Sennheiser CX True Wireless Manual | Pairing Guide

The Sennheiser CX True Wireless come with specs such as Bluetooth 5.2 and BLE support with the aptX, AAC, and SBC codecs, a 2-mic beamforming array, 7mm dynamic drivers in each earbud, a battery life of about 9 hours with a 1.5 charging time, the IPX4 sweat and dust-proof certification, and much more. Learn how to use these earbuds using this Sennheiser CX True Wireless manual!

If you are interested in purchasing these earbuds, you can easily do it using the Sennheiser official website. Also, if you want to give the original manual a look, you can do it here.

Sennheiser CX True Wireless Specs Sheet

Model	Sennheiser CX True Wireless
Weight	Earbuds: 6 grams each Charging case: 49 grams each
Waterproof/IP ratings	IPX4
Bluetooth version	V5.2
Range/Distance	10 meters
Driver	7mm
Audio Decoding	SBC, AAC
Connectivity Port/Charging Cable	Type-C
Speaker frequency response	20Hz – 20kHz
Battery Life	Earbuds: About 9 hours Charging case: About 18 hours
Charging Time	Earbuds: About 1.5 hours Charging time: About 2 hours
App Support	Yes, Sennheiser Smart Control
Controls/Features	Play or pause music, play the next and previous song, turn the volume up and down, answer, end, or reject a call, voice assistant, accept an incoming call and end the current one, reject an incoming call and continue the current one
Accessories	Charging case, user manual, USB cable, silicone ear adapter sets, safety guide
Price	About 130 USD

Sennheiser CX True Wireless Accessories

The earbuds come with the following accessories:

• Charging case.
• User manual.
• USB cable.
• Silicone ear adapter sets.
• Safety guide.

Sennheiser CX True Wireless Manual | All You Have To Know

How to Pair The Earbuds?

To Android And iOS Devices

Step 1: Open the lid of the charging case and take the earbuds out. After that, a “Power on” voice prompt will sound, and they will turn on automatically. A “Connected” voice prompt will sound, meaning that the earbuds are now paired with each other.

Step 2: Press and hold the multifunction touch button on both earbuds for about 3 seconds, until a red and blue light starts flashing for 1 minute approx. and a “Pairing” voice prompt will sound. That means that they are ready to pair with any device.

Step 3: Unlock the desired device.

Step 4: Turn on Bluetooth on the desired device.

Step 5: Go to the device’s Bluetooth settings.

Step 6: Select the “CX True Wireless” earbuds. If a password is needed, type “0000”. After that, a blue light will flash three times, a “Pairing successful” voice prompt will sound, and the pairing will be done.

To PC (Windows)

Step 1: Unlock the desired device.

Step 2: Turn on Bluetooth on the device.

Step 3: Go to the Settings.

Step 4: Go to “Bluetooth and other devices”.

Step 5: Click on “Add device”.

Step 6: Open the lid of the charging case and take the earbuds out. After that, a “Power on” voice prompt will sound, and they will turn on automatically. A “Connected” voice prompt will sound, meaning that the earbuds are now paired with each other.

Step 7: Press and hold the multifunction touch button on both earbuds for about 3 seconds, until a red and blue light starts flashing for 1 minute approx. and a “Pairing” voice prompt will sound. That means that they are ready to pair with any device

Step 8: Select the “CX True Wireless” earbuds. If a password is needed, type “0000”. After that, a blue light will flash three times, a “Pairing successful” voice prompt will sound, and the pairing will be done.

How to Wear?

Step 1: Take both earbuds out of the charging case.

Step 2: Identify the left and right earbuds.

Step 3: Choose the ear tips that best suit your ears.

Step 4: Insert the headphones into the inner canal of the ears.

Step 5: Rotate for the best possible comfort and best fit, and make sure that the microphone is pointing to the mouth.

How to Turn On and Off?

Turn on: Open the lid of the charging case and take the earbuds out. After that, a “Power on” voice prompt will sound, and they will turn on automatically.

Turn off: Place the earbuds into the charging case and close its lid. After that, a “Power off” voice prompt will sound, and they will turn off automatically.

How to Control? / How to Operate? – Instructions

NOTE: The multifunction touch button is placed on the top part of the body of the earbuds.

• Play or pause music: Press the multifunction touch button on any of the earbuds one time.
• Play the next song: Press the multifunction touch button on the right earbud two times.
• Play the previous song: Press the multifunction touch button on the left earbud two times.
• Turn the volume up: Press and hold the multifunction touch button on the right earbud.
• Turn the volume down: Press and hold the multifunction touch button on the left earbud.
• Answer an incoming call: Press the multifunction touch button on any of the earbuds one time.
• End a current call: Press the multifunction touch button on any of the earbuds one time. A “Call ended” voice prompt will sound.
• Reject an incoming call: Press the multifunction touch button on any of the earbuds two times. A “Call rejected” voice prompt will sound.
• Accept an incoming call and end the current one: Press the multifunction touch button on any of the earbuds one time.
• Reject an incoming call and continue the current one: Press the multifunction touch button on any of the earbuds two times.
• Activate the voice assistant: Press the multifunction touch button on any of the earbuds three times.

How to Activate The Mono Mode?

To activate or deactivate the mono mode in these earbuds, all you have to do is to pair the earbuds to the device and take out one of the earbuds from the charging case. It will start working by itself.

How to Charge The Earbuds?

Earbuds

To charge the earbuds, all you have to do is to place them into the charging case and close the lid. The earbuds will start charging automatically.

Charging case

To charge the charging case, all you have to do is to connect the case to a USB charger or charging port with the included USB-A to C cable. It will start charging automatically.

The Earbud’s Voice Prompts

• Power on: The earbuds turn on.
• Power off: The earbuds turn off.
• Connected: The earbuds are connected to each other.
• Not connection: The earbuds could not connect to each other.
• Pairing: The earbuds are ready to pair with any device.
• Pairing successful: The earbuds are connected to the device.
• Pairing failed: The earbuds could not connect to the device.
• Recharge headset: The battery is almost empty and must be charged.
• Call rejected: An incoming call was rejected.
• Call ended: A current call has ended.

How to Reset The Earbuds?

Step 1: Delete all pairing records of the “CX True Wireless” earbuds from the connected device.

Step 2: Turn off Bluetooth on the device.

Step 3: Take one earbud out of the charging case and keep the other one inside of it.

Step 4: Press and hold the multifunction touch button on said earbud for about 10 seconds, or until a green and red light starts flashing and a “Pairing” voice prompt sounds.

Step 5: Place the earbud back into the charging case, and leave the lid open.

Step 6: Take the other earbud out of the charging case and keep the other one inside of it.

Step 7: Press and hold the multifunction touch button on said earbud for about 10 seconds, or until a green and red light starts flashing and a “Pairing” voice prompt sounds.

Step 8: Place the earbud back into the charging case, and leave the lid open. When a blue light flashes three times on the earbuds, and the “Pairing successful” voice prompt sounds, the resetting will be done.

What Do The Lights Mean?

Earbuds

• A red and blue light flashing for 1 minute approx.: The earbuds are now in pairing mode.
• A blue lights flash 3 times: The earbuds are connected to the desired device.
• A red lights flash 3 times: The connection between the earbuds and the device failed.
• A blue light on: The earbuds are connected to a device via Bluetooth.
• A red light on: The earbuds are not connected to a device via Bluetooth/the connection has been lost.
• A red lights flash quickly: The rechargeable battery is almost empty.
• A red lights flash slowly: System error (reset the earbuds).
• A green and red light flashing for 1 minute approx: The earbuds are in earbud pairing mode (to pair the right and left earbuds).

Charging case

• A yellow light flashing while charging: The case is charging.
• A green light flashing while charging: The case is fully charged.
• A red light flashing while charging: There was a charging error/a battery error has been detected in at least one earbud.
• A yellow light flashing while charging with the earbuds inside: The earbuds are charging.
• A green light flashing while charging with the earbuds inside: The earbuds are fully charged.
• A red light flashing while charging with the earbuds inside: There was a charging error/a battery error has been detected in the charging case.
• A green light flashing with the earbuds inside: The earbuds are fully charged.
• A yellow light flashing with the earbuds inside: The earbuds are charging.
• A yellow light stays on with the earbuds inside: The earbuds are fully charged but the case can’t charge a complete cycle (less than 90% of battery).
• A red light stays on with the earbuds inside: The rechargeable batteries of the earbuds and the charging case are empty.
• A red light flashing with the earbuds inside: There was a charging error/a battery error has been detected in the charging case.

A Guide To The Sennheiser CX True Wireless App

The Sennheiser CX True Wireless earbuds can be used with an application, called Sennheiser Smart Control. This application is available for iOS and Android devices. Through it, the user will be able to see information about the earbuds, as well as all the internal characteristics that it has, in addition to being able to change and update them.

• First page: This is the home page, and it shows the battery percentage of the earbuds and the menu.
• Second page: This is the equalizer, where you can change and modify the bass, tremble, and others in the earbuds.
• Third page: Here are the devices to which the earbuds are connected. As you like, they will be able to connect or disconnect from the earbuds with a single click.
• Fourth page: Earbuds controls. Here you will be able to see the available controls of the earbuds, also, they will be able to be modified depending on the user’s tastes.
• Fifth page: You will be able to see all the specifications of the earbuds, as well as the possibility of changing certain factory features of these.
• Sixth page: Here, you will be able to see the firmware version, and you will be able to update it if necessary.
• Seventh page: Finally, there are the settings of the app, where you can choose a language, see its version and reset it if necessary.

How to Install Firmware Updates?

Step 1: Before updating, make sure that the earbuds are out of the charging case, and don’t place them into it while updating.

Step 2: Connect the earbuds to the Sennheiser Smart Control app.

Step 3: The app provides information related to available firmware updates and guides you through the installation process.

Some Common Problems & Troubleshooting

Left / Right / One side of the earbuds has stopped working

If this happens, it may be because it is low on battery or it did not connect correctly with the device. To fix this, you can do the following:

1. Try charging the earbud that is not working or both, placing them in the charging case.

2. Try factory resetting the earbuds.

3. Check if the earbuds are operating within a normal working range

If that doesn’t work, the earbud is probably faulty, and I can go for a refund or replacement of it.

Left / Right / One side of the earbuds has a low volume

If this happens, it may be because the earbuds are dirty or the volume is set low. To fix this, you can do the following:

1. Try cleaning the earbud using a cotton swab or carefully clean the mesh with a pin.

2. Try factory resetting the earbuds.

The microphone is not working

If this happens, it can be because the microphone is muted, or the earbuds are badly positioned. To fix this, you can do the following:

If the microphone is muted, check the device microphone volume. If that doesn’t work, that means that there might be a defect in the earbud, so try replacing them or get a refund.

The earbuds are not connecting to Windows/laptop/PC

If the earbuds are earbuds not connecting, it can be because the Bluetooth on the computer has a pairing problem. To fix this, you can do the following:

1. Try disabling Bluetooth from nearby devices >>> then activate the pairing mode of the earbuds, pair and connect earbuds from Settings >>> Bluetooth & other devices >>> Add a new device >>>> select Bluetooth.

2. Try uninstalling and reinstalling the Bluetooth driver, or updating the Bluetooth driver. All can be done in Manage >>> Device Manager, reset earbuds (if available), and then repeat the step.

3. Try resetting the earbuds.

FAQs

We hope you now know how to operate the earbuds from the above Sennheiser CX True Wireless manual. Want to know anything about the earphones? Do not hesitate to ask in the