to turn o the receiver.

17 [L/R]

Pan control.

18 3.5 mm jack socket (stereo) for the earphones.

24 Clip for attaching the transmitter to the guitar strap or on the body, for example on

the belt.

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UHF wireless system

Rear panel of the receiver

Connections and controls

15 Flexible antenna

16 [OFF/ON/VOL]

Main switch and volume control. Turn the knob clockwise past the point of resist‐
ance to turn on the receiver. Turn it further to increase the volume.

Turn the knob counter-clockwise to reduce the volume. Turn it further past the
point of resistance to turn o the receiver.

17 [L/R]

Pan control

18 3.5 mm jack socket (stereo) for the earphones

23 Fastenings of the battery compartment for 2 AA cells (LR6, 1.5 V) or appropriate

rechargeable batteries

24 Clip for attaching the transmitter to the guitar strap or on the body, for example on

the belt

25 Indicating the frequency range in which the device operates. The specication here

must match the specication printed on the back of the transmitter.

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Connections and controls

Display of the receiver

K Indicates the frequency that is assigned to the set combination of frequency group

and channel.

L [STEREO] / [MONO]

Indicates the set operating mode (stereo or mono).

M Radio signal strength indicator (one to four bars).

N Battery level indicator. Replace the batteries when only one bar remains displayed.

O [SQ]

Flashes while the squelch is being set.

P [IR]

Flashes while the infrared interface is being set.

Q [SCAN]

Flashes while the frequency is being adjusted.

R [FRQ]

Flashes while the frequency is being adjusted.

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UHF wireless system

S [CH]

Flashes while the channel is being adjusted.

T [GRP]

Flashes while the frequency group is being set.

U [AF]

Indicates the level of the incoming audio signal.

Connections and controls

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Operating

6 Operating

6.1 Setting up the transmitter

Selecting frequency group and
channel

36

Press [SET] to open the menu. Use button [+] and [–], and choose ‘GRP:01’ . The eld ‘GRP:01’ in
the bottom line of the display ashes. Conrm with [SET]. Use the keys [+] and [–] to select the
required group and press [SET] to conrm. Press [SET] again to conrm the setting and to set
the channel.

The eld ‘CH’ in the bottom line of the display ashes. Conrm with [SET]. Use the keys [+] and
[–] to select the required channel and press [SET] to conrm.

Use the [+] or [–] keys to increase or reduce the displayed value. When the desired value is
shown press [SET] to conrm the setting and exit the menu.

The display shows the used transmission frequency in MHz that is assigned to the set combina‐
tion of frequency group and channel.

UHF wireless system

Operating

Transmitter and receiver must be set to the same combination of frequency group
and channel. If you use multiple wireless systems from this device family, for best
results you should assign all systems to the same frequency group, but give each
system a dierent channel.

To set the frequency directly

Alternatively to selecting the frequency group and channel, you can also set the transmitter
frequency directly.

To set the frequency directly, press [SET] to open the menu. Use the [+] and [–] keys and select

‘FRQ’ . The eld ‘FRG’ in the bottom line of the display ashes. Conrm with [SET]. The rst
three numbers in the frequency display ash. Use the [+] or [–] keys to increase or reduce the
displayed value. When the desired value is displayed, press [SET]. The last three numbers in the
frequency display ash. Use the [+] or [–] keys to increase or reduce the displayed value. When
the desired value is shown press [SET] to conrm the setting and exit the menu.

The display shows the transmitter frequency set in MHz.

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Operating

Synchronising the frequency
with the receiver

Selecting the operating mode

Selecting the transmitter power

To synchronise the frequency via the infra-red interface with the receiver, open the battery
compartment cover on the receiver and place the [IR] symbol on the receiver near the [IR]
symbol on the transmitter.

Press [SET] to open the menu. Use the [+] and [–] keys and select ‘IR’ . The eld ‘IR’ in the
bottom line of the display ashes. Conrm with [SET]. The display shows ‘IR -- -- --’ . The fre‐
quency set on the transmitter is transferred to the receiver. This process can take up to ten sec‐
onds. After synchronising the frequency, the menu closes automatically.

The displays on the transmitter and receiver show the same transmission frequency in MHz.

Press [SET] to open the menu. Use the [+] and [–] keys and select ‘MODE’ . The eld ‘MODE’
ashes in the display. Conrm with [SET]. Use the [+] and [–] keys to switch between mono and
stereo mode. When the desired mode is shown press [SET] to conrm the setting and exit the
menu.

Press [SET] to open the menu. Use the [+] and [–] keys and select ‘RF’ . The eld ‘RF’ ashes in
the display. Conrm with [SET]. Use the [+] and [–] keys to select the required transmitter
power ‘10mW’ or ‘50mW’. When the desired value is shown press [SET] to conrm the setting
and exit the menu.

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38

6.2 Setting up the receiver

Operating

Selecting frequency group and
channel

Press [SET] to open the menu. Use the and keys and select ‘GRP’ . The eld ‘GRP’ in the
bottom line of the display ashes. Conrm with [SET]. The set group ashes in the display. Use
the and keys to select the required group and press [SET] to conrm the setting and to
move on to the channel setting.

The eld ‘CH’ in the bottom line of the display ashes. Conrm with [SET]. Use the and
keys to select the required channel and press [SET] to conrm.

The display shows the used transmission frequency in MHz that is assigned to the set combina‐
tion of frequency group and channel.

Transmitter and receiver must be set to the same combination of frequency group
and channel. If you use multiple wireless systems from this device family, for best
results you should assign all systems to the same frequency group, but give each
system a dierent channel.

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Operating

To set the frequency directly

Automatic frequency search

Alternatively to selecting the frequency group and channel, you can also set the transmitter
frequency directly.

To set the frequency directly, press [SET] to open the menu. Use the and keys and select

‘FRQ’ . The eld ‘FRG’ in the bottom line of the display ashes. Conrm with [SET]. The rst
three numbers in the frequency display ash. Use the and keys to increase or decrease the
indicated value. When the desired value is displayed, press [SET]. The last three numbers in the
frequency display ash. Use the and keys to increase or decrease the indicated value.
When the desired value is shown press [SET] to conrm the setting and exit the menu.

The display shows the transmitter frequency set in MHz.

To start an automatic frequency search, press [SET] to open the menu. Use the and keys
and select ‘SCAN’ . The eld ‘SCAN’ in the bottom line of the display ashes. Conrm with [SET].
The display shows ‘SC’ and the search begins. The lines next to ‘SC’ ash. The device's com‐
plete frequency range is scanned in 25 KHz increments. Once the search is complete, the value
is shown in the display. Press [SET] to conrm the setting and exit the menu.

The display shows the transmitter frequency set in MHz.

UHF wireless system

40

Operating

Selecting the operating mode

Switching on squelch

Press [SET] to open the menu. Use the and keys and select ‘STEREO’ on the right-hand side
of the display. Use the and keys to switch between mono and stereo mode. When the
desired mode is shown press [SET] to conrm the setting and exit the menu.

Press [SET] to open the menu. Use the and keys and select ‘SQ’ . The eld ‘SQ’ in the
bottom line of the display ashes. Conrm with [SET]. The display shows ‘SQ – – 95’ or another
preset value. The ‘dB’ eld on the right-hand side of the display lights up and the value ‘– 95’
or another preset value ashes.

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Technical specications

7 Technical specications

7.1 Transmitter

Input connections Voltage supply Plug-in power supply

Audio signal input 2 × XLR panel socket (balanced)

Output connections Earphones 3.5 mm mini phone socket (stereo)

1/4" phone socket (stereo)

Audio signal output 2 × 1/4" jack (mono)

Modulation type Frequency modulation (FM)

Frequency range the t.bone IEM 150 640 MHz (item no. 439536): 640 MHz…665 MHz

the t.bone IEM 150 823 MHz (item no. 439537): 823 MHz…832 MHz

the t.bone IEM 150 863 MHz (item no. 439539): 863 MHz…865 MHz

Transmission level 10 dBm

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UHF wireless system

Transmission power 10 mW…50 mW

Input impedance 20 kΩ

Input level –10 dBV…10 dBV

Gain range 0 dB…3 dB

Technical specications

NF frequency response

THD < 0.3 %

Dynamic range > 100 dB

Channel separation 35 dB

Signal-to-noise ratio > 80 dB (A-weighted)

Image frequency rejection 80 dB

Voltage supply

Dimensions (W × H × D,
without antenna)

Weight 1.0 kg

20 Hz…20 kHz (±3 dB)

Plug-in power supply 15 V / 450 mA

210 mm × 190 mm × 49 mm

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Technical specications

Ambient conditions Temperature range 0 °C…40 °C

Relative humidity 50 %, non-condensing

Further information

Switchable frequencies Yes

Mono/Stereo Mono, Stereo

Limiter Yes

Incl. earphones Yes

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UHF wireless system

Technical specications

7.2 Receiver

Output connections Earphones output 3.5 mm mini phone socket (stereo)

Modulation type Frequency modulation (FM)

Frequency range the t.bone IEM 150 R 640 MHz (item no. 439541): 640 MHz…665 MHz

the t.bone IEM 150 R 823 MHz (item no. 439542): 823 MHz…832 MHz

the t.bone IEM 150 R 863 MHz (item no. 439543): 863 MHz…865 MHz

Image frequency rejection > 50 dB

Sensitivity 114 dB/mW

Audio output level 60 mW

Operating supply voltage 2 AA cells (LR6, 1.5 V)

Dimensions (W × H × D, without antenna) 65 mm × 110 mm × 22 mm

Weight (without batteries) 150 g

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45

Technical specications

Ambient conditions Temperature range 0 °C…40 °C

Relative humidity 50 %, non-condensing

Further information

Incl. earphones Yes

46

UHF wireless system

8 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°.

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47

Plug and connection assignment

1/4" TS phone plug (mono,
unbalanced)

1/4" TRS phone plug (mono, bal‐
anced)

Since the interference aects 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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UHF wireless system

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)

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49

Troubleshooting

9 Troubleshooting

In the following we list a few common problems that may occur during operation. We give you
some suggestions for easy troubleshooting:

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UHF wireless system

Troubleshooting

Symptom Remedy

No sound 1. Check the power supply of transmitter and receiver.

2. Ensure that the transmitter and receiver are operating in the same frequency
range and that the transmitter antenna is designed for this frequency range.
The frequency range can be found on the devices.

3. Are the transmitter and receiver set to the same frequency group and
channel?

4. Test the connection between the transmitter and the connected audio device
(amplier, mixer). Is the connected audio device turned on and does the signal
level at the output of the audio device match to the input requirements of the
transmitter?

5. See if the sound transmission works when you move the receiver closer to the
transmitter.

Transmission is interrupted 1. Make sure that no metal objects near the transmitter or receiver obstruct the

transmission.

2. Modify the orientation of the antennas.

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51

Troubleshooting

Symptom Remedy

2. If you use more than one wireless system at the same time, check the used
frequency groups and channels.

3. Interference can also be caused by televisions, radios or mobile phones.

The sound is distorted. Change the [VOLUME] control settings on the transmitter.

If the procedures recommended above do not succeed, please contact our Service Center. You
can nd the contact information at www.thomann.de.

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UHF wireless system

10 Protecting the environment

Disposal of the packaging mate‐
rial

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 these materials with your normal household waste, but make sure that
they are fed to a recovery. Please follow the notes and markings on the packaging.

Disposal of batteries

Batteries must not be disposed of as domestic waste or thrown into re. Dispose of the bat‐
teries according to national or local regulations regarding hazardous waste. To protect the
environment, dispose of empty batteries at your retail store or at appropriate collection sites.

Protecting the environment

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53

Protecting the environment

Disposal of your old device

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 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.

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UHF wireless system

Musikhaus Thomann · Hans-Thomann-Straße 1 · 96138 Burgebrach · Germany · www.thomann.de