Page 1
IEM 150
UHF wireless system
user manual
Page 2
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
19.10.2018, ID: 439536, 439537, 439539, 439541, 439542, 439543
Page 3
Table of contents
Table of contents
1 General notes............................................................................................................................................... 5
2 Safety instructions..................................................................................................................................... 7
3 Features and scope of delivery......................................................................................................... 12
4 Installation.................................................................................................................................................. 16
4.1 General Information........................................................................................................................ 16
4.2 Transmitter......................................................................................................................................... 17
4.3 Receiver............................................................................................................................................... 19
4.4 Taking system in operation.......................................................................................................... 20
5 Connections and controls................................................................................................................... 21
5.1 Transmitter......................................................................................................................................... 21
5.2 Receiver............................................................................................................................................... 27
6 Operating.................................................................................................................................................... 33
6.1 Setting up the transmitter............................................................................................................ 33
6.2 Setting up the receiver................................................................................................................... 36
IEM 150
3
Page 4
Table of contents
7 Technical specications....................................................................................................................... 39
7.1 Transmitter......................................................................................................................................... 39
7.2 Receiver............................................................................................................................................... 41
8 Plug and connection assignment.................................................................................................... 42
9 Troubleshooting...................................................................................................................................... 45
10 Protecting the environment.............................................................................................................. 48
UHF wireless system
4
Page 5
1 General notes
General notes
This user manual contains important information on 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, include the manual for
the next owner.
Our products are subject to a process of continuous development. We therefore reserve the
right to make changes without notice.
This section provides an overview of the symbols and signal words used in this user manual.Symbols and signal words
IEM 150
5
Page 6
General notes
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.
UHF wireless system
6
Page 7
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 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.
IEM 150
7
Page 8
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.
UHF wireless system
8
Page 9
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.
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.
IEM 150
9
Page 10
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.
10
UHF wireless system
Page 11
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.
IEM 150
11
Page 12
Features and scope of delivery
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.
12
UHF wireless system
Page 13
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
IEM 150
13
Page 14
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
UHF wireless system
14
Page 15
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
IEM 150
15
Page 16
Installation
4 Installation
4.1 General Information
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.
16
UHF wireless system
Page 17
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.
IEM 150
17
Page 18
Installation
Connecting audio and starting
up
Connect the audio inputs of the transmitter with suitable line outputs of your mixer or your
amplier. 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.
UHF wireless system
18
Page 19
4.3 Receiver
Inserting batteries into the
receiver
Installation
Ensure that the main switch / volume control (16) on the receiver is in the "OFF" position.
IEM 150
19
Page 20
Installation
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
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
amplier.
20
UHF wireless system
Page 21
5 Connections and controls
5.1 Transmitter
Front panel of transmitter
Connections and controls
IEM 150
21
Page 22
Connections and controls
1 [POWER]
Main switch. Turns the device on and o. Press this button for about 1 second to switch the device on.
2 Display.
3, 5 [+] / [–]
Buttons for increasing / decreasing the currently indicated value.
4 [SET]
Enter button for menu control
6 [VOLUME]
Volume control
7 [MONITOR]
Volume control for headphone output
8 3.5 mm phone socket (stereo) to connect headphones
9 6.35 mm phone socket (stereo) to connect headphones
22
UHF wireless system
Page 23
Rear panel of transmitter
Connections and controls
IEM 150
23
Page 24
Connections and controls
10 Connector for the supplied power supply adapter
11 [LOOP OUT CH1, CH2]
6.35 mm phone sockets (mono). Outputs for forwarding the audio signal to other in-ear transmitters or monitor
boxes.
12 [LEFT CH.1 IN] / [RIGHT CH.2 IN]
XLR jack (left and right channel) for direct connection to a mixing console 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
24
UHF wireless system
Page 25
Transmitter display
Connections and controls
A Indicates the frequency that is assigned to the set combination of frequency group
and channel.
B [10mW] / [50mW]
Indicates the set transmitter power.
C [STEREO] / [MONO]
Indicates the set operating mode (stereo or mono).
D [RF]
Flashes if the transmitter power is being adjusted.
E [MODE]
Flashes if the operating mode is being adjusted.
F [FRQ]
Flashes if the frequency is being adjusted.
G [CH]
Flashes if the channel is being adjusted.
IEM 150
25
Page 26
Connections and controls
H [GRP]
Flashes if the frequency group is being adjusted.
I [RLF]
Level display for the left channel.
J [ARF]
Level display for the right channel.
26
UHF wireless system
Page 27
5.2 Receiver
Front panel of the receiver
Connections and controls
15 Flexible antenna.
16 [– / +]
Main switch and volume control. Turn this control clockwise past the point of resist‐
ance to turn on the receiver. Turn it further to increase the volume.
Turn this control 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 phone socket (stereo) for the ear phones
19 Display
20 [SET]
Enter button for menu control
IEM 150
27
Page 28
Connections and controls
21, 22 [+] / [–]
Buttons for increasing / decreasing the currently indicated value.
23 Battery compartment closures for two AA cells (LR6), 1.5 V or comparable recharge‐
able batteries.
28
UHF wireless system
Page 29
Top panel of the receiver
Connections and controls
15 Flexible antenna.
16 [OFF/ON/VOL]
Main switch and volume control. Turn this control clockwise past the point of resist‐
ance to turn on the receiver. Turn it further to increase the volume.
Turn this control 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 phone socket (stereo) for the ear phones.
24 Clip for fastening the transmitter to the guitar strap or to the body, for example on
the belt.
IEM 150
29
Page 30
Connections and controls
Rear panel of the receiver
15 Flexible antenna
16 [OFF/ON/VOL]
Main switch and volume control. Turn this control clockwise past the point of resist‐
ance to turn on the receiver. Turn it further to increase the volume.
Turn this control 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 phone socket (stereo) for the ear phones
23 Battery compartment closures for two AA cells (LR6), 1.5 V or comparable recharge‐
able batteries
24 Clip for fastening the transmitter to the guitar strap or to the body, for example on
the belt
25 Indication of the frequency range in which the device operates. The specication
here must match the specication printed on the back of the transmitter.
30
UHF wireless system
Page 31
Display of the receiver
Connections and controls
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 if the squelch is being adjusted.
P [IR]
Flashes if the infra-red interface is being adjusted.
Q [SCAN]
Flashes if the frequency is being adjusted.
R [FRQ]
Flashes if the frequency is being adjusted.
IEM 150
31
Page 32
Connections and controls
S [CH]
Flashes if the channel is being adjusted.
T [GRP]
Flashes if the frequency group is being adjusted.
U [AF]
Indicates the incoming audio signal level.
32
UHF wireless system
Page 33
6 Operating
6.1 Setting up the transmitter
Operating
Selecting frequency group and
channel
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. Conrm with [SET]. Use the keys [+] and [–] to select the
required group and press [SET] to conrm. Press [SET] again to conrm the setting and to set
the channel.
The eld ‘CH’ in the bottom line of the display ashes. Conrm with [SET]. Use the keys [+] and
[–] to select the required channel and press [SET] to conrm.
Use the [+] or [–] keys to increase or reduce the displayed value. When the desired value is
shown press [SET] to conrm 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.
IEM 150
33
Page 34
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 dierent channel.
To set the frequency directly
34
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. Conrm 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 conrm the setting and exit the menu.
The display shows the transmitter frequency set in MHz.
UHF wireless system
Page 35
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. Conrm 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. Conrm with [SET]. Use the [+] and [–] keys to switch between mono and
stereo mode. When the desired mode is shown press [SET] to conrm 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. Conrm with [SET]. Use the [+] and [–] keys to select the required transmitter
power ‘10mW’ or ‘50mW’. When the desired value is shown press [SET] to conrm the setting
and exit the menu.
IEM 150
35
Page 36
Operating
6.2 Setting up the receiver
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. Conrm with [SET]. The set group ashes in the display. Use
the and keys to select the required group and press [SET] to conrm the setting and to
move on to the channel setting.
The eld ‘CH’ in the bottom line of the display ashes. Conrm with [SET]. Use the and
keys to select the required channel and press [SET] to conrm.
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 dierent channel.
UHF wireless system
36
Page 37
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. Conrm 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 conrm 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. Conrm 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 conrm the setting and exit the menu.
The display shows the transmitter frequency set in MHz.
IEM 150
37
Page 38
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 conrm 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. Conrm 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.
UHF wireless system
38
Page 39
Technical specications
7 Technical specications
7.1 Transmitter
Input 2 × XLR socket (symmetrical)
Headphone output 3.5 mm and 6.35 mm phone sockets (stereo)
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
Transmitter level 10 dBm
Transmission power 10 mW…50 mW
Input impedance 20 kΩ
Input level –10 dBV…10 dBV
IEM 150
39
Page 40
Technical specications
Gain range 0 dB…3 dB
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) 210 mm × 190 mm × 49 mm
Weight 1.0 kg
20 Hz…20 kHz (±3 dB)
Power adapter 15 V / 500 mA
UHF wireless system
40
Page 41
Technical specications
7.2 Receiver
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
IEM 150
41
Page 42
Plug and connection assignment
8 Plug and connection assignment
Introduction
Balanced and unbalanced trans‐
mission
42
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°.
UHF wireless system
Page 43
1/4" TS phone plug (mono,
unbalanced)
1/4" TRS phone plug (mono, bal‐
anced)
Plug and connection assignment
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
IEM 150
43
Page 44
Plug and connection assignment
Three-pole 1/8" mini phone jack
(stereo, unbalanced)
XLR plug (balanced)
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)
44
UHF wireless system
Page 45
9 Troubleshooting
Troubleshooting
In the following we list a few common problems that may occur during operation. We give you
some suggestions for easy troubleshooting:
IEM 150
45
Page 46
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
(amplier, 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.
46
UHF wireless system
Page 47
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.
Troubleshooting
IEM 150
47
Page 48
Protecting the environment
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.
48
UHF wireless system
Page 49
Disposal of your old device
Protecting the environment
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.
IEM 150
49
Page 50
Notes
50
UHF wireless system
Page 51
Page 52
Musikhaus Thomann · Hans-Thomann-Straße 1 · 96138 Burgebrach · Germany · www.thomann.de
Loading...