Earbuds / Compare

Bowers & Wilkins Pi8 vs Sennheiser MOMENTUM True Wireless 4

A

Product A: Bowers & Wilkins

Pi8

75 of 166 known

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B

Product B: Sennheiser

MOMENTUM True Wireless 4

94 of 166 known

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Every value links to where we found it.

Only differences

ABowers & Wilkins Pi8

BSennheiser MOMENTUM True Wireless 4

General

6 of 8 differ

Series

Pi1Maker product pagebowerswilkins.com/en-us/product/wireless-earbuds/pi8/300965.htmlRead 15 October 2026The page lists the Pi6 as archived in its comparison. The Pi8 is the current Pi flagship.

MOMENTUM3Maker product pageus.sennheiser-hearing.com/products/momentum-true-wireless-4Read 6 October 2026Site menu Headphones by Series lists MOMENTUM Headphones. Product name MOMENTUM True Wireless 4

Model numbersiMaker identifiers for this exact model and its listed variants. Excludes sibling models and other generations.

300965-54-00-309, 300965-58-00-309, 300965-57-00-309, 300965-40-00-309, 300965-77-00-309, 300965-78-00-3091Maker product pagebowerswilkins.com/en-us/product/wireless-earbuds/pi8/300965.htmlRead 15 October 2026US store finishes. The page default finish Midnight Blue is 300965-40-00-309. The store variation data gives Anthracite Black -54, Dove White -58, Jade Green -57, Dark Burgundy -77 and Pale Mauve -78, each ending -00-309.

MTW4, MTW4 R, MTW4 L, MTW4 C, 700365, 700366, 700367, 700441, 7004491Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Cover and specifications: Model MTW4, MTW4 R, MTW4 L, MTW4 C. Article numbers 700365, 700366, 700367, 700441 and 700449 come from the maker's stores2Maker product pageeu.sennheiser-hearing.com/en-de/products/momentum-true-wireless-4Read 6 October 20263Maker product pageus.sennheiser-hearing.com/products/momentum-true-wireless-4Read 6 October 2026Article No. per colour, e.g. 700367 Black Copper

GTIN / EAN

Not available

4260752332408, 4260752332415, 4260752332422, 4260752333351, 42607523333992Maker product pageeu.sennheiser-hearing.com/en-de/products/momentum-true-wireless-4Read 6 October 2026Shopify product data of the EU store: EAN per colour

AnnouncediThe maker's first announcement of this model. This is separate from first retail availability.

21 August 20245Press releasewifihifi.com/bowers-wilkins-launch-all-new-true-wireless-earbudsRead 15 October 2026Launch release as reprinted by WiFi HiFi. Engadget published it on 21 August 2024 and Notebookcheck reported it the same day.

8 January 20245Press releasenewsroom.sennheiser.com/sennheiser-triples-down-at-ces-24Read 6 October 2026Las Vegas, January 8th, 2024: debut at CES

Status

Available1Maker product pagebowerswilkins.com/en-us/product/wireless-earbuds/pi8/300965.htmlRead 15 October 2026The US store lists the Pi8 at 499 USD, above the 399 USD launch price. Every finish showed Out of Stock on 2026-10-15 and the page offers a back-in-stock sign-up. Retailers still list it and the maker has named no successor, so the status stays available.

Available2Maker product pageeu.sennheiser-hearing.com/en-de/products/momentum-true-wireless-4Read 6 October 2026EU maker store sells all five colours with Add to Cart in October 2026. The US maker store marks the product End of Life

PredecessoriThe model this one directly replaced, in the same line, tier and size, as the maker or a trusted review names it.

Not available

Not available

SuccessoriThe model that directly replaced this one, in the same line, tier and size. A revision such as a Slim or OLED model does not count when a next generation exists.

Not available

Sennheiser MOMENTUM True Wireless 511Reviewwhathifi.com/headphones/wireless-earbuds/sennheisers-flagship-earbuds-are-back-to-battle-bose-and-sony-and-they-could-have-an-ace-up-their-sleeveRead 23 October 2026What Hi-Fi calls the MOMENTUM True Wireless 5 the sequel to the MOMENTUM True Wireless 4.

Launch price (US)iThe maker's US launch MSRP for the stated configuration, excluding tax. Current store prices and later discounts do not qualify.

$3995Press releasewifihifi.com/bowers-wilkins-launch-all-new-true-wireless-earbudsRead 15 October 2026Release: available from today at 399 USD, 499 CAD. Tax treatment is not stated. The current US store price of 499 USD is not the launch price.

$299.955Press releasenewsroom.sennheiser.com/sennheiser-triples-down-at-ces-24Read 6 October 2026Available to pre-order on February 15th for $299.95 USD / $429.95 CAD

Launch price (EU)iThe maker's euro launch price for the stated configuration, including VAT as published. Current store prices and later discounts do not qualify.

Not available

€299.996Press releasenewsroom.sennheiser.com/sennheiser-triples-down-at-ces-24-vd4darRead 6 October 2026Available to pre-order on February 15th for £259.99 / €299.99 EUR

MarketsiISO country or region codes where this exact model or variant is sold. A source page's language does not establish availability.

Not available

US, CA, GB, DE2Maker product pageeu.sennheiser-hearing.com/en-de/products/momentum-true-wireless-4Read 6 October 2026DE: EU maker store, prices incl. VAT3Maker product pageus.sennheiser-hearing.com/products/momentum-true-wireless-4Read 6 October 2026US maker store, listed at USD 299.95. Marked End of Life on the page in October 20265Press releasenewsroom.sennheiser.com/sennheiser-triples-down-at-ces-24Read 6 October 2026CA: launch price in CAD6Press releasenewsroom.sennheiser.com/sennheiser-triples-down-at-ces-24-vd4darRead 6 October 2026GB: launch price in GBP

ColoursiThe maker's own colour names

Anthracite Black, Dove White, Jade Green, Midnight Blue, Dark Burgundy, Pale Mauve1Maker product pagebowerswilkins.com/en-us/product/wireless-earbuds/pi8/300965.htmlRead 15 October 2026Six finishes on the US store. The launch release named four of them. Dark Burgundy and Pale Mauve were added later.

Black Graphite, White Silver, Black Copper, Gold, Denim2Maker product pageeu.sennheiser-hearing.com/en-de/products/momentum-true-wireless-4Read 6 October 2026Colour selector: Black Graphite, Black Copper, White Silver, Gold, Denim3Maker product pageus.sennheiser-hearing.com/products/momentum-true-wireless-4Read 6 October 2026Same five colours as the EU store

Segment

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Design

2 of 4 differ

Form factoriIn-ear seals the ear canal with a tip. Semi-in-ear rests in the outer ear without a seal. Open-ear leaves the ear canal unobstructed.

In-ear2Owner's manualbowerswilkins.com/on/demandware.static/-/Library-Sites-bowers_northamerica_shared/default/dw1ab1096c/downloads/Pi8-Manual-v5_2025Dec11_GFP.pdfRead 15 October 2026Manual section 7: Pi8 are designed to seal the ear canal.

In-ear1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Specifications table, PDF page 48 to 49: wearing style True Wireless stereo earbuds, ear coupling ear-canal

Bud shapeiStem describes an extending control or microphone stalk. Stemless describes a compact body without a stalk.

Stemless2Owner's manualbowerswilkins.com/on/demandware.static/-/Library-Sites-bowers_northamerica_shared/default/dw1ab1096c/downloads/Pi8-Manual-v5_2025Dec11_GFP.pdfRead 15 October 2026Manual Diagram 1 and the maker photos show a compact body without a stalk. TechRadar describes a concha-fit design.

Not available

Use one bud aloneiWhich earbud can operate alone. This does not mean two earbuds can play from different sources.

Not available

Either bud1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Page 27: The right or left earbud can be used alone4Maker product pagefirmware.s-consumer-cloud.com/help/products/mtw4/en/faq/index.htmlRead 6 October 2026

RGB lighting

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Drivers and sound

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Drivers per budiAudio transducers in one earbud. Rows distinguish their type, acoustic role and published diameter. Do not count microphones.

ABowers & Wilkins Pi8

Type	Diameter (mm)	Count per earbud
Dynamic	12	1

Source1Maker product pagebowerswilkins.com/en-us/product/wireless-earbuds/pi8/300965.htmlRead 15 October 2026Specification Drive Units: 12mm Carbon Cone. The comparison table says 2 x 12mm Carbon Cone for the pair, so one driver per earbud.

BSennheiser MOMENTUM True Wireless 4

Type	Diameter (mm)	Count per earbud
Dynamic	7	1

Source1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Specifications table, PDF page 48 to 49: transducer principle dynamic, transducer size 7 mm. One transducer size is listed per earbud

Driver typeiPublished transducer technology. High-excursion, composite and neodymium do not by themselves establish a driver type.

Dynamic4Reviewstuff.tv/review/bowers-wilkins-pi8-reviewRead 15 October 2026Review: a single 12mm dynamic unit with the same sort of carbon cone as the Px8. The maker says Carbon Cone drive unit.

Dynamic1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Specifications table, PDF page 48 to 49: transducer principle dynamic

Driver sizeiLargest explicitly published circular driver diameter in one earbud. A rectangular driver width is not a diameter.

12mm=CalculatedFrom Drivers per bud

7mm=CalculatedFrom Drivers per bud

Drivers per budiTotal audio transducers in one earbud, summed from explicit driver quantities. A row with an unknown quantity makes the total unknown.

1=CalculatedFrom Drivers per bud

1=CalculatedFrom Drivers per bud

Diaphragm material

Carbon Cone1Maker product pagebowerswilkins.com/en-us/product/wireless-earbuds/pi8/300965.htmlRead 15 October 2026Maker name for the diaphragm technology. The page does not give the exact material.

Not available

Frequency responseiPublished acoustic frequency response of the earbuds. Codec transmission bandwidth alone does not qualify. Conditions belong in the source note.

Not available

Min5 HzMax21 kHz1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Specifications table, PDF page 48 to 49: 5 Hz to 21 kHz

Impedance

Not available

Not available

SensitivityiPublished acoustic sensitivity. The electrical reference and frequency must be stated in sensitivity_reference or the source note.

Not available

107dB1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Specifications table, PDF page 48 to 49: sound pressure level (SPL) 107 dB (1 kHz/1 mW)

Sensitivity reference

Not available

Per 1 mW1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026107 dB at 1 kHz/1 mW

Max sample rateiHighest supported audio sample rate under the codec and source-device conditions in the source note. This does not establish lossless playback.

96kHz4Reviewstuff.tv/review/bowers-wilkins-pi8-reviewRead 15 October 2026Review: aptX Adaptive for 24/96 playback. The launch release says the same. A compatible source is needed and the case retransmits in aptX Adaptive up to 24-bit/96kHz.

96kHz1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Page 38: High Resolution Audio mode via aptX Adaptive transmits at 96 kHz and 24 bits. Needs an aptX Adaptive source

Max bit depthiHighest supported audio bit depth under the codec and source-device conditions in the source note. Bluetooth version alone does not establish this.

24bits2Owner's manualbowerswilkins.com/on/demandware.static/-/Library-Sites-bowers_northamerica_shared/default/dw1ab1096c/downloads/Pi8-Manual-v5_2025Dec11_GFP.pdfRead 15 October 2026Specifications: True 24-bit audio connection. The codec is not named there. The launch release gives aptX Adaptive at 24-bit/96kHz. aptX Lossless itself is a 16-bit lossless mode.

24bits1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Page 38: High Resolution Audio mode via aptX Adaptive transmits at 96 kHz and 24 bits. Needs an aptX Adaptive source

Adaptive EQiAn inner mic tunes the sound to your ear in real time

Not available

Not available

Personalised soundiA profile from a hearing test or ear scan

Not available

Yes4Maker product pagefirmware.s-consumer-cloud.com/help/products/mtw4/en/faq/index.htmlRead 6 October 2026Sound Personalization: guided listening test developed with the Fraunhofer Institute

Onboard EQ

Not available

Yes1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Page 38: The sound effects are stored in the earbuds and stay active with other Bluetooth devices

Custom EQ bandsiNumber of independently adjustable custom equalizer frequency bands. Availability may require current firmware, an app or a compatible device.

51Maker product pagebowerswilkins.com/en-us/product/wireless-earbuds/pi8/300965.htmlRead 15 October 2026Specification: 5-band customisable EQ plus TrueSound mode.

52Maker product pageeu.sennheiser-hearing.com/en-de/products/momentum-true-wireless-4Read 6 October 20265-band equalizer

EQ presetsiNamed equalizer sound presets. Noise-control modes and spatial-audio modes are separate features.

Not available

Not available

Volume limit

Not available

Not available

Spatial audio

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Spatial audioiNamed spatial or surround audio processing supported with the source and platform conditions stated in the source note.

Not available

Not available

Head trackingiSpatial audio changes with head movement. Static spatial processing alone does not qualify. Compatible device or content requirements belong in the source note.

No9Measurementsoundguys.com/bowers-wilkins-pi8-review-124027Read 15 October 2026Review cons: no spatial audio or head tracking features. TechRadar also says there is no proprietary spatial audio processing.

Not available

Noise cancelling

4 of 11 differ

Active noise cancelling

Yes1Maker product pagebowerswilkins.com/en-us/product/wireless-earbuds/pi8/300965.htmlRead 15 October 2026

Yes1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026

ANC typeiFeedforward uses exterior microphones. Feedback uses interior microphones. Hybrid uses both. Adaptive control is separate from microphone placement.

Not available

Hybrid1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Specifications table, PDF page 48 to 49: Hybrid Adaptive ANC technology

ANC microphones in both earbudsiPhysical microphones used by ANC across the pair. A shared call and ANC microphone counts once. Case microphones and vibration sensors are excluded.

Not available

44Maker product pagefirmware.s-consumer-cloud.com/help/products/mtw4/en/faq/index.htmlRead 6 October 2026The advanced system uses four microphones to continuously monitor ambient noise

Adaptive ANCiANC strength or calibration adjusts automatically to noise, fit or ear acoustics. The source note states the adjustment conditions.

Yes1Maker product pagebowerswilkins.com/en-us/product/wireless-earbuds/pi8/300965.htmlRead 15 October 2026Page: noise cancellation that automatically adapts to your surroundings. TechRadar says there is no adaptive ANC option and no way to tweak the ANC level. The maker wins, but the adaptive behaviour is not user-visible.

Yes1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Page 31: Adaptive mode reduces noise depending on the noise conditions

ANC levelsiNumber of selectable ANC strength levels. Excludes ANC off, transparency and activity profiles unless they explicitly set distinct strength levels.

Not available

Not available

ANC attenuation (claimed)iManufacturer maximum claimed noise attenuation. Frequency and measurement conditions belong in the source note. This is not reviewer-measured overall attenuation.

Not available

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Transparency mode

Yes2Owner's manualbowerswilkins.com/on/demandware.static/-/Library-Sites-bowers_northamerica_shared/default/dw1ab1096c/downloads/Pi8-Manual-v5_2025Dec11_GFP.pdfRead 15 October 2026Manual 2.4: ambient Pass-Through mode lets in some external sound.

Yes1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026

Adjustable transparency

No4Reviewstuff.tv/review/bowers-wilkins-pi8-reviewRead 15 October 2026Review: noise cancelling is a basic toggle with no way to adjust the level of passthrough.

Yes1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Page 32: The intensity of Transparency Mode can be adjusted in the app

Automatic ANC and transparency blendiAutomatically blends active cancellation with ambient sound. Automatic activity-based switching between separate modes alone does not qualify.

Not available

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Conversation detection

Not available

Not available

Wind noise reductioniA documented physical design or processing feature for reducing wind noise. The source note distinguishes mesh or shape changes from selectable processing.

Not available

Yes1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Page 31: selectable Anti Wind ANC mode reduces wind or movement noise. Processing mode, not a mesh

Measured

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Frequency response notes (measured)iMeasured by a reviewer, not claimed by the maker

Warm sound signature with emphasised bass. SoundGuys measured the Pi8 on firmware 1.0.16.18 against its own preference curve. Bass runs about 5 dB above the target from 20 to 50 Hz, the response peaks about 9 dB above the target at 3.15 kHz and sits about 14 dB below the target at 20 kHz. These are local peaks, not regional averages.9Measurementsoundguys.com/bowers-wilkins-pi8-review-124027Read 15 October 2026SoundGuys lab response table for the Pi8 on the SoundGuys Headphone Preference Curve, measured on a B&K 5128 fixture per its How We Test method. Values read from the product page lab data. SoundGuys lists the signature as warm and says the Pi8 have more bass emphasis than expected.

Warm sound signature10Measurementrtings.com/headphones/reviews/sennheiser/momentum-true-wireless-4Read 6 October 2026Sound Signature: Warm. Full measurements are members only and were not read

Bass amount (measured)iDeviation from the review source target in the bass range. Positive means more bass. Target, test method and settings belong in the source note.

Not available

3dB10Measurementrtings.com/headphones/reviews/sennheiser/momentum-true-wireless-4Read 6 October 2026Emphasized (3 dB), test bench 2.3

Treble amount (measured)iDeviation from the review source target in the treble range. Positive means more treble. Values from different targets may not be directly comparable.

Not available

-4dB10Measurementrtings.com/headphones/reviews/sennheiser/momentum-true-wireless-4Read 6 October 2026Underemphasized (-4 dB), test bench 2.3

Deviation from target (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Consistency between fittings (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Harmonic distortion (measured)iMeasured by a reviewer, not claimed by the maker

Not available

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Sound leakage (measured)iMeasured by a reviewer, not claimed by the maker

Not available

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Noise isolation (measured)iMeasured by a reviewer, not claimed by the maker

Not available

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Noise isolation, best (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Passive isolation (measured)iMeasured by a reviewer, not claimed by the maker

Not available

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Call quality notes (measured)iMeasured by a reviewer, not claimed by the maker

Voices are reproduced accurately in SoundGuys recordings. Background noise rejection is not exceptional, so some environmental noise leaks through, but each voice stays intelligible. The recordings cover ideal, office, street, windy and reverberant conditions.9Measurementsoundguys.com/bowers-wilkins-pi8-review-124027Read 15 October 2026SoundGuys microphone demonstrations in ideal, office, street, windy and reverberant conditions. The review text says the microphones work well in a variety of environments but background noise rejection is not exceptional. No numeric result is stored.

Not available

Mic low-frequency extension (measured)iMeasured by a reviewer, not claimed by the maker

Not available

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Mic high-frequency extension (measured)iMeasured by a reviewer, not claimed by the maker

Not available

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Mic speech-to-noise ratio (measured)iMeasured by a reviewer, not claimed by the maker

Not available

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Latency (measured)iMeasured by a reviewer, not claimed by the maker

Not available

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Bluetooth latency, worst (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

2.4 GHz latency, worst (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Latency in game mode (measured)iThe best case the buds can reach. Measured by a reviewer

Not available

Not available

Battery life (measured)iReviewer-tested operation from one full charge of the earbuds. Excludes case recharges. ANC, codec, connection, volume and tested edition belong in the row or source note.

ABowers & Wilkins Pi8

ANC	Hours (h)
Yes	5.17
No	8.5

Source6Reviewtechradar.com/audio/earbuds-airpods/bowers-and-wilkins-pi8-reviewRead 15 October 2026Review: closer to 8.5 hours from a single charge with ANC off in the reviewer's testing. Codec, volume and source are not stated, so the figure is approximate. The maker claim of 6.5 hours is with ANC on.9Measurementsoundguys.com/bowers-wilkins-pi8-review-124027Read 15 October 20265 h 10 min with ANC on, stored as 31/6 hours. SoundGuys uses music peaking at 75 dB SPL, firmware 1.0.16.18 and app 2.7.1, tested over two weeks on a unit supplied by the maker. Codec is not stated. This is earbud-only runtime and is below the 6.5 hour maker claim. The ANC off row is from TechRadar and is approximate.

BSennheiser MOMENTUM True Wireless 4

Hours (h)
7.75

Source9Reviewsoundguys.com/sennheiser-momentum-true-wireless-4-review-111429Read 6 October 2026Standardized battery test: 7 hours 45 minutes of music, peaking at 75 dB. Firmware 5.3.5. ANC state not stated

Longest tested use per chargeiHighest earbuds-only duration among stored reviewer tests. Modes and settings may differ between tests and products.

8.5h=CalculatedFrom Battery life (measured)

7.75h=CalculatedFrom Battery life (measured)

Battery life with case (measured)iReviewer-tested total including earbuds and case recharges. Do not calculate this by multiplying one-charge runtime by claimed recharge count.

Not available

Not available

Full charge time (measured)iBuds in the case, 0 to 100 %. Measured by a reviewer

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Weight per bud (measured)iMeasured by a reviewer, not claimed by the maker

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Microphones and calls

5 of 7 differ

Voice microphones in both earbudsiPhysical call and beamforming microphones across the pair. Excludes case microphones and vibration sensors. Shared ANC microphones can also count here when used for calls.

42Owner's manualbowerswilkins.com/on/demandware.static/-/Library-Sites-bowers_northamerica_shared/default/dw1ab1096c/downloads/Pi8-Manual-v5_2025Dec11_GFP.pdfRead 15 October 2026Manual section 7: each earbud contains two microphones for picking up your voice during calls. Stored as 4 across the pair. The third microphone per earbud in the specification is for ANC.

62Maker product pageeu.sennheiser-hearing.com/en-de/products/momentum-true-wireless-4Read 6 October 2026Its high-quality 6-mic system ensures you can be heard perfectly during calls

All microphones in both earbudsiEvery physical microphone across the pair, including call and ANC microphones. Shared microphones count once. Excludes the charging case and voice vibration sensors.

61Maker product pagebowerswilkins.com/en-us/product/wireless-earbuds/pi8/300965.htmlRead 15 October 2026Specification Microphones: 3 per earbud for telephony and ANC. Stored as 6 across the pair.

61Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Specifications table, PDF page 48 to 49: 3 microphones per earbud (speech and ANC), MEMS

Bone conduction voice sensoriA dedicated bone or jaw conduction sensor for detecting speech vibrations. A microphone or speech-detecting accelerometer alone does not prove this architecture.

Not available

Not available

Mic noise reduction

Not available

AI4Maker product pagefirmware.s-consumer-cloud.com/help/products/mtw4/en/faq/index.htmlRead 6 October 2026AI-supported voice pickup (firmware update required)

Call audio bandwidthiHighest supported call-audio bandwidth. Compatible phone, operating system, call app or network requirements belong in the source note.

Not available

Super wideband4Maker product pagefirmware.s-consumer-cloud.com/help/products/mtw4/en/faq/index.htmlRead 6 October 2026Supports an advanced call mode called Super Wideband Audio

Mic mute controliAn earbud control that mutes the microphone during calls. Includes touch or pressure gestures and physical buttons. Phone/app-only controls do not qualify.

Not available

Yes1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Page 36: Tap the right or left touch panel 1x during a call to mute

SidetoneiHear your own voice in calls

No6Reviewtechradar.com/audio/earbuds-airpods/bowers-and-wilkins-pi8-reviewRead 15 October 2026Review: the lack of sidetone-type tech to boost or minimise your own or the caller's voice.

Yes3Maker product pageus.sennheiser-hearing.com/products/momentum-true-wireless-4Read 6 October 2026A 6-mic system, adjustable sidetone, and call virtualization for clear calls

Connectivity

8 of 18 differ

Chip

Qualcomm QCC51817Reviewtomsguide.com/audio/earbuds/bowers-and-wilkins-pi8-review-comfy-fit-incredible-soundRead 15 October 2026Review: QCC5181 chipset alongside a discrete DAC and amp combo. The maker and other reviewers say only a latest-generation Qualcomm chipset. Only Tom's Guide names the part.

Qualcomm S5 Sound Gen 25Press releasenewsroom.sennheiser.com/sennheiser-triples-down-at-ces-24Read 6 October 2026Built on the Qualcomm S5 Sound Gen 2 platform and Snapdragon Sound Technology

Connections

Bluetooth2Owner's manualbowerswilkins.com/on/demandware.static/-/Library-Sites-bowers_northamerica_shared/default/dw1ab1096c/downloads/Pi8-Manual-v5_2025Dec11_GFP.pdfRead 15 October 2026

Bluetooth1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026

Bluetooth

5.41Maker product pagebowerswilkins.com/en-us/product/wireless-earbuds/pi8/300965.htmlRead 15 October 2026Specification: Bluetooth 5.4 with aptX Lossless technology.

5.41Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Specifications table, PDF page 48 to 49: Bluetooth 5.4 certified, class 1. FAQ: some early packaging says 5.3

Bluetooth codecs

aptX Lossless, aptX Adaptive, aptX, AAC, SBC1Maker product pagebowerswilkins.com/en-us/product/wireless-earbuds/pi8/300965.htmlRead 15 October 2026

SBC, AAC, aptX, aptX Adaptive, aptX Lossless, LC31Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Specifications table, PDF page 48 to 49: aptX, aptX Adaptive/Lossless, AAC, SBC, Auracast Broadcast Audio, LC3

Bluetooth profiles

A2DP v1.3.2, AVRCP v1.6.2, HFP v1.8, HSP v1.2, BLE GATT2Owner's manualbowerswilkins.com/on/demandware.static/-/Library-Sites-bowers_northamerica_shared/default/dw1ab1096c/downloads/Pi8-Manual-v5_2025Dec11_GFP.pdfRead 15 October 2026Specifications: A2DP v1.3.2, AVRCP v1.6.2, HFP v1.8, HSP v1.2 and BLE GATT.

AVRCP, A2DP, HFP, TMAP, PBP1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Specifications table, PDF page 48 to 49: AVRCP, A2DP, HFP, TMAP, PBP

LE Audio

No2Owner's manualbowerswilkins.com/on/demandware.static/-/Library-Sites-bowers_northamerica_shared/default/dw1ab1096c/downloads/Pi8-Manual-v5_2025Dec11_GFP.pdfRead 15 October 2026No LE Audio profile is listed in the specifications. Stuff says there is no LC3 or Bluetooth LE audio on board.

Yes1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Page 20: Bluetooth 5.4, LE Audio and Auracast broadcast audio certified. Launch firmware lacked LE Audio, added by a firmware update

Auracast

Not available

Yes1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Pages 21 to 26: Auracast transmitters are selected in the Smart Control app. Added by a firmware update

MultipointiConcurrent Bluetooth connections to multiple source devices. Pairing memory and switching through a manufacturer account alone do not qualify.

Yes1Maker product pagebowerswilkins.com/en-us/product/wireless-earbuds/pi8/300965.htmlRead 15 October 2026Specification: Multipoint connectivity. The manual says two devices at once.

Yes1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 20264Maker product pagefirmware.s-consumer-cloud.com/help/products/mtw4/en/faq/index.htmlRead 6 October 2026Can be connected to two of the paired devices simultaneously

Multipoint devicesiMaximum source devices concurrently connected by Bluetooth, not the number remembered in pairing history.

22Owner's manualbowerswilkins.com/on/demandware.static/-/Library-Sites-bowers_northamerica_shared/default/dw1ab1096c/downloads/Pi8-Manual-v5_2025Dec11_GFP.pdfRead 15 October 2026Manual 5.3: Pi8 supports multipoint and can be connected to two devices simultaneously. Only one device at a time can play audio or make calls.

21Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Specifications table, PDF page 48 to 49: number of active connections 2

Multipoint with LDACiMany buds turn multipoint off on LDAC

Not available

Not available

Paired devices rememberediMaximum remembered Bluetooth source pairings. This is separate from simultaneous multipoint connections.

Not available

61Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Page 20: saves the connection profiles of up to six Bluetooth devices

Automatic switching between own devicesiThrough the maker's account

Not available

Not available

Fast pairing

Google Fast Pair2Owner's manualbowerswilkins.com/on/demandware.static/-/Library-Sites-bowers_northamerica_shared/default/dw1ab1096c/downloads/Pi8-Manual-v5_2025Dec11_GFP.pdfRead 15 October 2026Manual 5.1.2: Android devices running Marshmallow 6.0 or later that support the Google Fast Pair Service pair through a pop-up.

Not available

Audio sharingiShare one stream with a second pair

Not available

Not available

Wireless range (claimed)

10m8Reviewwhathifi.com/reviews/bowers-and-wilkins-pi8Read 15 October 2026Review: transmission between the earbuds has been reworked, including an increase in range to 10m through a new antenna. This is the maker claim as relayed by the reviewer. The reviewer saw two dropouts in testing.

Not available

Wireless receiveri2.4 GHz dongle

Not available

Not available

Receiver connector

Not available

Not available

Simultaneous 2.4 GHz and Bluetooth audioiBoth connection types can play audio together. Quick switching between independent modes does not qualify.

Not available

Not available

Latency

3 of 3 differ

Low latency mode

Not available

Yes1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Page 39: Low Latency mode in the Smart Control app, for all Bluetooth codecs

Claimed latency

ABowers & Wilkins Pi8

Not available

BSennheiser MOMENTUM True Wireless 4

Connection	Mode	Latency (ms)
Bluetooth	Snapdragon Sound in Bluetooth LE Audio mode	20

Source4Maker product pagefirmware.s-consumer-cloud.com/help/products/mtw4/en/faq/index.htmlRead 6 October 2026Gaming with up to approx. 20 ms latency needs an audio device that supports Snapdragon Sound in Bluetooth LE Audio mode

Lowest claimed latency

Not available

20ms=CalculatedFrom Claimed latency

Compatibility

3 of 4 differ

PlatformsiPlatforms with documented audio support. App availability and advanced features can be more limited. Edition-specific support is listed in variants.

iOS, Android, Windows, macOS2Owner's manualbowerswilkins.com/on/demandware.static/-/Library-Sites-bowers_northamerica_shared/default/dw1ab1096c/downloads/Pi8-Manual-v5_2025Dec11_GFP.pdfRead 15 October 2026Manual 5.1: iPhone, Android and Mac or PC pairing. The note on Windows 10 describes the Stereo and Hands-Free profiles. Section 8 covers streaming from a Mac over USB.

Android, iOS, Windows2Maker product pageeu.sennheiser-hearing.com/en-de/products/momentum-true-wireless-4Read 6 October 2026App support: Sennheiser Smart Control app for iOS and Android4Maker product pagefirmware.s-consumer-cloud.com/help/products/mtw4/en/faq/index.htmlRead 6 October 2026Windows: FAQ covers Windows PC audio profiles MOMENTUM TW4 Stereo and Hands-Free

Connection per platformiDocumented audio connection for each platform. USB-C phone routes require a compatible port. Platform edition and microphone restrictions belong in source notes or feature requirements.

Not available

Not available

Features that need a specific deviceiDevice, operating system, firmware, codec, content, account or region requirements for a named feature.

ABowers & Wilkins Pi8

Feature	Needs
Google Fast Pair	Android device running Marshmallow 6.0 or later that supports the Google Fast Pair Service.
Audio retransmission from the charging case	Connect an analogue or USB source to the case with the supplied 3.5 mm or USB-C cable. The case only sends the source audio to the earbuds. Earbud microphone signals are not sent back to the case.

Source2Owner's manualbowerswilkins.com/on/demandware.static/-/Library-Sites-bowers_northamerica_shared/default/dw1ab1096c/downloads/Pi8-Manual-v5_2025Dec11_GFP.pdfRead 15 October 2026

BSennheiser MOMENTUM True Wireless 4

Feature	Needs
Lossless Audio mode (aptX Lossless, 16 bit/44.1 kHz)	Snapdragon Sound certified smartphone or audio source that supports aptX Adaptive Lossless
High Resolution Audio mode (24 bit/96 kHz)	Audio source that supports aptX Adaptive and audio material in High Resolution quality
Latency of approx. 20 ms	Audio device that supports Snapdragon Sound in Bluetooth LE Audio mode
Eco mode	Devices that support aptX transmission
Bluetooth LE Audio, LC3 and Auracast	Firmware update

Source1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Pages 38 to 39 for Eco, High Resolution and Lossless modes4Maker product pagefirmware.s-consumer-cloud.com/help/products/mtw4/en/faq/index.htmlRead 6 October 2026Lossless needs a Snapdragon Sound certified source with aptX Adaptive Lossless. LE Audio and Auracast came by firmware update

Official licence

Made for iPhone2Owner's manualbowerswilkins.com/on/demandware.static/-/Library-Sites-bowers_northamerica_shared/default/dw1ab1096c/downloads/Pi8-Manual-v5_2025Dec11_GFP.pdfRead 15 October 2026Specifications: Apple MFi Made For iPhone support.

Not available

Battery and charging

9 of 13 differ

Battery per budiBattery cell capacity of one earbud. The source note states typical or rated capacity. Charging input current is not capacity.

Not available

Not available

User-replaceable earbud batteryiThe maker documents normal battery replacement by the user with its approved procedure and tools. Service or recycling disassembly does not count.

Not available

Not available

Claimed battery lifeiManufacturer maximum runtime under the stated mode, codec and spatial processing state. Name the spatial or immersive processing mode and other conditions in source notes. Omit unspecified settings. with_case false means one charge of the earbuds. true means earbuds plus case recharges.

ABowers & Wilkins Pi8

Mode	Includes case recharges	Hours (h)
ANC on	No	6.5
ANC on	Yes	20

Source1Maker product pagebowerswilkins.com/en-us/product/wireless-earbuds/pi8/300965.htmlRead 15 October 2026Specification: up to 6.5 hours for earbuds with ANC on, plus 13.5 hours from the charging case. The 20 hour total is stated in the manual and the launch release says all figures are quoted with ANC on. Codec, volume and spatial settings are not stated. The information sheet footnote says pre-production hardware was tested with a smartphone.

BSennheiser MOMENTUM True Wireless 4

Mode	Codec	Includes case recharges	Hours (h)
ANC off	AAC	No	7.5
ANC on	Not available	No	7
ANC off	AAC	Yes	30

Source2Maker product pageeu.sennheiser-hearing.com/en-de/products/momentum-true-wireless-4Read 6 October 2026Battery lifespan: up to 7.5 hrs with earbuds (ANC off), up to 7.0 hrs (ANC on), up to 30 hrs overall with charging case. Test condition iPhone, mid volume level 85 dB. The manual pairs 7.5 h with ANC activated, which reverses ANC on and off4Maker product pagefirmware.s-consumer-cloud.com/help/products/mtw4/en/faq/index.htmlRead 6 October 20267.5 h and 30 h total confirmed with iPhone within 1 m, AAC codec, medium volume, ANC and Transparency Mode off, custom EQ off

Longest claimed use per chargeiHighest earbuds-only runtime among all stored modes. This can be ANC off, Hearing Aid, heart-rate or call use. Read the battery table and source conditions.

6.5h=CalculatedFrom Claimed battery life

7.5h=CalculatedFrom Claimed battery life

Playback per charge with ANC (claimed)iHighest claimed earbuds-only playback with ANC enabled. Codec and spatial-audio conditions belong in the source note.

6.5h=CalculatedFrom Claimed battery life

7h=CalculatedFrom Claimed battery life

Playback per charge without ANC (claimed)iHighest claimed earbuds-only playback with ANC disabled. Codec and volume conditions belong in the source note.

Not available

7.5h=CalculatedFrom Claimed battery life

Total with case (claimed)iHighest claimed runtime including the initial earbud charge and all case recharges. It is not the case recharge runtime alone.

20h=CalculatedFrom Claimed battery life

30h=CalculatedFrom Claimed battery life

Total with case and ANC (claimed)iClaimed total playback with ANC, including the initial earbud charge and case recharges.

20h=CalculatedFrom Claimed battery life

Not available

Talk time (claimed)

Not available

Not available

Full charge time, budsiTime to charge discharged earbuds to full in the case. Excludes charging the case itself or a combined buds-and-case result.

Not available

Not available

Charging guidanceiPublished charging guidance or estimates that do not separate earbuds and case. Preserve the maker’s component scope and limits. Do not assign an unspecified or combined estimate to a component-specific numeric field.

The specification lists charge time as 2 hours and does not name the earbuds or the case. The manual says to allow up to 3 hours to fully charge.2Owner's manualbowerswilkins.com/on/demandware.static/-/Library-Sites-bowers_northamerica_shared/default/dw1ab1096c/downloads/Pi8-Manual-v5_2025Dec11_GFP.pdfRead 15 October 2026Specifications: Charge time = 2 hours. Manual section 4: allow up to 3 hours to fully charge.

Not available

Quick charge timeiCharge duration corresponding to quick_charge_playback_h. Source note states earbuds-only or case-inclusive charging and playback settings.

15min1Maker product pagebowerswilkins.com/en-us/product/wireless-earbuds/pi8/300965.htmlRead 15 October 2026Specification: 15-minute charge = 2 hours playback.

8min1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Page 16 and specifications: approx. 8 minutes of charging for approx. 1 hour of music playback

Earbud playback after quick chargeiEarbuds-only runtime after quick_charge_min of charging. A claimed case-inclusive total does not qualify. ANC, codec and volume conditions belong in the source note.

2h1Maker product pagebowerswilkins.com/en-us/product/wireless-earbuds/pi8/300965.htmlRead 15 October 2026Same row. ANC, codec and volume conditions are not stated.

1h1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Page 16 and specifications: approx. 8 minutes of charging for approx. 1 hour of music playback

Charging case

2 of 10 differ

Case batteryiCharging-case battery cell capacity. The source note distinguishes typical, rated and output capacity. USB output capacity alone does not qualify.

Not available

820mAh1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Specifications table, PDF page 48 to 49: charging case 3.6 V, 820 mAh, 2.952 Wh2Maker product pageeu.sennheiser-hearing.com/en-de/products/momentum-true-wireless-4Read 6 October 2026Battery type: charging case 820 mAh

User-replaceable case batteryiThe maker documents normal case battery replacement by the user with its approved procedure and tools. Service or recycling disassembly does not count.

Not available

Not available

Case charging port

USB-C2Owner's manualbowerswilkins.com/on/demandware.static/-/Library-Sites-bowers_northamerica_shared/default/dw1ab1096c/downloads/Pi8-Manual-v5_2025Dec11_GFP.pdfRead 15 October 2026Manual 4: USB-C socket on the charging case.

USB-C1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026

Case full charge timeiBy cable, 0 to 100 %. A time the maker gives with the earbuds inside the case counts, and the source note says so.

Not available

Not available

Wireless charging

Yes1Maker product pagebowerswilkins.com/en-us/product/wireless-earbuds/pi8/300965.htmlRead 15 October 2026Specification Wireless Charging Support: Yes.

Yes1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026

Wireless standardsiDocumented case charging standards or supported chargers. Magnetic alignment alone does not establish Qi2 certification.

Qi4Reviewstuff.tv/review/bowers-wilkins-pi8-reviewRead 15 October 2026Review: the case can be topped up wirelessly on a Qi pad. The maker names no standard.

Qi1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Specifications table, PDF page 48 to 49: Qi wireless charging

Wireless charging poweriHighest wireless charging input the maker states for the case. The output of a charging pad does not count.

Not available

Not available

Speaker in caseiAn audio speaker physically in the charging case, for locating or status sounds. A microphone in the case is separate.

Not available

Not available

Screen on case

Not available

Not available

Case works as audio transmitteriCase relays external source audio through USB or an analog audio input. A case microphone for recording or calls does not qualify.

Yes2Owner's manualbowerswilkins.com/on/demandware.static/-/Library-Sites-bowers_northamerica_shared/default/dw1ab1096c/downloads/Pi8-Manual-v5_2025Dec11_GFP.pdfRead 15 October 2026Manual section 8: the case retransmits audio from a 3.5 mm analogue or USB source to the earbuds.

No9Reviewsoundguys.com/sennheiser-momentum-true-wireless-4-review-111429Read 6 October 2026You can't use the charging case as a transmitter

Controls

2 of 5 differ

ControlsiPressure is a force sensor that does not move, such as a stem you squeeze. Button is a key that moves when pressed.

Touch2Owner's manualbowerswilkins.com/on/demandware.static/-/Library-Sites-bowers_northamerica_shared/default/dw1ab1096c/downloads/Pi8-Manual-v5_2025Dec11_GFP.pdfRead 15 October 2026Manual 2.2: touch-sensitive multi-function button area on the top face of each earbud.

Touch1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Pages 29 to 36: touch control panels, tap and touch-and-hold gestures

Earbud volume controliHow earbud controls adjust volume, including a voice command if supported. Phone or app controls alone do not qualify.

Touch6Reviewtechradar.com/audio/earbuds-airpods/bowers-and-wilkins-pi8-reviewRead 15 October 2026Review: on-ear volume control by tap and hold on either earbud, left down and right up. It replaces the noise mode and voice assistant gestures.

Touch1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Pages 29 to 30: touch and hold the right panel for louder, the left panel for quieter

Gestures

Single tap: play or pause, answer call, Double tap: next track, Triple tap: previous track, Double tap and hold: end call, Touch and hold left earbud for 1 second: switch noise cancelling and pass-through, Touch and hold right earbud for 1 second: voice assistant, Touch and hold either earbud: volume, left down and right up, when set in the app2Owner's manualbowerswilkins.com/on/demandware.static/-/Library-Sites-bowers_northamerica_shared/default/dw1ab1096c/downloads/Pi8-Manual-v5_2025Dec11_GFP.pdfRead 15 October 2026Manual Diagram 2 symbols for the taps and Quick Start Guide: hold the left earbud for noise cancelling and pass-through, the right earbud for voice assistant. The double tap and hold symbol is read as end call from the red phone icon. Volume on tap and hold is from TechRadar.

Tap 1x, Tap 2x, Tap 3x, Touch and hold1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Pages 29 to 36: tap 1x, 2x, 3x and touch and hold

Remappable controls

Yes2Owner's manualbowerswilkins.com/on/demandware.static/-/Library-Sites-bowers_northamerica_shared/default/dw1ab1096c/downloads/Pi8-Manual-v5_2025Dec11_GFP.pdfRead 15 October 2026Manual 2.3: the app can customise the multi-function button behaviour.

Yes1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Page 39: control functions can be customized in the Smart Control app

Voice assistant

Not available

Siri, Google Assistant1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Page 33: Siri, Google Assistant or similar, depending on the device

Sensors and health

2 of 9 differ

In-ear detection

Yes2Owner's manualbowerswilkins.com/on/demandware.static/-/Library-Sites-bowers_northamerica_shared/default/dw1ab1096c/downloads/Pi8-Manual-v5_2025Dec11_GFP.pdfRead 15 October 2026Manual 2.5: wear sensors in both earbuds pause audio when an earbud is removed. They can be switched off in the app.

Yes1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Page 7: infra-red proximity sensor. Page 33: Smart Pause stops playback when an earbud is removed

Sensors

Not available

Infra-red proximity sensor1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Page 7: product overview lists an infra-red proximity sensor

Heart rate sensor

Not available

Not available

Skin temperature sensingiA documented skin temperature sensor. This is separate from the operating temperature range or a heart-rate sensor.

Not available

Not available

Hearing aid featureiAmplification for mild to moderate hearing loss

Not available

Not available

Medical clearances

Not available

Not available

Hearing testiA documented hearing assessment feature, including consumer sound-personalization tests. Medical diagnostic clearance must be stated separately.

No6Reviewtechradar.com/audio/earbuds-airpods/bowers-and-wilkins-pi8-reviewRead 15 October 2026Review: there are no hearing tests for creating personalised sound profiles.

Yes4Maker product pagefirmware.s-consumer-cloud.com/help/products/mtw4/en/faq/index.htmlRead 6 October 2026Consumer sound-personalization listening test in the Smart Control app. Not a medical test

Hearing protectioniLimits sudden loud sounds

Not available

Not available

Health features

Not available

Not available

Fit and durability

2 of 7 differ

Ear tips includediTip sizes supplied with the product, including the pair fitted to the earbuds. Do not list separately sold sizes as included.

XS, S, M, L1Maker product pagebowerswilkins.com/en-us/product/wireless-earbuds/pi8/300965.htmlRead 15 October 2026Accessories: Extra Small / Small / Medium / Large ear tips. The manual says medium tips are pre-fitted.

XS, S, M, L1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Package contents page 5: silicone ear adapters XS, S, M (pre-mounted) and L

Ear tip materials

Silicone8Reviewwhathifi.com/reviews/bowers-and-wilkins-pi8Read 15 October 2026Review: four different sizes of silicone eartip in the box. TechRadar also says silicone.

Silicone1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026

StabilisersiPhysical stabilizing fittings or structures. Stability bands are separate from fins, wings and ear hooks.

Not available

Fins1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Package contents page 5: silicone ear fins S, M (pre-mounted) and L

Ear tip fit test

No6Reviewtechradar.com/audio/earbuds-airpods/bowers-and-wilkins-pi8-reviewRead 15 October 2026Review: there are no ear-tip fit tests. What Hi-Fi? says the app has no eartip fit test.

Yes1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Page 13: Fit Test function in the Smart Control app

Dust and water rating, buds

IP541Maker product pagebowerswilkins.com/en-us/product/wireless-earbuds/pi8/300965.htmlRead 15 October 2026Specification Water Resistance: IP54 (earbuds).

IP541Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Page 3 and specifications: earbuds IP54. The charging case is not splash waterproof

Dust and water rating, case

Not available

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Water resistance depth

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Software

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Companion app

Bowers & Wilkins Music1Maker product pagebowerswilkins.com/en-us/product/wireless-earbuds/pi8/300965.htmlRead 15 October 2026Page: Bowers & Wilkins Music app for setup and control.

Sennheiser Smart Control1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026

App platforms

iOS, Android2Owner's manualbowerswilkins.com/on/demandware.static/-/Library-Sites-bowers_northamerica_shared/default/dw1ab1096c/downloads/Pi8-Manual-v5_2025Dec11_GFP.pdfRead 15 October 2026Manual 6: the app is free on iOS and Android.

Android, iOS1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026

User firmware updates

Yes2Owner's manualbowerswilkins.com/on/demandware.static/-/Library-Sites-bowers_northamerica_shared/default/dw1ab1096c/downloads/Pi8-Manual-v5_2025Dec11_GFP.pdfRead 15 October 2026Manual 6.2: software updates through the app.

Yes1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026

Finding network

Not available

Not available

Precision findingiUWB in the case

Not available

Not available

Live translation

Not available

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Dimensions and weight

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Weight per budiMass of one earbud. Tip size and approximate values belong in the source note. Do not store pair or case-inclusive mass.

7g(0.2 oz)1Maker product pagebowerswilkins.com/en-us/product/wireless-earbuds/pi8/300965.htmlRead 15 October 2026Specification Weight: Earbuds 7g (each).

6g(0.2 oz)1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Specifications table, PDF page 48 to 49: earbuds approx. 6 g each, charging case approx. 66 g, both earbuds and case approx. 78 g

Bud dimensionsiDimensions of one earbud on the explicitly identified width, height and depth axes. An unlabeled tuple cannot establish those axes.

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Not available

Case weightiCharging case mass excluding earbuds. Case-inclusive product mass does not qualify unless the source explicitly gives the empty-case figure.

46g(1.6 oz)1Maker product pagebowerswilkins.com/en-us/product/wireless-earbuds/pi8/300965.htmlRead 15 October 2026Specification Weight: Charging case 46g. Earbuds are not included.

66g(2.3 oz)1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Specifications table, PDF page 48 to 49: charging case approx. 66 g

Case dimensionsiCharging-case width, height and depth on explicitly identified source axes. Report conflicting axis labels rather than reorder a tuple by appearance.

Width65Height52Depth29mm(2.6 × 2 × 1.1 in)1Maker product pagebowerswilkins.com/en-us/product/wireless-earbuds/pi8/300965.htmlRead 15 October 2026Specification Dimensions (Charging Case): 65 mm (w) x 29 mm (d) x 52 mm (h). The axes are labelled in the source.

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Certifications

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Hi-Res AudioiThe Japan Audio Society logos. Hi-Res Audio Wireless is also written Hi-Res Wireless Audio.

Not available

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Communication certifications

Not available

Not available

FCC IDs

Not available

2A3ULMTW48Regulatory filingcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/safety_instruction/Compliance_Information_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026USA: FCC ID 2A3ULMTW4 for the earbuds. No FCC ID for the charging case

Other certifications

Not available

Snapdragon Sound4Maker product pagefirmware.s-consumer-cloud.com/help/products/mtw4/en/faq/index.htmlRead 6 October 2026Snapdragon Sound feature with aptX Lossless

In the box

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In the box

Pi8 earbuds with medium ear tips, Extra small ear tips x2, Small ear tips x2, Large ear tips x2, Charging case, USB-C charging cable, USB-C to 3.5 mm audio cable, Literature pack with Quick Start Guide and Safety and Warranty2Owner's manualbowerswilkins.com/on/demandware.static/-/Library-Sites-bowers_northamerica_shared/default/dw1ab1096c/downloads/Pi8-Manual-v5_2025Dec11_GFP.pdfRead 15 October 2026Manual section 1 carton contents, with the Quick Start Guide and Safety and Warranty literature pack.

Earbud R for right ear (model: MTW4 R) and earbud L for left ear (model: MTW4 L), Charging case (model: MTW4 C) with built-in rechargeable battery for the earbuds and wireless charging function, USB charging cable with USB C and USB A connector, approx. 0,4 m, Silicone ear adapters (size XS, S, M (pre-mounted to the earbuds) and L), Silicone ear fins (size S, M (pre-mounted to the earbuds) and L), Quick guide, Safety guide, Compliance sheet1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Package contents, page 5

Cables included

ABowers & Wilkins Pi8

Type	Length (m)	Count
USB-C to USB-C charging cable	0.6	1
3.5 mm jack to USB-C audio cable	0.8	1

Source1Maker product pagebowerswilkins.com/en-us/product/wireless-earbuds/pi8/300965.htmlRead 15 October 2026Accessories: 60 cm USB-C to USB-C charging cable and 80 cm 3.5 mm jack to USB-C audio cable. Lengths are the published nominal figures.

BSennheiser MOMENTUM True Wireless 4

Type	Length (m)	Count
USB-C to USB-A	0.4	1

Source1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Package contents: USB C to USB A cable, approx. 0.4 m. EU declaration of conformity lists USB-C 400mm

Links

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Product page

www.bowerswilkins.com/en-us/product/wireless-earbuds/pi8/300965.html1Maker product pagebowerswilkins.com/en-us/product/wireless-earbuds/pi8/300965.htmlRead 15 October 2026

eu.sennheiser-hearing.com/en-de/products/momentum-true-wireless-42Maker product pageeu.sennheiser-hearing.com/en-de/products/momentum-true-wireless-4Read 6 October 2026EU maker store, English

Spec sheet

www.bowerswilkins.com/on/demandware.static/-/Library-Sites-bowers_northamerica_shared/default/dw68d0bd69/downloads/ENGLISH-B&W-Pi8-Information-Sheet.pdf3Maker spec sheet (PDF)bowerswilkins.com/on/demandware.static/-/Library-Sites-bowers_northamerica_shared/default/dw68d0bd69/downloads/ENGLISH-B&W-Pi8-Information-Sheet.pdfRead 15 October 2026Two page English Technical Information sheet. It repeats the manual specifications for features, codecs, microphones, drive units, battery, water resistance, accessories, case dimensions and weights. Its battery footnote says testing used pre-production hardware and software paired with a smartphone.

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Manual

www.bowerswilkins.com/on/demandware.static/-/Library-Sites-bowers_northamerica_shared/default/dw1ab1096c/downloads/Pi8-Manual-v5_2025Dec11_GFP.pdf2Owner's manualbowerswilkins.com/on/demandware.static/-/Library-Sites-bowers_northamerica_shared/default/dw1ab1096c/downloads/Pi8-Manual-v5_2025Dec11_GFP.pdfRead 15 October 2026English user manual, pages 2 to 8 of a 130 page multilingual PDF. Version file name Pi8-Manual-v5_2025Dec11_GFP.pdf.

cdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdf1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Instruction manual version 07/25 A04, model MTW4, MTW4 R, MTW4 L, MTW4 C

EPREL registration numberiId in the EU energy label database. Each size or model of a series has its own id, so it is per variant.

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Warranty

1 of 1 differ

Manufacturer warranty (source market)iThe maker's warranty period for the exact SKU or configuration and market named in the source note. It applies only to that stated market, not every regional variant. Statutory consumer rights are excluded. The base term is stored. An extension that needs registration goes in the source note.

2years1Maker product pagebowerswilkins.com/en-us/product/wireless-earbuds/pi8/300965.htmlRead 15 October 2026Page: 2-year warranty valid from the date of purchase for select products. The US store is the market.

1year1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-true-wireless-4/Instruction%20manual%20MOMENTUM%20True%20Wireless%204/Instruction_manual_MOMENTUM_True_Wireless_4.pdfRead 6 October 2026Manufacturer declarations page 50: Sonova Consumer Hearing GmbH gives a warranty of 12 months on this product. The maker FAQ names a 2-year global warranty program except USA, Australia, New Zealand and Brazil, so EU buyers may get 2 years

Both are also in the API. Back to all earbuds.