Sennheiser CX True Wireless Earbuds Instruction Manual

Sennheiser CX True Wireless Earbuds

About Sennheiser

Sennheiser is a well-known and respected audio company that specializes in the design and production of a wide range of audio products, including headphones, microphones, wireless systems, and professional audio solutions. The company was founded in 1945 by Fritz Sennheiser and is headquartered in Wedemark, Germany.

Sennheiser has a strong reputation for producing high-quality audio equipment that caters to both consumer and professional markets. Their headphones are particularly renowned for their sound quality, durability, and comfort. Sennheiser offers a diverse range of headphone models, including over-ear, on-ear, and in-ear headphones, catering to various preferences and use cases.

Getting started

Waking up the earbuds and the charging case and charging the rechargeable batteries

Upon delivery, the rechargeable batteries of the earbuds and the charging case are in sleep mode and have to be woken up by connecting them to a power source once.

• Insert the earbuds into the charging case.
• Connect the USB-C cable to the charging case and to a USB power source (> 14).

The earbuds and the charging case are woken up and the rechargeable batteries are being charged. The earbuds are now ready for use.

Selecting suitable ear adapters for the optimum fit of the earbuds

The perceived sound quality including bass performance and the best possible noise cancellation depend to a large extent on the correct fit of the earbuds 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 sizes XS, S, M, and L (> 20).

• Assign the right earbud to your right ear and the left earbud to your left ear.
• Insert the earbuds at a slight angle into the ears and twist them slightly into the ear canal so that they sit comfortably and snugly in the ear canal.

Connecting the earbuds to a Bluetooth device

Connect the earbuds to your smartphone via Bluetooth (> 16).

Installing the Smart Control app on your smartphone

The Sennheiser Smart Control app allows you to use all functions and settings of the earbuds and e.g. adjust the sound to your liking using the equalizer (> 19).

Using the earbuds

Information on the rechargeable battery, the charging process, and the first use

The earbuds and the charging case each have a built-in rechargeable battery. The charging case allows you to store the earbuds safely at all times while they are being charged.

Upon delivery, the rechargeable batteries of the earbuds and the charging case are in sleep mode and have to be woken up by connecting them to a power source once. Sennheiser recommends charging the earbuds and the charging case for a complete charging cycle without interruption before using them for the first time.

A complete charging cycle of the charging case and the earbuds takes about 1.5 hours. The quick charge function gives you approx. 1 hour of playback time after 10 minutes of charging.

Sennheiser recommends using the supplied USB cable and a compatible standard USB power supply for charging the headphones.

When a USB cable connected to a power source is also connected to the charging case, the rechargeable battery of the charging case is charged. When the earbuds are inserted into the charging case, their rechargeable batteries are being charged at the same time. The LED of the charging case displays the charge status (> 8). When the battery charge of the earbuds drops to a critical level, a voice prompt asks you to recharge the earbuds (“Recharge headset”).

The charge status of the rechargeable battery of the charging case is displayed by the LED on the charging case (> 8).

Charging the rechargeable battery of the earbuds and the charging case

1. Open the charging case by overcoming a slight magnetic resistance and insert the left earbud into the left charging compartment and the right earbud into the right charging compartment. The earbuds are magnetically pulled into the charging compartments.
2. Connect the USB-C connector of the USB cable to the USB-C socket of the charging case.
3. 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 rechargeable batteries of the earbuds and the charging case are being charged.

If no earbuds are inserted into the charging case, only the rechargeable battery of the charging case is being charged. The LED of the charging case displays the charge status:

If the LED does not light up:

• Clean the contacts on the earbuds and in the charging case (> 30).
• Charge the rechargeable batteries of the earbuds and the charging case (at least 30 minutes) until the LED lights up again.

Connecting the earbuds to a Bluetooth device

To be able to use the Bluetooth wireless connection, you must register both devices (earbuds and e.g. smartphone) via the device settings of your smartphone. This process is called pairing. If the operation differs from the steps mentioned, also refer to the instruction manual of the Bluetooth device you are using.

When you switch on the earbuds for the first time after initial charging, they automatically switch to Bluetooth pairing mode.

Information on the Bluetooth wireless connection

The earbuds are compatible with Bluetooth 5.2.

If your audio source supports one of the following high-resolution audio encoding methods, music is automatically played in high audio quality: aptX® or AAC. 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.

When you switch the earbuds on, they automatically try to connect to the last connected Bluetooth device. The earbuds can save the connection profiles of up to eight Bluetooth devices with which they have been paired. Audio playback is only possible from one device at a time.

If you pair the earbuds 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 earbuds again. Using the Smart Control app, you can view the list of paired devices and selectively connect and disconnect devices (“Connections”; > 17).

• Paired and connected Bluetooth device
• Paired Bluetooth device (currently not connected)

The right and the left earbuds also use a Bluetooth wireless connection. Both earbuds are paired with each other upon delivery. If you are using a different earbud (e.g. a spare earbud), the two earbuds must also be paired with each other (> 17).

Pairing the earbuds with a Bluetooth device

1. Take both earbuds out of the charging case and insert them into your ears (> 20). The distance between the earbuds and the Bluetooth device should not exceed 40″/1 m.
2. Simultaneously touch and hold the right and the left touch control panel for 3 seconds until you hear the voice prompt “Pairing” and a beep. The LEDs of the earbuds flash blue and red. The earbuds 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 smartphone are displayed.

From the list of found Bluetooth devices, select “CX True Wireless”. If necessary, enter the default pin code “0000”. If the pairing is successful, you hear the voice prompt “Pairing successful” and the LEDs of the earbuds flash blue 3x.

If no connection is established within 1 minute, pairing mode is terminated and the earbuds switch to idle mode. If necessary, repeat the steps described above.

If the earbuds are not paired with any Bluetooth device (the pairing list is empty), the pairing mode is permanently active.

Switching the connection to paired Bluetooth devices/”Connections”

To selectively switch the audio connection to paired Bluetooth devices using the “Connections” function, you require the Smart Control app (> 19).

• In the Smart Control app, tap “Connections”.
• The list of Bluetooth devices paired with the earbuds appears.
• From the list, select the paired device to which you want to connect the earbuds. Make sure that the desired device is switched on and Bluetooth is activated.

The Bluetooth audio connection between the desired Bluetooth device and the earbuds is established.

The app connection between the device with the Smart Control app installed and the earbuds remains active with only Bluetooth Low Energy for communication between the app and earbuds, the device name is highlighted in bold).

Disconnecting the earbuds from a Bluetooth device

• Via the menu of your Bluetooth device, disconnect the connection to the earbuds.

The earbuds are disconnected from the Bluetooth device. The earbuds then search for other paired devices. If no device is found, you hear the voice prompt “No connection”. The headphones switch to idle mode.

Using the “Connections” function in the Smart Control app, you can also selectively connect the earbuds to paired devices without terminating an existing connection (> 32).

If you want to clear the Bluetooth pairing list of the earbuds, reset the earbuds to the factory default settings (> 32).

Pairing the earbuds with each other (optional) /restoring the factory default settings

The right and the left earbuds are paired with each other upon delivery. If, however, you are using a different earbud (e.g. a spare earbud), you have to pair the two earbuds with each other once. This pairing process resets the earbuds to the factory default settings.

• Make sure that the earbuds are not connected to any Bluetooth device. Deactivate Bluetooth on your Bluetooth device or delete “CX True Wireless” from the list of paired devices in the Bluetooth menu of your Bluetooth device.
• Charge the right and the left earbud (> 14).
• Take one earbud out of the charging case. The LED of the earbud lights up red.
• Press and hold the touch control panel for 10 seconds until you hear the voice prompt “Pairing” and a beep sound. The LED of the earbud flashes green and red. The earbud is in earbud pairing mode.
• Now take the second earbud out of the charging case and make sure that the right and the left earbuds are close together (max. distance 50 cm).
• Press and hold the touch control panel of the second earbud for 10 seconds until you hear the voice prompt “Pairing” and a beep sound.

If the pairing is successful, you hear the voice prompt “Pairing successful” and the LEDs of the earbuds flash blue 3x. The earbuds are paired with each other and the factory default settings are restored.

• Now pair the earbuds with your Bluetooth device (> 16).

Installing the Smart Control app

To make full use of all the settings and functions of the headphones, you need to have the free Sennheiser Smart Control app installed on your smartphone.

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 earbuds using Bluetooth (> 15).
• Start the Smart Control app.
• Follow the instructions in the app.
• Simultaneously touch and hold the right and the left touch control panel for 3 seconds to accept the Bluetooth low-energy connection.

The Smart Control app recognizes the earbuds and activates all available settings and functions.

Selecting suitable ear adapters for the optimum fit of the earbuds

The perceived sound quality including bass performance and the best possible noise cancellation depend to a large extent on the correct fit of the earbuds 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 sizes XS, S, M, and L. The ear adapters must fit snugly in the ear canal and com- pletely seal your ears.

Inserting the earbuds into the ears

• Assign the right earbud to your right ear and the left earbud to your left ear.
• Insert the earbuds at a slight angle into the ears and twist them slightly into the ear canal so that they sit comfortably and snugly in the ear canal (> 20).

You can use the right or left earbud alone. If you insert one earbud into the charging case during use, a short interruption of playback may occur in the other earbud.

Switching the earbuds on

WARNING

The 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 (> 22).
• Do not continuously expose yourself to high volume levels.

Take both earbuds out of the charging case and insert them into your ears (> 20).

If a paired Bluetooth device is within the transmission range, you hear the voice prompts “Power On” and “Connected”. The LEDs of the earbuds light up blue.

If you take the earbuds out of the charging case during an incoming call, the call is automatically accepted and you can use the earbuds directly for making calls. This Auto Call function can also be deactivated (> 26).

The earbuds automatically switch to idle mode if no paired Bluetooth device can be found within 15 minutes. You can wake up the earbuds from idle mode by touching their touch control panels 1x or by briefly inserting them into the charging case.

The charging case automatically switches to a power-saving mode if the lid is open for more than 5 minutes. In power saving mode, inserted earbuds are not recognized or switched on/off when removed/inserted.

Close the lid of the charging case and open it again to end the power-saving mode.

Switching the earbuds off

The earbuds do not have to be switched off explicitly.

• Insert the earbuds into the charging case to switch them off. As soon as the earbuds are inserted into the charging case, they switch off and are being charged (> 14).

You can also switch off the earbuds manually (idle mode) via the Smart Control app.

The earbuds automatically switch to idle mode if no paired Bluetooth device can be found within 15 minutes. You can wake up the earbuds from idle mode by touching their touch control panels 1x or by briefly inserting them into the charging case.

The charging case automatically switches to a power-saving mode if the lid is open for more than 5 minutes. In power saving mode, inserted earbuds are not recognized or switched on/off when removed and inserted.

Close the lid of the charging case and open it again to end the power-saving mode.

Adjusting the volume

WARNING

The 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.

To increase the volume:

• Touch and hold the touch control panel of the right earbud until the volume is increased.

To reduce the volume:

• Touch and hold the touch control panel of the left earbud until the volume is reduced.

When the maximum or minimum volume is reached, you hear a beep.

You can also adjust the volume using the connected Bluetooth device.

Using the voice assistant/voice dialing

• Tap the touch control panel of the right or left earbud 3x. The available voice assistant of your smartphone is activated (*depending on the system or app on your smartphone: Siri, Google Assistant, …).
• Ask the voice assistant your question or make a request.

To cancel the voice assistant/voice dialing:

• Tap the touch control panel of the right or left earbud 3x.

Controlling music playback

The music playback functions are only available when the earbuds and the device are connected via Bluetooth. Some smartphones or music players may not support all functions.

Playing/pausing music

• Tap the touch control panel of the right or left earbud 1x.

Playing the previous track

• Tap the touch control panel of the left earbud 2x.

Playing the next track

• Tap the touch control panel of the right earbud 2x.

Making calls using the earbuds

The call functions are only available when the earbuds and the smartphone are connected via Bluetooth.

Some smartphones and telephony apps (e.g. WhatsApp, Skype, WeChat) may not support all call control functions.

During a call, you can use the right and/or left earbuds to control the call functions.

Making a call

• Dial the desired number on your smartphone.

If your smartphone does not automatically transfer the call to the headphones, select “CX True Wireless” as the audio source on your smartphone (see the instruction manual of your smartphone if necessary).

Accepting/rejecting/ending a call

If your headphones are connected to a smartphone and you receive a call, you hear a ringtone in the headphones.

If you are playing music when you receive a call, the music pauses until you end the call.

Using the Auto Call function

If you take the paired earbuds out of the charging case during an incoming call, the call is automatically accepted and you can use the earbuds directly for making calls.

You can activate (default setting) or deactivate the function via the Smart Control app. Note that both earbuds must be switched on to adjust the settings for both earbuds (right and left).

You can use the right or left earbud alone. If you insert one earbud into the charging case during use, a short interruption of playback may occur in the other earbud.

Using the Sidetone function

When using the earphones for phone calls, you may find it more comfortable if your own voice is audible in the earphones. With the Sidetone function activated, your own voice is played back through the earphones during a phone call.

You can activate the function (default setting) and adjust settings or deactivate the function via the Smart Control app. Note that both earbuds must be switched on to adjust the settings for both earbuds (right and left).

Displaying the battery charge status

When the earbuds are connected to your Bluetooth device, the battery charge status can be displayed on the screen of your smartphone or device (depending on the device and operating system used).

The Smart Control app also displays the charge status of the ear- buds’ rechargeable batteries.

Displaying the battery charge status using the charging case

If no USB cable is connected to the charging case:

• Open the lid of the charging case.

The LED of the charging case displays the battery charge status. If you close the lid of the charging case, the LED will go off after approx. 30 seconds.

Adjusting sound effects/the equalizer

To be able to use the sound effects/equalizer, you require the Smart Control app (> 19).

• In the Smart Control app, select the desired sound effects via the equalizer. You can use predefined presets or define your own settings.

The sound effects are stored in the earbuds. These sound settings are active even without using the Smart Control app, i.e. when you are using a different Bluetooth device. Note that both earbuds must be switched on to adjust the settings for both earbuds (right and left).

Setting the voice prompts/ beep sounds

To be able to set the voice prompts and beep sounds, you require the Smart Control app (> 19).

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). Note that both earbuds must be switched on to adjust the settings for both earbuds (right and left).

Storing or transporting the earbuds in the charging case

Store the earbuds in the charging case to prevent damage to the earbuds when you are not using them or transporting them. The earbuds are automatically charged in the charging case so you always have the full battery life to work with. _

• Open the lid of the charging case by overcoming a slight magnetic resistance and insert the left earbud into the left charging compartment and the right earbud into the right charging compartment.

The earbuds are magnetically pulled into the charging compartments.

• Close the lid of the charging case.

Care and maintenance of the earbuds/charging case

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.
• Only clean the charging case with a soft, dry cloth. Clean the earbuds with a slightly damp cloth.
• You can clean the silicone ear adapters under lukewarm running water. Let the ear adapters air dry at room temperature for at least 12 hours before re-attaching them to the earbuds.
• Clean the charging contacts on the earbuds and in the charging case from time to time using e.g. a cotton swab.

If the earbuds have gotten wet:

• Remove the ear adapters and dry the earbuds and ear adapters with a dry cloth. If necessary, leave the earbuds and ear adapters dry at room temperature for approx. 12 hours.

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 batteries perform at their optimum upon purchase of the product. If, upon purchase or within the warranty period, you suspect that a rechargeable battery is obviously defective or if a charging error/battery error is displayed (> 8), stop using the product, disconnect it from the 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 www.sennheiser.com/service-support.

Installing firmware updates

Firmware updates can be downloaded free of charge from the Internet using the Sennheiser Smart Control app.

• Connect your earbuds to your smartphone and start the Smart Control app (> 19).
• The app provides information on available firmware updates and guides you through the installation process.
• Make sure that the batteries are fully charged before updating (> 14). Avoid connecting or disconnecting the USB power supply during the update process.
• The earbuds must be in the charging case and must not be removed during the update process. Close the lid of the charging case.

FAQ/If a problem occurs …

Current list of frequently asked questions (FAQ)

Visit the CX True Wireless product page at www.sennheiser.com There vou 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 earbuds, leave the Bluetooth transmission range of the smartphone, the sound quality deteriorates increasingly until you hear the voice prompt “No connection” and the connection breaks down completely. If you immediately re-enter the Bluetooth transmission range, the connection is automatically re-established and you hear the voice prompt “Connected”. If this is not the case, tap the touch control panel of the earbud 1x.

Resetting the earbuds

If the function of the earbuds is disturbed, perform a reset. Individual settings such as the pairing settings are not deleted.

Insert both earbuds into the charging case, close the lid of the charging case, and wait at least 10 seconds before taking the earbuds out of the charging case and switching them on again.

Resetting the earbuds to the factory default settings

If the function ofthe earbuds is disturbed and a reset (> 32) does not improve, reset the earbuds to the factory default settings. This deletes, among other things, all pairing settings (> 17).

You can also reset the earbuds to the factory default settings using the Smart Control app.

Specifications

CX True Wireless

Model: CX200TW1, CX200TW1 C, CX200TW1 L, CX200TW1 R

FAQS About Sennheiser CX True Wireless Earbuds

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