Page 1
CX 150BT
In-Ear Wireless
Model: SEBT2
Instruction manual
Use the search function, the navigation (left) or the following links:
Start
“Product overview”
“Getting started”
“Using the headphones”
“FAQ/If a problem occurs ...”
“Specifications”
Sennheiser electronic GmbH & Co. KG
Am Labor 1
30900 Wedemark
Germany
www.sennheiser.com
Version: 12/20 A02
Page 2
Important safety instructions
Important safety instructions
▷ Read this instruction manual carefully and completely before
using the product.
▷ Always include this instruction manual when passing the product
on to third parties.
▷ Do not use the product if it is obviously defective or makes loud,
unusual (whistling or beeping) noise.
▷ Only use the product in environments where Bluetooth wireless
transmission is permitted.
Preventing damage to health and accidents
▷ Protect your hearing from high volume levels. Permanent
hearing damage may occur when headphones are used
at high volume levels for long periods of time. Sennheiser
headphones sound exceptionally good at low and medium volume
levels.
▷ The product generates stronger permanent magnetic
fields that could cause interference with cardiac pace
makers, implanted defibrillators (ICDs) and other
implants. Always maintain a distance of at least 3.94"/10 cm
between the product component containing the magnet and the
cardiac pacemaker, implanted defibrillator, or other implant.
▷ Do not insert the earphones too deep into your ears and never
insert them without ear adapters. Always remove the earphones
slowly and carefully from your ears.
▷ Keep the product, accessories and packaging parts out of reach
of children and pets to prevent accidents. Swallowing and chok
ing hazard.
▷ Do not use the product in an environment that requires your spe-
cial attention (e.g. in traffic or when performing skilled jobs).
-
-
Preventing damage to the product and malfunctions
▷ Always keep the product dry and do not expose it to extreme tem-
peratures (hairdryer, heater, extended exposure to sunlight, etc.)
to avoid corrosion or deformation.
▷ Use only attachments/accessories/spare parts supplied or rec-
ommended by Sennheiser.
▷ Clean the product only with a soft, dry cloth.
Safety instructions for Lithium-Polymer rechargeable batteries
WARNING
If abused or misused, the rechargeable batteries may leak.
In extreme cases, they may even present a risk of:
•explosion,
• fire development,
• heat generation,
•smoke or gas development.
2 | CX 150BT
Page 3
Important safety instructions
Only use rechargeable batteries and chargers
recommended by Sennheiser.
Charge products with built-in rechargeable batteries at
ambient temperatures between 10 and 40°C/50 and
104°F.
Do not heat above 60 °C/140 °F, e.g. do not expose to
sunlight or throw into fire.
When not using the product for extended periods of
time, charge its built-in rechargeable battery regularly
(about every 3 months).
Switch rechargeable battery-powered products off after
use.
Dispose of defective products with built-in rechargeable
batteries at special collection points or return them to
your specialist dealer.
Notes on data collection and processing
This product stores individual settings such as the volume and the
Bluetooth addresses of paired devices. This data is required for the
operation of the product and is not transferred to Sennheiser or com
panies commissioned by Sennheiser and is not processed.
Intended use/Liability
These headphones have been designed as an accessory for Bluetooth compliant devices. They are intended for wireless audio communication such as music playback and phone calls via Bluetooth
wireless technology.
It is considered improper use when the product is used for any application not named in the corresponding product documentation.
Sennheiser does not accept liability for damage arising from misuse
or improper use of this product and its attachments/accessories.
Sennheiser is not liable for damages to USB devices that are not consistent with the USB specifications. Sennheiser is not liable for damages resulting from the loss of connection due to flat or overaged
rechargeable batteries or exceeding the Bluetooth transmission
range.
Before putting into operation, please observe the respective country-specific regulations.
-
CX 150BT | 3
Page 4
Package contents
Package contents
Earphones
USB charging cable with USB-C and
USB-A connector
Silicone ear adapter set in the following sizes:
XS, S, M (pre-mounted upon delivery) and L
Quick guide
Safety guide
Online you can find:
• this detailed instruction manual and additional information
(
www.sennheiser.com/download)
• the Sennheiser Smart Control app for getting to know the headphones (www.sennheiser.com/smartcontrol)
You can find a list of accessories on the CX 150BT product page
at
www.sennheiser.com.
Contact your local Sennheiser partner: www.sennheiser.com >
“Service & Support”.
4 | CX 150BT
Page 5
Product overview
*
ON
OFF
PAIRING
MUSIC
TELEPHONE
6
M
1
3
2
4
5
Right R
Left L
6
7
4
8
Product overview
Headphones
CX 150BT
Model: SEBT2
Earphones
LED
Volume + button (volume up)
Multi-function button
Volume - button (volume down)
USB-C socket for charging the rechargeable battery
Cover for USB-C socket
Microphone
CX 150BT | 5
Page 6
Product overview
Overview of the LED indications of the headphones
LED Meaning; the headphones
lights up red are being charged
lights up blue are fully charged
flashes blue are switched on
flashes red-blue
approx. 1 min
flashes blue Bluetooth pairing successful
flashes red Bluetooth pairing failed
flashes blue
pulses red
approx. 3 sec
flashes red
flashes red are switched off
If the LED does not light up immediately during charging, clean
the charging socket and charge the headphones until the LED
lights up again (
> 9).
are in Bluetooth pairing mode
are connected to a device via Bluetooth
are not connected to a device via
Bluetooth or the connection has
been lost
rechargeable battery is almost
empty
Notes on voice prompts
6 | CX 150BT
The headphones output voice prompts for the following functions.
Using the Smart Control app, you can change the language of the
voice prompts, choose between voice prompts and beep sounds, or
deactivate the status messages with a few exceptions (e.g.
rechargeable battery is empty).
Voice prompt Meaning/headphones
“Power on” are switched on
“Power off” are switched off
“Device (1) (2) connected” are connected to device 1 or 2
“Lost connection” are not connected via Bluetooth
“Pairing” are in Bluetooth pairing mode
Page 7
Product overview
Voice prompt Meaning/headphones
“Pairing successful” Bluetooth pairing successful
“Pairing failed” Bluetooth pairing failed
“Call rejected” incoming call rejected
“Call ended” call ended
“Mute on” Microphone is muted, active call is
put on hold
“Mute off” Microphone is reactivated
“Recharge headset” Rechargeable battery is empty.
Recharge the headphones.
“Volume min” volume set to minimum
“Volume max” volume set to maximum
CX 150BT | 7
Page 8
Getting started
USB-C USB-A
5s
Hold
ON
XS
S
M L
M
M
Getting started
1. Charging the rechargeable battery
The headphones' rechargeable battery is not fully charged upon
delivery. Before using the headphones for the first time, charge the
rechargeable battery for a complete charging cycle without interrup
tion (> 9).
2. Connecting the headphones to a Bluetooth
device
-
Connect the headphones to your smartphone via Bluetooth (> 10).
3. Selecting suitable ear adapters for optimum
fit of the headphones
The perceived sound quality and bass performance depends to a
large extent on the correct fit of the headphones in the ear.
▷ Test which ear adapter size gives you the best sound quality and
the best wearing comfort.
▷ You can choose between 4 different ear adapters in size XS, S, M
and L.
The ear adapters must fit snugly in the ear canal and completely seal
your ears (
> 12).
8 | CX 150BT
Page 9
Using the headphones
USB-A
USB-C
1,5 HRS
Using the headphones
Information on the rechargeable battery and the charging process
The headphones have a built-in rechargeable battery. A complete
charging cycle takes approx. 1.5 hours.
for the first time, charge the rechargeable battery for a complete
charging cycle without interruption.
When the headphones are being charged, the LED lights up (> 6).
When the battery charge drops to a critical level, a voice prompt asks
you to recharge the headphones (“Recharge headset”).
Sennheiser recommends using the supplied USB cable and a compatible standard USB power supply for charging the headphones.
Charging the headphones' rechargeable battery
Before using the headphones
1. Connect the USB-C connector of the USB cable to the USB-C socket
of the headphones.
2. Connect the USB-A connector to a corresponding socket of a USB
power source (to be ordered separately). Make sure that the USB
power source is connected to the power supply system.
The charging process of the headphones begins. The LED displays
the charge status:
LED Meaning
flashes red Rechargeable battery is being charged
(charge level is very low)
lights up red Rechargeable battery is being charged
(charge level approx. 50%)
lights up
purple
lights up blue Rechargeable battery is fully charged
Rechargeable battery is being charged
(charge level approx. 75%)
CX 150BT | 9
Page 10
Using the headphones
Connecting the headphones to a Bluetooth device
To be able to use the Bluetooth wireless connection, you must register both devices (headphones and e.g. smartphone) via the device
settings of your smartphone. This process is called pairing.
If operation differs from the steps mentioned, also refer to the
instruction manual of the Bluetooth device you are using.
If you switch on the headphones for the first time, they automatically switch to pairing mode.
Information on the Bluetooth wireless connection
The headphones are compatible with Bluetooth 5.0.
If your audio source supports AAC audio encoding, music is automatically played in high audio quality: Otherwise the headphones
will play your music in normal audio quality (SBC).
Paired devices establish the Bluetooth wireless connection immediately after switch-on and are ready for use.
On switch-on, the headphones automatically try to connect to the
last two connected Bluetooth devices. The headphones can save the
connection profiles of up to eight Bluetooth devices with which they
have been paired.
If you pair the headphones with the ninth Bluetooth device, the saved
connection profile of the least used Bluetooth device will be over
written. If you want to re-establish a connection with the overwritten
Bluetooth device, you have to pair the headphones again.
-
10 | CX 150BT
Paired and connected Bluetooth device
Paired Bluetooth device (currently not connected)
Page 11
Using the headphones
“Pairing“
1
2
3
4 5
< 20 cm
ON
“Device (1)
connected“
“Pairing
successful“
3x
3x
ON
3s
Hold
5s
Hold
Menu
Bluetooth on
Bluetooth off
Menu
Add Device
CX 150BT
Pairing the headphones with a Bluetooth device
1. Switch the headphones on (> 13) and place them close to the Blue-
tooth device (max. 20 cm).
2. Press and hold the multi-function button for 5 seconds until you
hear the voice prompt “Pairing”.
The LED flashes blue and red. The headphones are in pairing
mode.
3. Activate Bluetooth on your Bluetooth device.
4. Via the menu of your Bluetooth device, start the search for new Bluetooth devices.
All active Bluetooth devices in the proximity of your Bluetooth
device are displayed.
5. From the list of found Bluetooth devices, select “CX 150BT”. If necessary, enter the default pin code “0000”.
If pairing was successful, you hear the voice prompts “Pairing
successful” and “Device (1) connected”. The LED flashes blue
3
times.
If no connection is established within 5 minutes, pairing mode
is terminated and the headphones switch to idle mode. If nec
-
essary, repeat the steps described above.
Disconnecting the headphones from a Bluetooth device
▷ Via the menu of your Bluetooth device, disconnect the connection
to the headphones.
The headphones are disconnected from the Bluetooth device.
You hear the voice prompt “Lost connection”. The headphones
then search for other paired devices. If no device is found within
5 minutes, the headphones switch to idle mode.
CX 150BT | 11
Page 12
Using the headphones
“Sennheiser Smart Control”
XS S
M L
Installing the Smart Control app
The Smart Control app allows you to get to know your headphones
even better.
Download the app from the App Store or Google Play and install it on
your smartphone. Alternatively, you can use your smartphone to
scan the following QR code or to call up the following Internet site:
www.sennheiser.com/smartcontrol
▷ Connect your smartphone to the headphones via Bluetooth (> 10).
▷ Start the Smart Control app.
▷ Follow the instructions in the app.
Selecting suitable ear adapters for optimum fit of the headphones
The perceived sound quality and bass performance of the headphones depends to a large extent on their correct fit in the ear.
▷ Pull the ear adapter away from the in-ear sound tunnel.
▷ Mount the new ear adapter to the in-ear sound tunnel. Ensure that
it locks into place.
▷ Test which ear adapter size gives you the best sound quality and
the best wearing comfort.
You can choose between 4 different ear adapters in size XS, S, M and
L. The ear adapters must fit snugly in the ear canal and completely
seal your ears.
12 | CX 150BT
Page 13
Using the headphones
R
“Power on“
3x
3x
3s
Hold
ON
“Device (1)
connected“
Inserting the earphones into the ears
▷ Put the cable around your neck.
▷ Assign the right earphone to your right ear and the left earphone
to your left ear.
▷ Press the earphones lightly into the ear canal.
If the earphones fit too loose in the ear canal and fall out easily:
▷ Try larger ear adapters.
If you feel immediate pressure when wearing the earphones:
▷ Try smaller ear adapters.
Switching the headphones on
WARNING
Danger of hearing damage due to high volume levels!
Listening at high volume levels can lead to permanent
hearing defects.
▷ Before putting the headphones on, adjust the volume
to a low level (
▷ Do not continuously expose yourself to high volume
levels.
▷ Press the multi-function button for 3 seconds.
The headphones switch on. You hear the voice prompt “Power on”
and the LED display flashes blue 3 times.
If a paired Bluetooth device is within the transmission range, you
hear the voice prompt “Device (1) connected”. The LED flashes
blue 3 times.
> 15).
Make sure that Bluetooth is already activated on your Bluetooth device when switching on the headphones.
CX 150BT | 13
Page 14
Using the headphones
“Power off“
3x
3s
Hold
OFF
If Bluetooth is activated and the headphones cannot find a
paired Bluetooth device within a few minutes, you hear the
voice prompt “Lost connection”. The LED flashes red. The
headphones switch to standby mode.
Switching the headphones off
▷ Press the multi-function button for 3 seconds.
You hear the voice prompt “Power off” and the LED flashes red
3
times.
The headphones automatically switch to idle mode if no paired
Bluetooth device can be found within 5 minutes. You can wake
up the headphones from idle mode by pressing the multi-func
tion button for approx. 3 seconds.
Retrieving information on the battery charge status
When the headphones are connected to your Bluetooth device, the
battery charge status can be displayed on the screen of your smart
phone (depending on the device and operating system used).
You can check the battery charge level of your headphones manually
by pressing the volume -
“More than xx % battery left”.
Voice prompt Meaning
“Recharge headset” The rechargeable battery is empty.
“More than xx % battery
left”
button once. You hear the voice prompt
Recharge the rechargeable battery (
9).
In addition, the LED flashes red.
The remaining battery charge is
displayed as a percentage.
>
-
-
14 | CX 150BT
Page 15
Using the headphones
Adjusting the volume
WARNING
Danger of hearing damage due to high volume levels!
Listening at high volume levels can lead to permanent
hearing defects.
▷ Before putting the headphones on and before toggling
between audio sources, adjust the volume to a low
level.
▷ Do not continuously expose yourself to high volume
levels.
You can adjust the volume for music, voice prompts, and phone calls.
▷ If you are playing music or are on a call: Press the volume + or -
button to increase or reduce the volume.
When the maximum or minimum volume is reached, you hear the
voice prompt “Volume max” or “Volume min”.
You can also adjust the volume using the connected Bluetooth
device.
CX 150BT | 15
Page 16
Using the headphones
Controlling the music playback
The music playback functions are only available when the headphones and the device are connected via Bluetooth. Some smartphones or music players may not support all functions.
Playing/pausing music
▷ Press the multi-function button once.
Multi-function button Function
Press 1x Plays or pauses music
Playing the next track
▷ Quickly press the multi-function twice.
Multi-function button Function
Press 2x Plays the next track in the playlist
Playing the previous track
▷ Quickly press the multi-function three times.
Multi-function button Function
Press 3x Plays the previous track in the playlist
Making phone calls using the headphones
The call functions are only available when the headphones and the
smartphone are connected via Bluetooth. Some smartphones may
not support all functions.
The multi-function button allows you to control the call functions.
16 | CX 150BT
Making a call
▷ Dial the desired number on your smartphone.
If your smartphone does not automatically transfer the call to the
headphones, select “CX 150BT” as the audio source on your
smartphone (see the instruction manual of your smartphone if
necessary).
Page 17
Using the headphones
“Mute on“
“Mute off“
2s
Hold
Accepting/rejecting/ending a call
If your headphones are connected to a smartphone and you receive
a call, you hear a ring tone in the headphones.
If you are playing music when you receive a call, the music pauses
until you end the call.
Multi-function button Function
Press 1x
Press 1x
Accepts a call
Ends a call
Voice prompt “Call ended”
Hold for
2
sec
Rejects a call
Voice prompt “Call rejected”
Press 1x
Accepts an incoming call and ends
the active call
Press 2x
Puts the active call on hold and
accepts an incoming call
Press 2x
Toggles between active call and call
on hold
Muting the microphone
To mute the headphones' microphone during a call:
▷ Press the volume - button for 2 seconds.
The microphone is muted. You hear the voice prompt “Mute on”.
To continue the call and reactivate the microphone:
▷ Press the volume - button for 2 seconds.
The microphone is reactivated. You hear the voice prompt “Mute
off”.
CX 150BT | 17
Page 18
Care and maintenance
XS S
M L
Care and maintenance
CAUTION
Liquids can damage the electronics of the product!
Liquids entering the housing of the product can cause a short-circuit
and damage the electronics.
▷ Keep all liquids far away from the product.
▷ Do not use any solvents or cleansing agents.
▷ Clean the product only with a soft, dry cloth.
Replacing the ear adapters
For reasons of hygiene, you should replace your ear adapters from
time to time. Spare ear adapters are available from your Sennheiser
partner.
1. Pull the ear adapter away from the in-ear sound tunnel.
2. Mount the new ear adapter to the in-ear sound tunnel. Ensure that
it locks into place.
Information on the built-in rechargeable battery
Sennheiser ensures and guarantees that the rechargeable battery
performs at its optimum upon purchase of the product. If, upon pur
chase or within the warranty period, you suspect that the rechargeable battery is obviously defective or if a charging error/battery error
is displayed (>
power supply system and contact your Sennheiser partner. Your
Sennheiser partner will coordinate the repair/replacement with you.
Do not return a product with a defective battery to your dealer or
Sennheiser partner unless requested to do so. To find a Sennheiser
partner in your country, search at
support.
6), stop using the product, disconnect it from the
www.sennheiser.com/service-
-
18 | CX 150BT
Page 19
FAQ/If a problem occurs ...
FAQ/If a problem occurs ...
Current list of frequently asked questions (FAQ)
Visit the CX 150BT product page at
www.sennheiser.com/download
There you will find a current list of frequently asked questions (FAQ)
and suggested solutions.
Your question has not been answered or the problem persists?
If a problem occurs that is not listed in the FAQ section or if the problem cannot be solved with the proposed solutions, please contact
your Sennheiser partner for assistance.
To find a Sennheiser partner in your country, search at
www.sennheiser.com > “Service & Support”.
Leaving the Bluetooth transmission range
Wireless calling and streaming are only possible in the Bluetooth
transmission range of your smartphone. The transmission range
largely depends on environmental conditions such as wall thickness,
wall composition etc. With a free line of sight, the transmission
range of most smartphones and Bluetooth devices is up to 10 meters.
If you, and therefore the headphones, leave the Bluetooth transmission range of the smartphone, the sound quality deteriorates
increasingly until you hear the voice prompt “Lost connection” and
the connection breaks down completely. If you immediately re-enter
the Bluetooth transmission range, the connection is automatically
re-established.
Deleting the Bluetooth pairing list of the headphones
1. Switch the headphones on (> 13).
2. Press and hold the multi-function button for 3 seconds.
The headphones are in Bluetooth pairing mode. The LED flashes
blue and red.
3. Press and hold the volume + button for approx. 3 seconds.
The Bluetooth pairing list is deleted. You hear the voice prompt
“Pairing list cleared”. The LED flashes blue and red three times.
The headphones then stay in Bluetooth pairing mode.
CX 150BT | 19
Page 20
Specifications
Specifications
CX 150BT
Model: SEBT2
Wearing style Bluetooth® neckband cable
Ear coupling ear-canal
Frequency response 20 Hz to 20,000 Hz
Transducer principle dynamic
Transducer size 9.7 mm
Sound pressure level (SPL)
THD (1 kHz, 100 dB) < 0.5% (1 kHz, 100 dB SPL)
Microphone principle MEMS
Microphone frequency
response
Microphone sensitivity
(as per ITU-T P.79)
Microphone pick-up pattern
(speech audio)
Power supply built-in rechargeable lithium-polymer
Operating time 10 hrs (music playback via SBC) with
Charging time of
rechargeable batteries
Temperature range operation: +5 °C to +40 °C ± 5 °C
Relative humidity operation: 10 to 80%, non condensing
Magnetic field strength 1.2 mT
Weight approx. 14 g
107 ±3 dB (1 kHz/0 dBFS)
measured according to IEC711
100 Hz to 8,000 Hz
-42 dB V/Pa
omni-directional
battery: 3.7 V
USB charging: 5 V ⎓, 100 mA max.
headphones' rechargeable battery;
340 hrs in standby mode
approx. 1.5 hrs
charging: +10 °C to +40 °C
storage: –20 °C to +70 °C
storage: 10% to 90%
⎓, 100 mAh;
20 | CX 150BT
Bluetooth
Version Bluetooth 5.0 compatible, class 1, BLE
Transmission frequency 2,402 MHz to 2,480 MHz
Modulation GFSK, π/4 DQPSK, 8DPSK
Profiles HSP, HFP, AVRCP, A2DP
Output power 10 mW (max)
Codec SBC, AAC
Page 21
Manufacturer Declarations
Manufacturer Declarations
Warranty
Sennheiser electronic GmbH & Co. KG gives a warranty of 24 months
on this product.
For the current warranty conditions, please visit our website at
www.sennheiser.com or contact your Sennheiser partner.
In compliance with the following requirements
• General Product Safety Directive (2001/95/EC)
•Compliant to Sound Pressure Limits according to country specific requirements
EU declaration of conformity
• RoHS Directive (2011/65/EU)
Hereby, Sennheiser electronic GmbH & Co. KG declares that the
radio equipment type SEBT2 is in compliance with the Radio Equip
ment Directive (2014/53/EU).
The full text of the EU declaration of conformity is available at the following Internet address: www.sennheiser.com/download.
-
Notes on disposal
• Battery Directive (2006/66/EC & 2013/56/EU)
• WEEE Directive (2012/19/EU)
The symbol of the crossed-out wheeled bin on the product, the battery/rechargeable battery (if applicable) and/or the packaging indicates that these products must not be disposed of with normal
household waste, but must be disposed of separately at the end of
their operational lifetime. For packaging disposal, please observe the
legal regulations on waste segregation applicable in your country.
Further information on the recycling of theses products can be
obtained from your municipal administration, from the municipal col
lection points, or from your Sennheiser partner.
The separate collection of waste electrical and electronic equipment, batteries/rechargeable batteries (if applicable) and packagings is used to promote the reuse and recycling and to prevent negative effects caused by e.g. potentially hazardous substances
contained in these products. Herewith you make an important con
tribution to the protection of the environment and public health.
Trademarks
Sennheiser is a registered trade mark of
Sennheiser
Apple, the Apple logo and Siri are trademarks of Apple Inc., registered in the U.S. and other countries. App Store is a service mark of
Apple Inc. Android and Google play are registered trademarks of
Google Inc. The Bluetooth® word mark and logos are registered
trademarks owned by Bluetooth SIG, Inc. and any use of such marks
by Sennheiser electronic GmbH & Co. KG is under license.
Other product and company names mentioned in the user documentation may be the trademarks or registered trademarks of their
respective holders.
electronic GmbH & Co. KG.
-
-
CX 150BT | 21
Loading...