Question 1

What makes the MOMENTUM True Wireless 4 so unique?

Accepted Answer

With MOMENTUM True Wireless 4 from Sennheiser, you can step into the future of wireless audio. Unveil personalized, crystal-clear audio through Sennheiser’s TrueResponse transducer system. Lossless audio support guarantees flawless wireless sound. Tailor your sound using our research-based Sound Personalization developed in collaboration with the Fraunhofer Institute. Enjoy advanced wireless features, like Bluetooth 5.4, LE Audio and Auracast™ support. The ergonomic design ensures all-day comfort, while adaptive ANC lets you focus on your audio, and Transparency Mode provides awareness of the surroundings. The 6-mic system refines calls and voice assistants. Enjoy 30 hours of listening plus quick charging. Explore modern features, timeless design, and Sennheiser quality in one product.

Question 2

What are the key features of the MOMENTUM True Wireless 4?

Accepted Answer

Sennheiser´s signature sound: Delivers exceptional, artist-intended sound fidelity, ensuring every detail and emotion is captured thanks to our TrueResponse transducer system that delivers a high-end sound experience with impactful bass, refined with an improved treble response.
Future-proof technologies: Step into the future with Auracast™ support and LE Audio and enjoy the latest codecs with Bluetooth 5.4 compatibility.
Adaptive Active Noise Cancellation (ANC): Automatically adjusts noise cancellation to surroundings, providing an immersive listening experience.
Complete control of your sound: Choose between multiple ways of customizing your sound: guided tests for personalized sound profiles, adaptative 5-band EQ, Sound Zones, Sound Check or pre-set modes.
Long Battery Life: Up to 7.5 hours of playtime, extendable to 30 hours with the charging case, and quick charging for an hour of playtime in just 8 minutes.
Lossless Audio: Guarantees bit-by-bit flawless transmission of audio, maintaining uncompromised sound quality during wireless listening.
Natural Transparency Mode: Lets in outside sounds for awareness without removing earbuds, ensuring natural interactions with the environment thanks to low noise mics.
6-Mic System: Enables clear calls and seamless interaction with voice assistants, even in noisy surroundings.
Ergonomic Design: Assorted sizes of soft silicon ear tips and fins for a comfortable fit that enables extended listening sessions.
Timeless Design: Minimalist aesthetics with premium metallic finishes display a blend of modernity and classic Sennheiser quality. Available in Black Graphite, White Silver, and Black Copper.
Customizable Touch Interface: Intuitive controls for playback, calls, and voice assistants enhance user experience.
Qi Wireless Charging: Conveniently recharge the battery case wirelessly using compatible Qi chargers.
Voice Assistant Compatibility: Seamlessly interact with voice assistants such as Siri or Google Assistant.

Question 3

Why should I upgrade to the MOMENTUM True Wireless 4?

Accepted Answer

With MOMENTUM True Wireless 4 we introduce latest Bluetooth technology to bring the wireless audio transmission to perfection. This is achieved by lossless wireless audio transmission in combination with an industry-leading Bluetooth performance, so that there is no worry about audio dropouts. Thanks to the support for next generation Bluetooth standard LE Audio and Auracast™, the MTW4 is perfectly future-proof. This also includes ultra-low-latency down to 20ms and a refined Sennheiser signature sound. There are over a dozen of major upgrades like an enhanced tuning to provide meaningful audio experiences and to create our best-ever true wireless product.
Over 12 improvements:
Refined tuning; sounds smoother and more satisfying
More robust connection for stronger connection, even in busy areas
New battery system
Improved ANC performance
Supports Bluetooth LE Audio (firmware update required)
New battery protect mode keeps battery charging at optimum rates
Snapdragon sound that supports aptX™ Lossless
Supports Auracast™ (firmware update required)
Enhanced charging pins
Updated eartips and nozzles for protection vs earwax
Bluetooth 5.4 feature set
Extended playtime of 30 hours in total
AI-enhanced voice pickup (firmware update required)
Low-latency audio mode
For more information about Sennheiser’s True Wireless product range, use the following link: 
https://www.sennheiser-hearing.com/true-wireless/

Question 4

Does the new MOMENTUM True Wireless 4 come with the same outstanding sound signature as the predecessor?

Accepted Answer

Designed by Sennheiser’s audio experts, the True Response transducers with its 7mm dynamic drivers used by this system ensures outstanding sound, which was further refined in the frequency response for the MOMENTUM True Wireless 4 to match even better our customers' expectations. We have improved the treble response and created slightly more clarity in the mids, while keeping the immersive base. The superior sound is supported by an either lossless or high-resolution and low-latency Bluetooth wireless transmission with up to 24bit / 96kHz thanks to Qualcomm’s Snapdragon Sound and aptXTM adaptive codec technology.
There are also advanced options to personalize the sound to your individual preferences. Next to the internal audio EQ you can select predefined audio presets like Bass Boost or you use the new Sound Personalization feature developed by the famous Fraunhofer institute of Germany to setup the sound profile by a guided listening test.
To learn more about the German-made TrueResponse™ transducer, use the following link: 
https://www.sennheiser.com/newsroom/engineered-for-goosebumps

Question 5

I work, commute, and travel all the time. Is the MOMENTUM True Wireless 4 a good option when on the go?

Accepted Answer

The MOMENTUM True Wireless 4 has been created to deliver the best possible sound experience at any time. With enhanced features including Adaptive Active Noise Cancellation (ANC), adjustable Transparency Mode, improved ergonomics, and superior all-day battery life it is now even better to enjoy on the go. Our anti-occlusion system minimizes discomfort while walking and speaking by compensating air pressure changes in the ear channel, when using ANC. Furthermore, effortless ease of use and up to 30h playback time ensures that it is the ideal everyday audio companion.

Question 6

Can the MOMENTUM True Wireless 4 block out ambient noise by ANC (Active Noise Cancellation)?

Accepted Answer

No matter how busy or noisy the environment, Sennheiser’s next-generation Adaptive ANC seamlessly adapts to ensure that every beat and captivating nuance can be heard. The advanced system utilizes four microphones to continually monitor ambient noise levels and automatically optimize the level of noise cancellation performance to ensure a truly immersive experience. When it is necessary to hear your surroundings or have a conversation, Transparency Mode brings the world back at a touch. The level of Transparency is even adjustable.

Question 7

Does the MOMENTUM True Wireless 4 feature the latest Bluetooth technology?

Accepted Answer

Yes, the MOMENTUM True Wireless 4 is Bluetooth 5.4 compliant (class 1) and supports an industry-leading reliable and stable Bluetooth connection. They support the new Bluetooth LE Audio protocol and Auracast™ besides to the Bluetooth standard connectivity.
Further, the MOMENTUM True Wireless 4 features Bluetooth connections management, which makes it easy to switch between audio sources.

Question 8

What is the benefit of the new Auracast™ feature?

Accepted Answer

Auracast™ is a new way to share and stream audio and is based on the enhanced capabilities of the new Bluetooth LE Audio standard. You can access Auracast™ streams in public areas similar to Wi-Fi and create a private Auracast™ channel to stream your own audio content. So, there can be open, free accessible streams or closed ones. There are many use cases on how Auracast™ will create a beneficial user experience. Here are some examples:
Streaming Bluetooth audio from one notebook or smartphone to many receivers
Enhancing the audio in an auditorium by streaming the speaker’s voice to the audience
Tour guide information systems in museums
Public announcements at airport gates or station platform streams to your headphones
TV set unmuted in waiting halls or gyms
Enhancing the audio or offering an additional language channel in theaters or cinemas
At multistage festivals, you could easily check in real-time the music of each stage
Please refer to the following web page for more information: 
https://www.bluetooth.com/auracast/

Question 9

What is the benefit of the Snapdragon Sound™ feature?

Accepted Answer

Snapdragon Sound™ is a technology provided by Qualcomm and enhances the audio experiences by providing a robust and high-performance wireless audio connectivity. This included aptX Lossless, Low-Latency and even best voice quality during calls.
For more information, please visit Qualcomm’s Snapdragon Sound™ webpage:

https://www.qualcomm.com/snapdragon/audio

Question 10

Which Bluetooth codecs are supported by the MOMENTUM True Wireless 4?

Accepted Answer

MOMENTUM True Wireless 4 supports the following Bluetooth codecs: SBC, AAC, aptX™ Standard and aptX™ Adaptive, which includes lossless and high-resolution wireless audio transmission. Advanced audio codecs (like AAC and aptX™) provide hi-fi audio allowing you to enjoy the rich uncompromised listening experience you expect. Thanks to its support for the new LE Audio standard MTW4 also supports the new Bluetooth codec LC3.

Question 11

What is so special about the MOMENTUM True Wireless 4 design?

Accepted Answer

Our focus with MTW4 is providing superior sound experiences with future-proof technologies. Matching this forward-thinking approach to technology is its timeless aesthetic. Our earbuds are based on the 3rd generation of MOMENTUM True Wireless, which won the Red Dot Design Award 2022 for their elegant and comfortable design. They are highly regarded for their premium materials which provide a luxurious and sleek touch and feel making it a consumer´s favorite. Thanks to the selection of four assorted sizes of ear tips and three different sizes of ear fins, we are confident that most users will find the perfect fit for their ears with MOMENTUM True Wireless 4.

Question 12

What is the battery life of the earbuds?

Accepted Answer

MOMENTUM True Wireless 4 delivers up to 7.5 hours of playback time. Using the charging case, which features an integrated power bank, the earphones can be charged on-the-go for a total of 30 hours of playback time.

Question 13

How do I charge the earbuds and carrying case?

Accepted Answer

The earbuds charge automatically once placed into the charging case. The case itself can be charged either via an USB-C cable or by Qi wireless charging.
Using USB-C, the MOMENTUM True Wireless 4 will be fully charged after approx. 1.5 hours. Furthermore, with just 8 minutes of charging you can get already additional 1.5 hour playback time. By Qi wireless charging the charging time may be extended compared to USB-C charging.
However, due to the 30 hours total playback time, charging of the MOMENTUM True Wireless 4 is only rarely necessary.

Question 14

What are the options to individualize the sound to your personal preferences?

Accepted Answer

With this new generation of MOMENTUM True Wireless and the Smart Control App there are several intuitive ways to customize the sound. Once the set-up is done, all EQ parameters are stored inside the earbuds, making the personalized sound available with any music source.
Sound customization features of the MOMENTUM True Wireless 4:
- Sound Personalization: adjust the sound to your taste with a guided listening test develop based on extensive research in collaboration with the Fraunhofer Institute in Germany.
- Built in equalizer (EQ): certain audio frequency ranges can be boosted, lowered and left unchanged to individualize the sound.
- EQ Presets: select predefined audio presets like Bass Boost and Podcast mode.
- Sound Check: supports you to find the perfect EQ preset
- Sound Zones: adjust audio settings and noise cancellation for geographical locations that you define.

Question 15

Can I change the touch control assignments?

Accepted Answer

Operation is brilliantly intuitive thanks to customizable touch controls that let the user define their preferred way of controlling audio, calls or activating the voice assistant like Google Assistant or Apple Siri.
Left and right earbuds may have different control assignments, and these can be changed easily by the Sennheiser Smart Control app.
Although customization is made easy, the default touch control assignments have been created to provide an intuitive option for users that want to control music, phones calls and voice assistance.

Question 16

Can I use one single earbud as a stand-alone device?

Accepted Answer

To make it even more convenient to use, the MOMENTUM True Wireless 4 provides the possibility to use the left and right earbud individually. It can be used in different situations - for example when you need to stay aware to your surroundings while still listening to the important call or in case you need to charge one of the earbuds during a call. You can dynamically decide whether you want to use both earbuds or only one.

Question 17

How do I access the voice assistant?

Accepted Answer

Users can activate a preferred voice assistant such as Google Assistant or Apple Siri by a convenient tap gesture on the earbud. The voice assistant selection depends on the specific smartphone configuration. Via the Sennheiser Smart Control app, the user can customize this control to use any touch gesture for voice assistant selection or, if preferred can disable voice assistant access.

Question 18

Are the MOMENTUM True Wireless 4 waterproof?

Accepted Answer

MOMENTUM True Wireless 4 earbuds have a splash resistant design for all weather conditions. They have been successfully tested to meet IP54* standards, which means they are splash resistant and can be used in the rain. However, they are not meant to be submerged under water, worn in the shower or rinsed under running water. Wetted earbuds should be dried up with cloth before docking back to charging case.
The charging case itself is not tested for waterproofness.
* Rating according to International Protection Marking standard IEC 60529. The earbuds were tested under controlled laboratory conditions. The earbuds are splash resistant for non-water sports and exercise. Splash resistance might decrease as a result of normal use. Do not charge wet earbuds. The charging case is not splash resistant.

Question 19

What kind of product quality tests are done to ensure the Sennheiser product reliability?

Accepted Answer

All Sennheiser product are intensively tested for product quality and reliability. Our quality tests include all kind of mechanical, electrical, thermal and chemical test, e.g., dust and splash resistance tests, drop tests, tumbling tests, UV color stability test, scratch and rub testing, chemical resistance test, ESD tests, RF/Bluetooth stability and interference tests, and many more….
By these tests we validate the product for reliability and robustness for long lifetime even at tough conditions. But even if something happens to your product, you are covered by our 2-year warranty.

Question 20

Can I connect to more than one Bluetooth device simultaneously (so-called “Bluetooth Multipoint Connection”)?

Accepted Answer

You can pair MOMENTUM True Wireless 4 with up to six different Bluetooth devices. The earbuds stores and remembers these pairings.
Thanks to Multipoint connect feature the MOMENTUM True Wireless 4 can be connected to two of these paired devices simultaneously, e.g. play music from one Bluetooth device and switch easily to another Bluetooth device without setting up a new Bluetooth connection.
Within the Sennheiser Smart Control app you can get an overview of the paired Bluetooth devices and manage your BT connections.

Question 21

Can I use the MOMENTUM True Wireless 4 without the Sennheiser Smart Control app?

Accepted Answer

Yes, in general you can use the MOMENTUM True Wireless 4 without the Sennheiser Smart Control app for music listening, phone calls and voice assistant access. We recommend using the Smart Control app, since it further enhances your experience by adding several additional personalization options such as adjusting the audio EQ, configuring Transparency mode or customizing the touch controls. The Smart Control app also enables you to receive the latest firmware updates.
To learn more about the Sennheiser Smart Control app, please use the following link:

https://www.sennheiser-hearing.com/smartcontrol

Question 22

How can I access the Sennheiser Smart Control app in case I do not have access to the app store?

Accepted Answer

How can I access the Sennheiser Smart Control app in case I do not have access to the app store?
The Sennheiser Smart Control app is available in the Android Play Store and iOS App store.
In case you want to direct download the app, please use the following download link (for Android only):

https://firmware.s-consumer-cloud.com/redirect/getSmartControl.html

Question 23

Are the batteries replaceable?

Accepted Answer

The batteries of the earbuds and charging case cannot be exchanged.
The MOMENTUM True Wireless utilizes embedded high-quality rechargeable Li-Ion batteries, intensively tested and qualified to meet the highest international quality standards. They are sealed inside the housing for high robustness and tested for IP54 splash and dust resistance. The earbuds build to last for long lifetime and we offer replacement parts and a 2 years global warranty program.

Question 24

Is the MOMENTUM True Wireless 4 battery system improved compared to the predecessor MOMENTUM True Wireless 3?

Accepted Answer

The MOMENTUM True Wireless 4 offers over a dozen improvements--one of them being battery reliability. A limited number of MOMENTUM True Wireless 3 experienced inconsistent battery performance, which has been and will continue to be exchangeable under our 2-year warranty. As we do not manufacture batteries ourselves, we have combined MOMENTUM True Wireless 3 customer feedback with extensive testing of defective units to exhaustively examine our battery supplier standards and processes. We have since selected a new, trusted partner for the MOMENTUM True Wireless 4 and all future Sennheiser products. Furthermore, a battery optimization firmware feature has been added to the new MOMENTUM True Wireless 4, while the playtime has been improved to 30 hours.

Question 25

Which ear adapters are included in the box?

Accepted Answer

The enhanced ergonomics of the MOMENTUM True Wireless 4 guarantees exceptional all-day wearing comfort. Sennheiser’s most compact earbuds come with a choice of 4 sizes of ear adapters (XS, S, M, L) and optional silicon fins in 3 sizes (S, M, L) that help keep the earbuds securely in place.
It is recommended to use the correct ear adapter and ear fin size to form a perfect seal within the ear-canal for an optimal listening experience. By the Sennheiser Smart control app you can run an earbud fitting test, which checks the correct sealing of your device.

Question 26

What kind of quality improvements were done for the MOMENTUM True Wireless 4 vs. its predecessor?

Accepted Answer

We are constantly improving our MOMENTUM True Wireless line and want to give our customers the best possible experience. Therefore, we are closely monitoring and analyzing customer feedback and the return reasons of customers to provide solutions for these quality issues. On both the hardware and the software side we made significant improvements to erase known limitations and at the same time we increase the user experience, and we will continue to do so in the future.
To mention some of the improvements, with the MOMENTUM True Wireless 4 we utilize a new high-quality battery system for an extended long lively of the product, we significantly improved the Bluetooth antenna performance for an audio drop-out free use in critical situations, we improved the ear tips for a better cerumen protection, we improved robustness against dust and sand by an IP54 rating, we introduced a battery protection mode for an optimized healthy charging, we improved the scratch resistance by the new metallic earbud housings, we improved the Transparency and adaptive ANC performance by low-noise microphones, we improved the app connectivity in speed and reliability, and many more details of the product.

Question 27

Where can I find further MOMENTUM True Wireless 4 product information?

Accepted Answer

Further information e.g., a downloadable user manual, can be found on Sennheiser’s MOMENTUM True Wireless 4 product page in the section “Downloads”.:

https://www.sennheiser-hearing.com/p/momentum-true-wireless-4/

Question 28

What do I need to do to get the best experience once I unpack my new MOMENTUM True Wireless 4?

Accepted Answer

• Wake up the earbuds by placing them into the charging case and connecting the USB-C cable. We recommend to fully charge the MOMENTUM True Wireless 4 before first time use.
• Select the correct ear adapter from a selection of four sizes (XS, S, M, L). Choose the ear adapter size that provides an exceptionally good seal to enjoy the best possible audio experience.
• Twist the earbuds slightly into your ear for perfect and secure fit.
• Optimize the secure fit by selecting one of the ear fins (S, M, L). Choose the ear fin size what fits best to your ear shape.
• Pair the earbuds with your smartphone. The Bluetooth pairing mode is activated automatically once you first power-on the earbuds. Alternatively, you can manually activate pairing mode by pressing both touchpads for at least 3 seconds. In the Bluetooth menu of your smartphone, select “MOMENTUM TW 4”.
• A voice prompt will inform you once the pairing was completed successfully. Alternatively, the LED indicator at the earbuds will indicate a successful Bluetooth connection by blue.
• Download the Sennheiser Smart Control app from your app store to run the earbud fit test and to personalize your MOMENTUM True Wireless 4 experience.
• For further information and support, consult the supplied quick guide or online user manual downloadable from Sennheiser webpage.

Question 29

What should I check or adjust to make sure the sound is at its absolute best?

Accepted Answer

The MOMENTUM True Wireless 4 has been created to provide exceptional sound performance, thanks to Sennheiser’s TrueResponse™ transducers, the internal audio EQ and latest high-resolution Bluetooth codecs.
However, to experience this sound to the fullest, it is essential to correctly place the earbuds in the ear-canal and to choose the best-fitting ear adapter and ear fin set. The MOMENTUM True Wireless 4 comes with four sizes of ear adapters (XS, S, M, L) or 3 sizes of ear fins (S, M, L) included in the box. The MOMENTUM True Wireless 4 quick guide explains precisely how to twist the earbuds into your ears to form a perfect seal within the ear-canal. It might be possible that you need different ear adapter or ear fin sizes per ear.
By the Sennheiser Smart control app you can run an earbud fitting test, which checks the correct sealing of your device.
Please note that the sound may have been adjusted using the EQ function of the Sennheiser Smart Control app. To see if this is the case, connect to the Smart Control app and check the equalizer settings to ensure the desired sound.

Question 30

What settings are recommended to get the 7.5-hour playback time that’s specified?

Accepted Answer

The specified battery time of 7.5 hours (total battery life of 30 hours including charging case) has been confirmed for music listening under the following conditions:
- MOMENTUM True Wireless 4 earbuds are fully charged for at least 1.5 hours
- iPhone within 1-meter distance
- Bluetooth AAC codec
- Volume level set to mid-level
- Transparency Mode and Active Noise Cancellation feature turned off
- Customized EQ turned off
The playback time may differ under different operating conditions.

Question 31

Will the ANC and Transparency Mode feature be affected by windy outdoor conditions?

Accepted Answer

When using ANC or Transparency Mode outdoors in stormy weather conditions or when cycling, wind noise may have impact on the listening experience. As MOMENTUM True Wireless 4 has been designed to be portable it utilizes small microphones which, due to their compact nature can’t also be optimized for certain strong wind situations. Under wind conditions, it is recommended to enable the “Anti-Wind” mode within the Sennheiser Smart Control app.

Question 32

How do I check for, receive and install firmware updates?

Accepted Answer

When using the Sennheiser Smart Control app, you will receive a notification once a new firmware release is available. The app will guide you through the update process. The firmware update will be installed over-the-air via the Bluetooth wireless connection.
Additionally, you can always check for the current firmware release status in the Smart Control app’s settings.

Question 33

How do I use Auracast™?

Accepted Answer

Auracast™ will be available via a firmware update later in the year, so please make sure to always install the latest firmware update throughout the Sennheiser Smart Control app. Once this feature is unlocked, you will receive a notification by our Sennheiser Smart Control app.

Question 34

When will Bluetooth LE Audio be available?

Accepted Answer

Bluetooth LE Audio will be available via a firmware update later in the year, so please make sure to always install the latest firmware update throughout the Sennheiser Smart Control app. Once this feature is unlocked, you will receive a notification by our Sennheiser Smart Control app.

Question 35

Do the earbuds switch off automatically when not in use?

Accepted Answer

The MOMENTUM True Wireless 4 has integrated power-saving features. When the earbuds are disconnected from a Bluetooth source and not in use, they can be configured to switch off automatically.
The duration until earbuds gets switched off automatically can be customized by the Sennheiser Smart Control app, by default it is set to “never”.
To turn the earphones on again, press one of the touch pad or place them for a brief time into the charging case.

Question 36

What is the difference between the audio resolution modes?

Accepted Answer

In the device settings menu of the Sennheiser Smart Control app you can select between 4 different audio resolution modes:
- Standard - High quality audio codecs are used like SBC, AAC, aptX™ Adaptive or LC3
- High-Resolution – High resolution audio codec up to 24bit / 96kHz audio resolution
- Lossless – Bit-by-bit exact wireless transmission with 16bit/ 44.1kHz audio resolution
- Low Latency – Latency optimizations of Standard audio codecs, e.g. for mobile gaming
Please consider, that the audio resolution mode “Standard” provides the most robust wireless audio transmission, so select “standard” when you are in high interference situations like public crowded places.

Question 37

What do I need to consider when switching between the audio resolution modes like “Lossless”, “Low Latency” and “High-Resolution”?

Accepted Answer

The audio resolution “Standard” delivers already a high-quality audio experience with support for AAC, aptX™ and aptX™ Adaptive as well as LC3 depending on the capabilities of your audio source.
It is recommended to enable the advanced audio resolution modes “High-Resolution” and “Lossless” only when you intend to enjoy the sound performance down to the last detail.
When activated, either the “High-Resolution” or “Lossless” mode gets defined as the preferred mode. To ensure a seamless audio experience without any dropouts, the device adaptively might decide to scale down to “Standard” again. Which codec and audio resolution you are actually using can be checked in the Smart Control app in the settings menu at item “Codec”.

Question 38

What do I need to consider when using the MOMENTUM True Wireless 4 for gaming?

Accepted Answer

Thanks to the support for LE Audio and further improvements by enhanced audio capabilities of Qualcomm’s powerful Snapdragon Sound technology, the MTW4 has an incredible ultra-low latency down to 20ms. In combination with their true-to-life sound, they are perfectly suited for gaming, even for highest demand on performance.
Highest performance can be only achieved by a Snapdragon Sound LE audio system on the audio source side. By this setup we can even enable a voice backchannel for communication while experiencing the superior Sennheiser sound quality in parallel. For Bluetooth classic we recommend activating the Low Latency mode in the Sennheiser Smart Control app, which will do already some improvements on latency, but the results are depending on the audio source codec support and capabilities.

Question 39

Why do I see only one battery level for both earbuds in the Sennheiser Smart Control app?

Accepted Answer

The battery level indicator always shows the remaining battery life of the earbud side with less power.
Examples:
- If left earbud has 50% battery level and right earbud has 80% battery level, it indicates 50% battery level.
- If left earbud has 90% battery level and right earbud has 20% battery level, it indicates 20% battery level.
- If only right earbud is in use and left earbud remains in the charging case, it indicates the right earbud battery level.

Question 40

What do I need to consider when charging wireless instead of USB-C?

Accepted Answer

The MOMENTUM True Wireless 4 is certified for QI wireless charging as a convenient charging option. When charging wireless, please note the following:
- Charge only with QI certified wireless charging pads.
- Place the MOMENTUM True Wireless 4 charging case with the earbuds into the middle of the Qi wireless charging pad.
- Depending on the charging pad the charging might start with a few seconds of delay.
- At higher ambient temperatures charging slows down. Check the manual for the specified temperature range for charging.
- The charging time is extended by wireless charging compared to USB-C charging.
- For safety reasons, in general do not charge products unattended.

Question 41

Do you have a list of places available where I can experience Auracast™? E.g., theatres, cinemas, airports, train stations etc.?

Accepted Answer

Auracast™ is a new way to share and stream audio. With Auracast™, streams get accessible in public areas similar to WiFi. There can be open, free accessible streams or closed ones. Auracast™ is part of standard Bluetooth and so proprietary solution, so with more and more new LE Audio based devices the offerings will increase, so this is very dynamic. Some manufactures of smart phones and TV sets even announced, that current devices are getting by firmware upgrades for Auracast™ capabilities. Currently there is no official list of public sites available, where Auracast™ can be experienced already. If this gets available, we will update you here.

Question 42

Can I enjoy “Lossless” with any audio source?

Accepted Answer

Lossless audio delivers the basically the ultimate sound quality, the wireless audio transmission is mathematically bit-by-bit exact, so as a listener you do not need to be concerned to miss any details of the original audio content. The audio resolution for the wireless lossless transmission is 41.1kHz and 16bit, the same quality as on a CD (compact disc).
In order to enjoy the “Lossless” audio quality, the audio source needs to support it as well, since this format is not a Bluetooth standard.
Ensure the following:
- The smartphone or audio source needs to be Snapdragon Sound certified
- The smartphone or audio source needs to support aptX™ Adaptive Lossless
- Activate “Lossless” audio resolution mode in the Sennheiser Smart Control app
A list of suitable phones can be found at the Qualcomm’s product listing webpage: 
https://www.aptx.com/product-listing

Question 43

How shall I clean and maintain my earbuds?

Accepted Answer

First at all, attention: Liquids can damage the electronics of the product!
Liquids entering the housing of the product can cause a short-circuit and damage the electronics. So, keep all liquids far away from the product and 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.
Regularly, check the ear tips and nozzle part for any blocking dirt. If necessary, do the following steps for cleaning:
- Remove the ear adapters from the earbuds’ in-ear sound tunnels.
- Using a dry, clean brush (e.g. toothbrush), lightly brush over the in-ear sound tunnel openings to remove any dirt above the protective fabric. Avoid damaging the protective fabric within the in-ear sound tunnels to prevent dirt or debris from entering the electronic.
- You can clean the silicone ear adapters and silicone ear fins under lukewarm running water. Let the ear adapters and ear fins 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, e.g. with a cotton swab.
To remove any dirt such as dust accumulation or lint from the USB socket of the charging case:
- Blow into the USB socket or carefully brush a fine object (e.g. a toothpick or the bristles of a toothbrush) through the opening of the socket.

Question 44

How can I reset the earbuds?

Accepted Answer

If the functions of the earbuds are disturbed, you will need to perform a software reset to initialize the earbuds. A software reset will be done each time you insert the earbuds into the charging case and wait for at least 10 seconds.

Question 45

How can I perform a factory reset?

Accepted Answer

If the functions of the earbuds are disturbed and a soft reset does not fix the issue, reset the earbuds to the factory default settings. This deletes, among other settings, all pairing settings.
You can reset the earbuds to the factory default settings using the Smart Control app in the settings menu.
Using the Smart Control app is the easiest way to perform a factory reset.
Alternatively, you can reset the earbuds to the factory default settings by the following steps (well, we made it extra difficult to avoid any unintended factory resets):
- Disconnect your MOMENTUM True Wireless 4 from any Bluetooth connection by deactivating Bluetooth at your audio sources (smartphone etc.). If you are connected to an Auracast™ transmitter, disconnect it via the Smart Control app.
- Take only one earbud out of the charging case.
- Keep the other earbud inside the charging case and close the charging case lid.
- On the earbud outside of charging case, hold the touch control for at least 15 seconds.
- As soon as the earbud LED starts alternating green/red, release the touch control.
- After releasing the touch control, the earbud LED continues to alternate green/red.
- Take the second earbud out of the charging case.
- Now on the second earbud, hold the touch control for at least 15 seconds.
- As soon as the earbud LED starts alternating green/red, release the touch control.
- The earbuds are now getting again factory resetted and synced with each other, what takes a few seconds.
- Successful factory reset and earbud syncing is indicated by LED when it starts alternating blue/red.
- The factory deletes, among other settings, all Bluetooth pairing settings and your MOMENTUM True Wireless 4 needs to be paired again with your smartphone.

Question 46

What should I check if I can’t hear anything when using the earbuds?

Accepted Answer

First at all, you should restart your smartphone and check for latest software updates of your phone.
If you can’t hear any audio, check the following:
Make sure that the earbuds are charged and connected to your Bluetooth device.
Check in the Bluetooth settings of your connected device that media and calls connection are activated.
Make sure the earbuds are inserted into your ears correctly.
Increase the volume on your Bluetooth device and on the earbuds by pressing on the right earbud’s touch pad until you hear the voice prompt “Volume max”.
Ensure that by Bluetooth multipoint the earbuds not unintentionally actively connected to another device. Try to switch of your other Bluetooth audio sources to which you might be connected.
If, after the steps above, audio still does not work, restart the earbuds (see “How can I reset the earbuds?”).
Start the search for Bluetooth devices on your smartphone and select “MOMENTUM TW 4”.

Question 47

What should I check if I can’t pair the earbuds with my Bluetooth device?

Accepted Answer

If Bluetooth pairing does not work, proceed in the following order:
- Charge the MOMENTUM True Wireless 4 for at least 1.5 hours to ensure they are fully charged. The charging LED pulsates yellow to indicate charging and permanent green to indicate they are fully charged.
- Take the earbuds out of the charging case.
- Simultaneously touch and hold the right and left touch control for 3 seconds to start pairing mode. The LED of the right earbud flash red and blue.
- Start the search for Bluetooth devices on your smartphone and select “MOMENTUM TW 3”.
- If necessary, enter the default pin code “0000” on your smartphone.
If, after the steps above, the Bluetooth pairing still does not work, restart the earbuds (see “How can I reset the earbuds?”).

Question 48

What could be a reason why the earbuds may not recharge as usual?

Accepted Answer

Ensure that the charging contacts of the earbuds and the charging case are clean. If charging is still not possible, perform a reset and a factory reset of the earbuds.
The charging duration may be extended when using Qi wireless charging instead of USB-C charging.

Question 49

How can I adjust the earbuds to a comfortable volume or make them louder?

Accepted Answer

For some Android smartphones there is a separate volume control for the Bluetooth headset and for the Android smartphone. Ensure that both volume controls are set to max. To increase volume, tap and hold the touchpad of the right earbud until you hear the voice prompt “Volume max”. Now increase the smartphone’s volume to maximum volume.
For smartphones that feature “absolute volume control” such as the Apple iPhone, there is only one volume control available, so you can either use the smartphone’s or MOMENTUM True Wireless 4 volume control.
Furthermore, you might not be able to perceive the full volume of the MOMENTUM True Wireless 4 because the earphones currently do not fit correctly. Please use the appropriate size of ear adapters so they fit snugly in your ear canal and completely seal your ears. For best results, follow the guidance in the quick guide on how best to place the earbuds into your ears.
By the Sennheiser Smart control app you can run an earbud fitting test, which checks the correct sealing of your device.

Question 50

How can I do when the phone call quality on my Windows system, e.g. with Teams, is really bad?

Accepted Answer

In case your calling partner experience a call with your voice highly disturbed by your surroundings, your Windows PC settings might be wrong, and instead of the microphones of MOMENTUM True Wireless 4 you might use the PC or notebook internal microphones. In this case also voices from other persons around can potentially disturb the call.
Ensure, that the Bluetooth audio profile of your Windows system is set to “MOMENTUM TW4 Hands-Free” before initiating a call. The audio profiles can be checked and changed in the Windows notification bar (lower right corner, loudspeaker symbol).
Also, in Teams ensure that device settings for speaker and microphones is set to MOMENTUM True Wireless 4.

Question 51

How can I do when the audio quality on my Windows system, is poor?

Accepted Answer

In case the audio quality does is of poor quality and sounds “mono”-ish, most likely your Windows PC settings might be wrong, and you are in the handsfree protocol for phone calls instead of the Bluetooth stereo mode.
When listening to music or other high-quality audio, ensure, that the Bluetooth audio profile of your Windows system is set to “MOMENTUM TW4 Stereo”. The audio profiles can be checked and changed in the Windows notification bar (lower right corner, loudspeaker symbol). Also, in the Sennheiser Smart Control app under “Settings” you can check if the proper audio codec is used. In case of the phone call mode “No audio streaming” is shown.
Also, in Teams ensure that device settings for speaker and microphones is set to MOMENTUM True Wireless 4.

Question 52

My ANC (Active Noise Cancellation) performance seems to have only limited effect?

Accepted Answer

The MOMENTUM True Wireless blocks out ambient noise thanks to its Adaptive ANC (Active Noise Cancellation) feature which works in combination with its excellent passive noise attenuation and perfect fit in the ear canal.
The advanced system utilizes four microphones to continually monitor ambient noise levels and automatically optimize the level of noise cancellation performance to ensure a truly immersive experience. Thus, in a quite environment the level of ANC is reduced while it goes to its maximum performance in a noisy environment. The adaptive ANC works without negative impact on sound performance, i.e. no additional noise floor is introduced by the ANC system) and optimizes comfort (i.e. no ear pressure is introduced by ANC system). In case you experience only limited ANC performance, consider that in general ANC technology can only reduce ambient noise in low frequency range <1 kHz, e.g. engine sounds. The MOMENTUM True Wireless 4 excellent passive noise isolation additionally reduced significantly ambient noise in higher frequency ranges.
To achieve best possible sound isolation and ANC performance, it is important to choose the ear adapters that best fits your ears.
By the Sennheiser Smart control app you can run an earbud fitting test, which checks the correct sealing of your device.
Further, check that you haven’t activated Anti-Wind mode in Smart Control app to reach maximum ANC performance.

Question 53

What should I check if the audio stream is not “Lossless” even if I activated “Lossless” mode?

Accepted Answer

When you activate the audio resolution mode “Lossless”, its get defined as the preferred mode. To ensure a seamless audio experience without any dropouts, the device adaptively might decide to scale down to “Standard” again. Which codec and audio resolution you are using can be checked in the Smart Control app in the settings menu at item “Codec”.
If you are not in “Lossless” mode when “Lossless” is activated, check the following:
- Check that your audio device, e.g. smartphone, has aptX™ Lossless capabilities
- Keep the MOMENTUM True Wireless 4 close to the audio source
- Check, that there are no RF transmitters nearby which could interfere with Bluetooth
- Try to disable Wi-Fi or other BT devices to check if they are reason for the issue
During the OTA firmware update an error occurred?
Answer:
In case you experience any issues during the OTA firmware update of your MOMENTUM True Wireless 4, please follow the following steps:
- Insert both earbuds into the charging case for at least 10 seconds
- Take the earbuds out of the charging case and connect them again to the Sennheiser Smart Control app
- Repeat the OTA FW update or follow the instruction of the app

Question 54

During the OTA firmware update an error occurred?

Accepted Answer

In case you experience any issues during the OTA firmware update of your MOMENTUM True Wireless 4, please follow the following steps:
- Insert both earbuds into the charging case for at least 10 seconds
- Take the earbuds out of the charging case and connect them again to the Sennheiser Smart Control app
- Repeat the OTA FW update or follow the instruction of the app

Question 55

What to do, when I have a Bluetooth multipoint connection to a Windows PC and can’t switch to my other device?

Accepted Answer

When you are connected to a Windows PC in parallel to a 2nd audio device (e.g. a mobile phone), and you can’t play or hear audio from the 2nd audio device, ensure that the audio stream on the Windows PC has completely stopped. Some Windows system keep the audio connection active, even if you stopped the audio and blocks the MOMENTUM True Wireless 4 from switching to the other multipoint audio sources. This happens when the Windows system keeps using the Bluetooth handsfree protocol after a phone call, since calls have priority over music listening. In this case, change manually in the Windows notification bar (lower right corner, loudspeaker symbol) the audio profile from “MOMENTUM TW 4 Hands-Free” to “MOMENTUM TW 4 Stereo”.

Question 56

When watching video or gaming on my device is there a recommended way to ensure the sound is in sync with the visuals?

Accepted Answer

Perfect synchronization of sound and image is dependent on the Bluetooth technology being used by your Bluetooth device. For best results make sure you are using a Bluetooth device which fully supports Audio Video Distribution Transport Protocol (AVDTP) 1.3 or higher. Thus, depending on the Bluetooth device or the mobile app the audio/video synchronization experience may vary. It is recommended to always use the latest software for your Bluetooth device or the mobile apps.
By the Sennheiser Smart control app you can activate the low latency mode, which improves the latency behavior of the device. For the best experience in standard Bluetooth mode, it is recommended to use an aptX™ Adaptive compatible system.
For most ambitious use cases like gaming down to approx. 20ms latency, an audio device is required, which support Snapdragon Sound in Bluetooth LE Audio mode.

Question 57

How can I ensure the best fit for the earbuds?

Accepted Answer

It’s always best to test the supplied ear adapters to find the size that suits you best and delivers the best sound quality. The MOMENTUM True Wireless 4 packaging includes four different ear adapter sizes (XS, S, M, L) and three different ear fin sizes (S, M, L). Also try to twist the earbuds into your ear as described in the quick guide until you find a comfortable position. Please note that it might be possible that you need different ear adapter sizes per ear.

Question 58

What should I consider if I have issues connecting my smartphone with the Smart Control app?

Accepted Answer

You may try to turn off and turn on the Bluetooth function on your smartphone to reset the Bluetooth module or reboot the smartphone.
You may try to perform a factory reset of the MOMENTUM True Wireless 4. Disconnect the MOMENTUM True Wireless 4 after the factory reset, i.e. remove entries “MOMENTUM TW 4” in the Bluetooth settings of your smartphone and pair MOMENTUM True Wireless 4 again.

Question 59

How do I ensure my voice is picked up clearly during phone calls?

Accepted Answer

If you find that your voice can’t be heard well by the other party on a phone call, you may wish to check the following: During phone calls, ensure that the earbuds are inserted correctly into the ear-canal and then rotate them slightly. Ideally rotate the earbud to ensure the correct beamforming angle for voice pickup (i.e. both outside microphone holes are in line to the mouth). Please also check that the microphone openings are not blocked by the ear itself.
It is recommended to use the correct ear adapter and ear fin size to form a perfect seal within the ear-canal for an optimal call quality experience in noisy environments. This ensures better noise reduction performance by the 3rd microphone of the earbuds.
Additionally, wind may have impact to the quality of the phone call.

Question 60

I have disabled the touch controls. Now I am unable to access pairing mode to pair with a new phone. What do I need to do?

Accepted Answer

When you disable the touch controls, all touch controls and touch sounds are disabled. This comes with one exception: You can always initiate the pairing mode by pressing both touch pads simultaneously for more than three seconds, when the earbuds are out of your ear. In this case, that you do not cover the in-ear sensors with your fingers.

Question 61

How to fix a compatibility issue when pairing the MOMENTUM True Wireless 4 with my Windows 11 PC?

Accepted Answer

When establishing a new Bluetooth connection with a Windows 11 system, the earbuds could under some rare conditions restart unintentionally. This issue was fixed with the latest update of your Windows 11 system, so please check that your Windows system has installed all the latest fixes and updates.
Alternatively, you can activate in your Windows system in the Bluetooth menu the “advanced” settings.

Question 62

My earbud controls (like call mute, call end etc.) do not work when I am in a Teams call. What do I need to consider?

Accepted Answer

The MOMENTUM True Wireless 4 complies to latest Bluetooth standard version 4.3. When using third party communication apps like Microsoft Teams, WhatsApp, WeChat, or others, these apps do not fully comply to the Bluetooth standard depending on the release version. Thus, we cannot guarantee full control functionality by earbud touch gestures during a call. However, we can ensure a great overall call quality by our voice pickup system.

Question 63

How to fix a compatibility issue with my Windows PC after updating the software of my MOMENTUM True Wireless 4?

Accepted Answer

After updating the firmware of your earbuds, you might under certain conditions experience issues to re-connect your earbuds to a Windows PC. In such a case, please ensure the following:
Update the Sennheiser Smart Control app to the latest release.
Clear the cache for the Sennheiser Smart Control App in your phone.
In the Connection Management, delete the Windows PC connection.
On the PC, remove the MOMENTUM True Wireless 4 from the device list.
Restart the Smart Control App.
Pair MOMENTUM True Wireless 4 to your Windows PC again.

Question 64

How to fix a compatibility issue when pairing the MOMENTUM True Wireless 4 with my Windows 11 PC?

Accepted Answer

The earbuds could under some rare conditions restart unintentionally, when establishing a new Bluetooth connection with a Windows 11 system.
We are currently preparing a software fix for this issue and will provide a solution by the next firmware upgrade very soon. By Sennheiser Smart Control app you will be informed about the availability of the new firmware.

MOMENTUM True Wireless 4

Before you start…

During use…

If a problem occurs…

MOMENTUM True Wireless 4

Before you start…

What makes the MOMENTUM True Wireless 4 so unique?

What are the key features of the MOMENTUM True Wireless 4?

Why should I upgrade to the MOMENTUM True Wireless 4?

Does the new MOMENTUM True Wireless 4 come with the same outstanding sound signature as the predecessor?

I work, commute, and travel all the time. Is the MOMENTUM True Wireless 4 a good option when on the go?

Can the MOMENTUM True Wireless 4 block out ambient noise by ANC (Active Noise Cancellation)?

Does the MOMENTUM True Wireless 4 feature the latest Bluetooth technology?

What is the benefit of the new Auracast™ feature?

What is the benefit of the Snapdragon Sound™ feature?

Which Bluetooth codecs are supported by the MOMENTUM True Wireless 4?

What is so special about the MOMENTUM True Wireless 4 design?

What is the battery life of the earbuds?

How do I charge the earbuds and carrying case?

What are the options to individualize the sound to your personal preferences?

Can I change the touch control assignments?

Can I use one single earbud as a stand-alone device?

How do I access the voice assistant?

Are the MOMENTUM True Wireless 4 waterproof?

What kind of product quality tests are done to ensure the Sennheiser product reliability?

Can I connect to more than one Bluetooth device simultaneously (so-called “Bluetooth Multipoint Connection”)?

Can I use the MOMENTUM True Wireless 4 without the Sennheiser Smart Control app?

How can I access the Sennheiser Smart Control app in case I do not have access to the app store?

Are the batteries replaceable?

Is the MOMENTUM True Wireless 4 battery system improved compared to the predecessor MOMENTUM True Wireless 3?

Which ear adapters are included in the box?

What kind of quality improvements were done for the MOMENTUM True Wireless 4 vs. its predecessor?

Where can I find further MOMENTUM True Wireless 4 product information?

During use…

What do I need to do to get the best experience once I unpack my new MOMENTUM True Wireless 4?

What should I check or adjust to make sure the sound is at its absolute best?

What settings are recommended to get the 7.5-hour playback time that’s specified?

Will the ANC and Transparency Mode feature be affected by windy outdoor conditions?

How do I check for, receive and install firmware updates?

How do I use Auracast™?

When will Bluetooth LE Audio be available?

Do the earbuds switch off automatically when not in use?

What is the difference between the audio resolution modes?

What do I need to consider when switching between the audio resolution modes like “Lossless”, “Low Latency” and “High-Resolution”?

What do I need to consider when using the MOMENTUM True Wireless 4 for gaming?

Why do I see only one battery level for both earbuds in the Sennheiser Smart Control app?

What do I need to consider when charging wireless instead of USB-C?

Do you have a list of places available where I can experience Auracast™? E.g., theatres, cinemas, airports, train stations etc.?

Can I enjoy “Lossless” with any audio source?

How shall I clean and maintain my earbuds?

If a problem occurs…

How can I reset the earbuds?

How can I perform a factory reset?

What should I check if I can’t hear anything when using the earbuds?

What should I check if I can’t pair the earbuds with my Bluetooth device?

What could be a reason why the earbuds may not recharge as usual?

How can I adjust the earbuds to a comfortable volume or make them louder?

How can I do when the phone call quality on my Windows system, e.g. with Teams, is really bad?

How can I do when the audio quality on my Windows system, is poor?

My ANC (Active Noise Cancellation) performance seems to have only limited effect?

What should I check if the audio stream is not “Lossless” even if I activated “Lossless” mode?

During the OTA firmware update an error occurred?

What to do, when I have a Bluetooth multipoint connection to a Windows PC and can’t switch to my other device?

When watching video or gaming on my device is there a recommended way to ensure the sound is in sync with the visuals?

How can I ensure the best fit for the earbuds?

What should I consider if I have issues connecting my smartphone with the Smart Control app?

How do I ensure my voice is picked up clearly during phone calls?

I have disabled the touch controls. Now I am unable to access pairing mode to pair with a new phone. What do I need to do?

How to fix a compatibility issue when pairing the MOMENTUM True Wireless 4 with my Windows 11 PC?

My earbud controls (like call mute, call end etc.) do not work when I am in a Teams call. What do I need to consider?

How to fix a compatibility issue with my Windows PC after updating the software of my MOMENTUM True Wireless 4?

How to fix a compatibility issue when pairing the MOMENTUM True Wireless 4 with my Windows 11 PC?

Has my MOMENTUM True Wireless Bluetooth 5.4 support even if on the packaging Bluetooth 5.3 is mentioned?

What can I do when I experience some hissing noise in transparency mode?

I can’t hear any audio when in a call when using the USB Bluetooth dongle Sennheiser BTD 600, why is this?

When using a Pixel phone, I have issues when reconnecting my MOMENTUM True Wireless 4 automatically with my phone. What do I need to do?

How shall I do when I notice that sound quality of the earbuds is deteriorating due to clogging?

I hear a strong humming noise while initiating a call with a Xiaomi or Redmi phone, what do I need to do?

Which spare parts are available for my MOMENTUM True Wireless 4?

Can I re-use the silicone ear tips and fins spare parts from MOMENTUM True Wireless 3 for the MOMENTUM True Wireless 4?

How can I contact the Sennheiser service department?