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Audio-Technica ATH-M50xBT2 vs Sennheiser MOMENTUM 4 Wireless

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Product A: Audio-Technica

ATH-M50xBT2

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Product B: Sennheiser

MOMENTUM 4 Wireless

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Only differences

AAudio-Technica ATH-M50xBT2

BSennheiser MOMENTUM 4 Wireless

General

5 of 8 differ

Series

M-Series6Spec databaseifixit.com/Device/Audio_Technica_ATH-M50XBT2Read 11 October 2026Marketed by Audio-Technica as an over-ear wireless model in the M-Series lineup.

MOMENTUM2Maker product pageus.sennheiser-hearing.com/products/momentum-4-wirelessRead 5 October 2026

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

ATH-M50xBT21Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 2026Model number ATH-M50xBT2. The page also lists limited color models ATH-M50xBT2 DS and ATH-M50xBT2 IB on their own pages. They are not stored.

M4AEBT, 800107, 800074, 700383, 800073, 509267, 800109, 8001081Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 20263Maker product pageus.sennheiser-hearing.com/products/momentum-4-wireless.jsRead 5 October 2026Commercial SKU identifiers from public current maker data joined to exact colors/GTIN rows. Regulatory model M4AEBT independently established by manual cover.4Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026Exact regulatory model M4AEBT is printed on the current manual cover. Commercial SKU identifiers sit in the exact sold-configuration rows.

GTIN / EAN

49613101561831Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 2026JAN code 4961310156183 for the Japan model.

810091270431, 810091274095, 810091272626, 810091274088, 810091270455, 810091274323, 8100912743163Maker product pageus.sennheiser-hearing.com/products/momentum-4-wireless.jsRead 5 October 2026Each barcode joined to exact SKU and color in variants. Black current SKU 800107 differs from stale product specification Black 509266. Barcode 810091270431 matches current Black. Current SKU used without claiming another hardware generation.

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

Not available

9 August 20226Press releasecdn.uc.assets.prezly.com/ba6f235a-b675-4ed2-bacf-090e7ac559bd/-/inline/no/press-releasesennheiser-momentum-4-wireless.pdfRead 5 October 2026Exact manufacturer US launch PDF, dated August 9, 2022. Four pages opened.

Status

Available5Retailer pagecoolblue.nl/en/product/891664/audio-technica-ath-m50xbt2.htmlRead 11 October 2026Sold on Coolblue with manufacturer code ATH-M50xBT2.

Available2Maker product pageus.sennheiser-hearing.com/products/momentum-4-wirelessRead 5 October 2026

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 5 Wireless10Reviewsoundguys.com/sennheiser-momentum-5-wireless-131570Read 23 October 2026SoundGuys's launch article calls the MOMENTUM 4 the previous model of the MOMENTUM 5 Wireless.

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

$1993Reviewsoundguys.com/audio-technica-ath-m50xbt2-review-60821Read 11 October 2026Spec box: Original price $199.4Spec databasesoundguys.com/product/audio-technica-ath-m50xbt2Read 11 October 2026Msrp USD 199, year 2021.

$349.956Press releasecdn.uc.assets.prezly.com/ba6f235a-b675-4ed2-bacf-090e7ac559bd/-/inline/no/press-releasesennheiser-momentum-4-wireless.pdfRead 5 October 2026Page 4 MSRP 349.95 USD, 459.95 CAD. Only USD retained, before applicable local sales tax. Planned sale August 23 is separately corroborated by retrospective actual release source. Euro launch 349.90 has unproven VAT scope and is omitted.

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

Not available

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

Not available

US6Press releasecdn.uc.assets.prezly.com/ba6f235a-b675-4ed2-bacf-090e7ac559bd/-/inline/no/press-releasesennheiser-momentum-4-wireless.pdfRead 5 October 2026

ColoursiThe maker's own colour names

Black5Retailer pagecoolblue.nl/en/product/891664/audio-technica-ath-m50xbt2.htmlRead 11 October 2026Color: Black

Black, Brown, Graphite, Teal, White, Denim, Copper3Maker product pageus.sennheiser-hearing.com/products/momentum-4-wireless.jsRead 5 October 2026Public official product data currently lists seven sold color configurations. Related M5 colors and accessories excluded.

Segment

Music1Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 2026Listed as a wireless headphone in the consumer headphone range, not in the professional monitor range. Described as the wireless version of the M50x monitor headphones.

Music1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026

Design

1 of 7 differ

Form factor

Over-ear5Retailer pagecoolblue.nl/en/product/891664/audio-technica-ath-m50xbt2.htmlRead 11 October 2026Type of ear cushions: Over-ear

Over-ear1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026

Ear cup enclosureiClosed, open or semi-open acoustic enclosure. This does not describe how the headset folds.

Closed1Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 2026Type: closed dynamic (Japanese: 密閉ダイナミック型)2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026Specifications, Headphones: Closed-back dynamic5Retailer pagecoolblue.nl/en/product/891664/audio-technica-ath-m50xbt2.htmlRead 11 October 2026Types of design: Closed

Closed1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026

Wearing style

Headband2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026Parts: headband with sliders, arms, joints and housings. Worn on the head.

Headband1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026

FoldingiFlat means the ear cups rotate flat. Inward means the ear cups fold toward the headband.

Flat and inward2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026Swivel mechanism: you can fold the housing so that it lies flat, up to 90 degrees. Compact folding: you can fold the housing into the inner side of the headband using the joints.3Reviewsoundguys.com/audio-technica-ath-m50xbt2-review-60821Read 11 October 2026Folds down for storage. Articulating arms and ear cups make it easy to stow away.

Flat6Press releasecdn.uc.assets.prezly.com/ba6f235a-b675-4ed2-bacf-090e7ac559bd/-/inline/no/press-releasesennheiser-momentum-4-wireless.pdfRead 5 October 2026US manufacturer launch PDF Design section expressly fold-flat design. Current manual page 34 case diagram corroborates flat rotated earcups.

Swivelling ear cupsiEar cups can rotate relative to the headband. Tilting alone does not count.

Yes2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026Swivel mechanism: the housing lies flat. The housing also turns about 180 degrees on the arm (Reversing the housing).3Reviewsoundguys.com/audio-technica-ath-m50xbt2-review-60821Read 11 October 2026The ear cups can articulate in multiple directions.

Yes1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026Current manual page 34 storage diagram and exact maker fold-flat claim show each cup rotated flat without an inward-folded headband. No separate folding hinge asserted.

RGB lighting

Not available

Not available

Lighting zonesiNumber of independently controllable lighting areas across both ear cups.

Not available

Not available

Drivers and sound

11 of 20 differ

Driver type

Dynamic1Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 2026Type: closed dynamic

Dynamic1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026

Driver sizeiDiameter of the largest sound driver. Do not use the microphone capsule diameter.

45mm1Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 2026Driver 45 mm. The page names a 45 mm large-aperture driver.2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026Specifications, Headphones: Driver 45 mm

42mm1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026

Drivers per sideiNumber of sound-producing transducers in one side, excluding microphones.

Not available

Not available

Diaphragm material

Not available

Not available

Magnet

Not available

Not available

Frequency response (wired or passive)iPublished acoustic range for wired listening, or the maker’s single range when no mode is distinguished. Power state and test standard belong in the source note.

Min15 HzMax28 kHz1Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 2026Frequency response 15 to 28,000 Hz2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026Specifications, Headphones: Frequency response 15 to 28,000 Hz

Min6 HzMax22 kHz1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026Page 39 headphone range 6 Hz-22 kHz at -10 dB, not microphone or Bluetooth transmission bandwidth.

Wireless audio transmission bandiFrequency range of audio transmitted over the wireless connection, not the acoustic response of the driver. Codec, sampling rate and bitrate conditions belong in the source note. When the maker gives a range per codec, the widest range is stored and its codec goes in the source note.

Min20 HzMax40 kHz1Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 2026Transmission band 20 to 40,000 Hz with LDAC at 96 kHz sampling and 990 kbps. 20 to 20,000 Hz at 44.1 kHz sampling.2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026Communication specifications: Transmission band 20 to 40,000 Hz (LDAC 96 kHz sampling, 990 kbps), 20 to 20,000 Hz (44.1 kHz sampling)

Not available

Impedance (passive when specified)iUse the headset-off value for a passive analog connection when the maker publishes both powered and passive values. Note the power state and test frequency.

38Ω1Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 2026Impedance 38 ohm2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026Specifications, Headphones: Impedance 38 ohms

60Ω2Maker product pageus.sennheiser-hearing.com/products/momentum-4-wirelessRead 5 October 2026Exact specification gives active 470 ohms and passive 60 ohms. Passive value 60 retained by schema rule. Active 470 is not substituted.

Sensitivity (passive when specified)iUse the headset-off figure when both powered and passive values exist. The power or voltage reference, test distance and frequency belong in the source note.

99dB1Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 2026Output sound pressure level 99 dB/mW2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026Specifications, Headphones: Sensitivity 99 dB/mW

106dB1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026Page 39 gives 106 dB SPL at 1 kHz / 0 dBFS. This is not 1 mW or 1 V sensitivity, so sensitivity_reference omitted.

Sensitivity referenceiPublished power or voltage reference for sensitivity. Do not assume 1 mW when the source gives only a dB value.

Per 1 mW1Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 2026The maker gives the level per mW.

Not available

THD (claimed)iPublished distortion figure or numerical upper bound. The source note states any less-than sign and test level.

Not available

0.3%1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026Page 39 less than 0.3%, 1 kHz / 100 dB SPL. Stored 0.3 is the stated bound, not measured distortion.

Max input power

Not available

Not available

Max digital audio sample rateiHighest supported digital audio sample rate over a USB cable or wireless dongle. This is not the microphone rate or acoustic frequency response.

Not available

Not available

Max digital audio bit depthiHighest published digital playback bit depth over a USB cable or wireless dongle.

Not available

Not available

DAC

AKM AK43311Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 2026AKM Hi-Fi DAC and headphone amplifier AK4331, 96 kHz/24 bit.

Not available

Personalised soundiA manufacturer-supported hearing test or ear scan creates a device sound profile tailored to the listener. Generic equalizer adjustments do not count.

Not available

Not available

Onboard EQiCustom playback EQ profiles stored in the headset and applied without the host app running. Note supported active connections. Receiver-only or software-only EQ does not count.

Not available

Yes1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026Page 31 explicitly says sound effects are stored in headphones and active without Smart Control on another Bluetooth device.

Custom EQ bandsiNumber of bands in the custom playback equalizer. Microphone EQ bands are excluded.

Not available

52Maker product pageus.sennheiser-hearing.com/products/momentum-4-wirelessRead 5 October 2026Current exact comparison column states 5-band EQ plus personalization. Original launch app had fewer bands, so current count is not asserted as launch configuration.

EQ presets

Not available

Bass boost1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026

Volume limit

Not available

Not available

Spatial audio

None of 3 known

Spatial audio supportiNamed headset or host spatial-audio systems that the maker or reviewer explicitly supports. A platform feature may require compatible hardware, software or a separate licence.

Not available

Not available

Spatial audio licence includediA paid spatial-audio licence is bundled or embedded. Compatibility with a separately purchased app does not count.

Not available

Not available

Head tracking

Not available

Not available

Noise cancelling

7 of 10 differ

Active noise cancelling

No4Spec databasesoundguys.com/product/audio-technica-ath-m50xbt2Read 11 October 2026Noise reduction type: passive noise isolation. The spec list has no active noise cancelling.

Yes1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026

ANC typeiFeedforward uses outside microphones. Feedback uses inside microphones. Hybrid uses both. Voice-call noise filtering is separate.

Not available

Hybrid1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026

ANC microphonesiTotal microphones used for active playback noise cancellation across both sides. Do not substitute the total physical or voice microphone count.

Not available

41Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026Page 7 explicitly two outward and two inward ANC microphones, total 4. It does not imply 8 speech microphones.

Adaptive ANCiNoise cancellation automatically changes with the environment or fit. Manually choosing a level does not count.

Not available

Yes1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026Page 26 app Adaptive switch automatically adjusts reduction to noise conditions. Manual excludes Transparency Mode during calls.

ANC levelsiNumber of adjustable cancellation strength steps. Off and transparency modes are excluded.

Not available

Not available

ANC attenuation (claimed)

Not available

Not available

Transparency mode

Not available

Yes1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026

Adjustable transparency

Not available

Yes1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026

Conversation detectioniAudio pauses or lowers automatically when the wearer speaks. Voice assistant activation does not count.

Not available

Not available

Wind noise reduction

Not available

Yes1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026Page 26 Off/Auto/Max wind-noise reduction settings. No numeric attenuation claim inferred.

Measured

4 of 21 differ

Frequency response notesiMeasured by a reviewer, not claimed by the maker

Conservative response. Mids and upper bass are under-emphasized with a dip around 300 Hz. Treble follows the target a few decibels quieter.3Reviewsoundguys.com/audio-technica-ath-m50xbt2-review-60821Read 11 October 2026Mids and upper-bass frequencies are under-emphasized. A slight dip at 300 Hz. Treble follows the ideal curve a few decibels quieter. The wired response is the same as the Bluetooth response.

The lab response has a small sub-bass boost and some emphasized highs against the SoundGuys headphone preference curve. The reviewer describes good overall agreement and clear speech detail.5Reviewsoundguys.com/sennheiser-momentum-4-wireless-review-2-86111Read 5 October 2026SoundGuys lab measurement and reviewer discussion, not the maker 6-22 kHz frequency range. No qualitative chart peak converted to dB.

Bass amountiReviewer’s bass deviation from its stated target. Positive is more bass. Target and test method belong in the source note.

Not available

Not available

Treble amountiReviewer’s treble deviation from its stated target. Positive is more treble. Target and test method belong in the source note.

Not available

Not available

Deviation from targetiReviewer’s full-range error from its target curve. Do not substitute a regional bass or treble error.

Not available

Not available

Consistency between fittingsiReviewer’s standard deviation across repeated fittings. Test rig and fitting procedure belong in the source note.

Not available

Not available

Harmonic distortioniIndependently measured harmonic distortion, with test level and method in the source note.

Not available

Not available

Sound leakageiIndependently measured leakage at 30 cm. Playback level and method belong in the source note.

Not available

Not available

Measured noise isolationiIndependently measured attenuation. Positive values mean more noise reduction. ANC state, rig and frequency bands belong in the source note.

Not available

Not available

Noise isolation (measured, best)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

Not available

Mic quality notesiMeasured by a reviewer, not claimed by the maker

Not available

Recorded speech samples show usable voice quality. Background-noise rejection remains a limitation. Samples cover ideal, office, street, wind and reverberant conditions.5Reviewsoundguys.com/sennheiser-momentum-4-wireless-review-2-86111Read 5 October 2026Multiple tested units, latest stated firmware 2.13.35/app 4.9.1. The article does not date every speech recording or identify codec. These remain unknown.

Mic low-frequency extensioniMeasured by a reviewer, not claimed by the maker

Not available

Not available

Mic high-frequency extensioniMeasured by a reviewer, not claimed by the maker

Not available

Not available

Mic speech-to-noise ratioiMeasured by a reviewer, not claimed by the maker

Not available

Not available

Measured latencyiEnd-to-end latency measured by a reviewer for a specific connection, platform and codec. Firmware, method and operating mode belong in the source note.

Not available

Not available

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

Not available

Not available

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

Not available

Not available

Measured battery lifeiReviewer’s continuous playback test. State the connection, ANC and lighting where known. Unknown settings stay omitted and are described in the source note.

AAudio-Technica ATH-M50xBT2

Connection	ANC	Hours (h)
Bluetooth	No	64.85

Source3Reviewsoundguys.com/audio-technica-ath-m50xbt2-review-60821Read 11 October 2026Constant music playback peaking at 75 dB(SPL) lasted 64 hours 51 minutes, stored as 64.85 hours. Connection is Bluetooth. Codec is not stated.

BSennheiser MOMENTUM 4 Wireless

Connection	ANC	Hours (h)
Bluetooth	Yes	56.35

Source5Reviewsoundguys.com/sennheiser-momentum-4-wireless-review-2-86111Read 5 October 2026Continuous music peaking 75 dB SPL, ANC on, 56 h 21 min. Codec and test-specific firmware not published. Article reviewed multiple units and names latest firmware 2.13.35/app 4.9.1, but it does not assign that firmware to this battery sample. No latest-firmware assumption.

Battery life (measured, max)iMeasured by a reviewer, not claimed by the maker

64.85h=CalculatedFrom Measured battery life

56.35h=CalculatedFrom Measured battery life

Clamping forceiMeasured by a reviewer, not claimed by the maker

Not available

Not available

Weight (measured)iIndependently weighed headset. A review that repeats the maker’s number does not qualify. Cable and microphone inclusion belong in the source note.

Not available

Not available

Microphone

6 of 16 differ

MicrophoneiMain microphone used for speech. Secondary internal microphones may be described in the source note.

Built-in1Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 2026Two small MEMS microphones in the housing.

Built-in1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026

Microphone element

MEMS1Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 2026Microphone type: MEMS2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026Specifications, Microphone: Type MEMS

MEMS1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026

Microphone pickup patterniUse the maker’s exact named pattern. Unidirectional does not establish whether the capsule is cardioid, supercardioid or hypercardioid.

Omnidirectional1Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 2026Polar pattern: omnidirectional. The page also describes beamforming with the two microphones.2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026Specifications, Microphone: Polar pattern omnidirectional

Omnidirectional1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026

Voice microphonesiTotal microphones used for voice pickup or beamforming across both sides. ANC-only microphones are excluded.

21Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 2026Two MEMS microphones are placed in two places of the headphone housing for beamforming.

41Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026Pages 6/39 explicitly four speech microphones as two 2-mic beamforming arrays. ANC-only mics are separately counted.

Total microphonesiEvery physical microphone across the headset, including call, ANC and calibration microphones. Shared microphones count once. Excludes microphones in charging cases or receivers, and vibration sensors. Use an explicitly published physical total, never a sum of overlapping role counts.

Not available

Not available

Mic frequency responseiAcoustic microphone response, not its digital sampling rate. Connection-specific ranges belong in the source note.

Min85 HzMax15 kHz1Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 2026Microphone frequency band 85 to 15,000 Hz2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026Specifications, Microphone: Frequency response 85 to 15,000 Hz

Min80Max8,000Hz1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026Latest manual page 39 gives 80 Hz-8 kHz at -3 dB. Current product page says 50 Hz-10 kHz, so newer exact manual is preferred and conflict recorded.

Mic sensitivityiPublished microphone sensitivity. Reference such as dBV/Pa or dBFS, frequency and distance belong in the source note.

-38dB1Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 2026-38 dB at 1 V/Pa, 1 kHz. The reference is dBV per pascal.2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026Specifications, Microphone: Sensitivity -38 dB (1 V/Pa, at 1 kHz)

Not available

Mic signal-to-noiseiPublished microphone signal-to-noise ratio. Minimum or typical conditions belong in the source note.

Not available

Not available

Mic sample rateiExplicitly published digital microphone capture or speech sampling rate. State the audio route in the source note, or say it is unpublished. Internal capture does not prove the effective rate on every connection. Acoustic bandwidth, playback rate and generic microphone-chip capability do not qualify.

Not available

Not available

Mic noise reductioniProcessing that removes noise from transmitted speech. Playback ANC and a directional microphone alone do not count.

DSP1Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 2026Beamforming microphone technology gives directivity toward the speaker's mouth to improve call quality in noisy places. Stored as DSP.

DSP2Maker product pageus.sennheiser-hearing.com/products/momentum-4-wirelessRead 5 October 2026

Flip to mute

Not available

Not available

Mute button

Not available

Yes1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026Page 28 multifunction button toggles call microphone mute. Page 30 also explains sensor mute after taking off.

Mute indicatoriPublished indication of microphone mute. mechanical_marker is a visible physical marker showing the microphone's mute-switch position. LED options require an electronic light. The in-line controller option is for a mute light on a cable remote.

Not available

Voice prompt1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026Page 28 explicitly audible Mute on/Mute off voice prompts.

Sidetone

Yes1Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 2026Side tone function lets you hear your own voice through the microphones during a call. It can be switched on or off in the app.2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026App function Side Tone: on or off during a call. On at the time of purchase.3Reviewsoundguys.com/audio-technica-ath-m50xbt2-review-60821Read 11 October 2026It has an optional sidetone.

Yes1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026

Adjustable sidetone

Not available

Yes1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026Page 29 Sidetone enabled/disabled and intensity slider.

Foam microphone windscreeniA foam cover for the voice microphone. An internal metal mesh pop filter does not count.

Not available

Not available

Connectivity

9 of 20 differ

Audio connectionsiConnections that carry playback audio. Charging or firmware USB alone does not count as USB audio.

Bluetooth, Analog2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026Bluetooth connection chapters and the wired connection (playthrough) chapter. The USB-C battery jack is for charging only.

Analog, USB, Bluetooth1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026Pages 26/32/33 explicitly Bluetooth, analog and USB playback. USB-C port carries audio, microphone and power.

Analog source plugsiAnalog plug(s) supplied for the source device, including adapters. The headset-side jack is listed separately.

3.5 mm TRS1Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 20261.2 m cord with a 3.5 mm gold-plated stereo mini-plug. The online manual says the cord has no microphone.2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026Accessories: cable with a 3.5 mm gold-plated stereo mini-plug, L-shaped.

3.5 mm TRS1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026SoundGuys exact TRS cable corroborates manual 3.5 mm source plug and 2.5 mm headset plug.

Cable connector on headsetiConnection used by the playback cable at the headset. A fixed cable is not replaceable through a headset jack.

3.5 mm2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026Operation area: the connector jack takes the included cable for wired connection. The cable plug is 3.5 mm.

2.5 mm1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026

Longest included cableiLength of the longest supplied cable, including charging and dongle cables. Individual cable lengths are listed in Cables included.

1.2m1Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 20261.2 m cord2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026Accessories: cable 1.2 m (3.9 ft)

1.2m8Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 8 October 2026Package contents printed page 5: both supplied USB-C to USB-A cable and 2.5 mm to 3.5 mm analog cable are approximately 1.2 m. Longest supplied cable, not an optional longer accessory.

Headset USB plug or portiUSB plug or port on the headset or its included wired audio adapter. A charging-only USB port can appear here.

USB-C2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026The USB Type-C side of the charging cable plugs into the battery jack. The jack is for charging only.

USB-C1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026

Audio over USB-C cableiPlayback through a USB-C cable or included wired USB-C audio adapter. A charging-only USB-C port does not count.

Not available

Yes1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026

Passive wired listeningiAnalog playback works with the headset powered off or its battery empty. An active analog converter that needs headset power does not count.

Yes1Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 2026The 1.2 m cord lets you use the headphones by wire when the battery has run out.2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026Wired connection (playthrough function): music plays even when there is no battery power. The buttons do not work and the cable has no microphone.

Yes1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026Page 32 explicitly analog listening when the headphone battery is empty. Music/call/assistant controls disabled, ANC requires charged battery.

Wireless receiveriDedicated wireless audio receiver or dongle. A wired USB sound card does not count.

None2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026Bluetooth headphones. No dongle in the accessories.

Not available

Wireless receiver connectoriPhysical USB connector on the receiver. Supplied extension cables and adapters are explained in the source note. Both means two native connector types.

Not available

Not available

Wireless range (claimed)iMaker’s advertised wireless range. Connection and indoor or outdoor conditions belong in the source note. Measured distance is not stored here.

10m1Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 2026Maximum communication range: within 10 m in line of sight.2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026Communication specifications: line of sight approx. 10 m (33 ft)

Not available

Bluetooth

5.01Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 2026Bluetooth standard Ver. 5.02Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026Communication specifications: Bluetooth version 5.0

5.21Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026

Bluetooth codecsiNamed Bluetooth audio codecs supported by this exact model. Host, firmware and operating-mode restrictions belong in the source note.

LDAC, AAC, SBC1Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 2026Supported codecs: LDAC, AAC, SBC2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026Communication specifications: Supported codec LDAC, AAC, SBC

SBC, AAC, aptX, aptX Adaptive1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026Printed page 39 lists aptX Adaptive, AAC and SBC. Current August 2026 maker specification separately confirms classic aptX, included from that exact table. Bluetooth Low Energy device name does not prove LE Audio.9Maker product pagesupport.sennheiser-hearing.com/hc/en-at/articles/37791406604189-MOMENTUM-4-Wireless-SpecificationsRead 8 October 2026Current exact MOMENTUM 4 table updated August 8, 2026 expressly lists SBC, AAC, aptX and aptX Adaptive. It identifies the Black 509266 and other exact finish SKUs. Older manual omits classic aptX. Current explicit maker specification supports it without implying aptX HD, aptX Lossless or a firmware version.

LE AudioiLE Audio playback support. Bluetooth Low Energy for app control alone does not count.

Not available

Not available

AuracastiAuracast broadcast audio support. Required phone, firmware and app conditions belong in the source note.

Not available

Not available

Bluetooth multipointiCan remain connected to multiple Bluetooth source devices at once. Mixing Bluetooth with a proprietary dongle is a separate field. A maker's dual connection to two Bluetooth devices at once counts.

Yes1Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 2026Supports multipoint with two Bluetooth devices at the same time.2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026Multipoint function: two Bluetooth devices connected at the same time.3Reviewsoundguys.com/audio-technica-ath-m50xbt2-review-60821Read 11 October 2026Google Fast Pair and multipoint capability.

Yes1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026

Multipoint devicesiNumber of Bluetooth source devices connected at once, not the number remembered for later pairing.

22Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026Multipoint function: up to two Bluetooth devices can be connected at the same time.

21Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026

Paired devices remembered

Not available

68Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 8 October 2026Bluetooth connection section printed page 16: six saved profiles, two active connections. A seventh pairing overwrites the least-used stored profile. One audio source plays at a time.

Mixes 2.4 GHz and Bluetooth audioiPlays both wireless audio streams at the same time. Automatic switching or Bluetooth standby does not count.

Not available

Not available

Fast pairing

Google Fast Pair1Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 2026Supports Fast Pair for Android 6.0 or later. Only one Android device can use Fast Pair.2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026Pairing with Fast Pair on Android devices.3Reviewsoundguys.com/audio-technica-ath-m50xbt2-review-60821Read 11 October 2026Google Fast Pair.

Not available

Base station

Not available

Not available

Latency

1 of 2 differ

Low latency modeiA selectable mode intended to reduce audio delay. A low-latency connection without a distinct mode does not count.

Yes1Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 2026Low Latency Mode reduces delay for video and games. It is switched in the app.2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026App function Low Latency Mode reduces sound delay when playing games or watching videos.

Not available

Claimed latencyiMaker’s claimed delay for the stated connection and mode. Minimum claims and host restrictions belong in the source note.

Not available

Not available

Compatibility

2 of 3 differ

Compatible platformsiPlatforms with a documented audio path. This does not imply every connection or microphone function works. Platform editions must be checked individually.

Android, iOS3Reviewsoundguys.com/audio-technica-ath-m50xbt2-review-60821Read 11 October 2026Android owners can choose LDAC. Apple users can use AAC.

Windows, macOS, Android, iOS1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026

Connection per platformiOnly explicitly documented playback paths for the exact model. Microphone support is separate. Leave unknown microphone support omitted. An Xbox and a PlayStation edition of one headset can connect differently, so it is per variant.

AAudio-Technica ATH-M50xBT2

Not available

BSennheiser MOMENTUM 4 Wireless

Platform	Connection	Microphone works
Windows	USB	Yes
macOS	USB	Yes
Windows	Bluetooth	Yes
macOS	Bluetooth	Yes
iOS	Bluetooth	Not available
Android	Bluetooth	Not available

Source1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026Page 33 USB playback and microphone recording for PC/Mac/mobile device. Page 27 explicitly PC/Mac Bluetooth calling. Page 29 mobile assistant Siri/Google Assistant plus maker iPhone battery test establishes iOS/Android Bluetooth playback. Unknown mobile call path remains omitted.

Official licence

Not available

Not available

Battery and charging

9 of 13 differ

Battery capacityiRated capacity of one headset battery. Do not use case, receiver or total multi-battery capacity.

Not available

700mAh1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026Page 39 one built-in 3.7 V, 700 mAh, 2.59 Wh pack. Capacity and energy agree. No headset Wh field is available.

Swappable batteryiBattery can be exchanged by the user as part of normal operation. Service or recycling disassembly does not count.

Not available

No1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026Page 36 built-in battery faults are repaired through Sonova service. It is not a normal removable or hot-swap pack.

Batteries includediNumber of headset batteries supplied, including the one already installed.

Not available

Not available

Claimed battery lifeiMaker’s maximum playback time per stated connection, codec, ANC, spatial audio and lighting settings. Name the spatial processing mode and other conditions in the source note. Unknown settings stay omitted.

AAudio-Technica ATH-M50xBT2

Connection	Hours (h)
Bluetooth	50

Source1Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 2026Continuous transmission time for music playback: max approx. 50 hours. Figures depend on use conditions. The codec and volume are not stated.2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026Specifications, Other: continuous transmission time (music playback) max approx. 50 hours.

BSennheiser MOMENTUM 4 Wireless

Connection	ANC	Hours (h)
Bluetooth	Yes	60

Source1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026Page 39 up to 60 h music playback via Bluetooth with ANC on. Current maker page specifies iPhone, mid-volume, codec unspecified.

Battery life (claimed, max)

50h=CalculatedFrom Claimed battery life

60h=CalculatedFrom Claimed battery life

Battery life with ANC (claimed)

Not available

60h=CalculatedFrom Claimed battery life

Battery life without ANC (claimed)

Not available

Not available

Charging port

USB-C2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026Operation area: the battery jack takes the included USB charging cable, Type-C side.

USB-C1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026

Full charge timeiPublished time to fully charge a depleted headset. In-use charging can take longer.

210min1Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 2026Charging time approx. 3.5 hours, stored as 210 minutes.2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026Specifications, Other: charging time approx. 3.5 hours. Figures depend on operating conditions.

120min1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026Page 13 explicitly complete charging cycle approximately 2 h. Page 39 repeats 2 h. Ambient temperature and power source can change it.

Quick charge timeiCharge duration in the maker’s quick-charge claim. Read together with Quick charge playback.

10min1Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 2026About 10 minutes of charging gives about 180 minutes of continuous playback.3Reviewsoundguys.com/audio-technica-ath-m50xbt2-review-60821Read 11 October 202610 minutes of charge delivers 180 minutes of audio with the included USB-C to USB-A cable.

5min2Maker product pageus.sennheiser-hearing.com/products/momentum-4-wirelessRead 5 October 2026

Quick charge playbackiPlayback gained from Quick charge time. Charger power, codec, volume and ANC conditions belong in the source note.

3h1Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 2026About 180 minutes of playback, stored as 3 hours. Charger conditions are not stated.

4h2Maker product pageus.sennheiser-hearing.com/products/momentum-4-wirelessRead 5 October 2026Exact specifications states 5 min up to 4 h. Separate marketing section says 10 min / 6 h, a different charge duration. The matched 5 min / 4 h pair is kept.

Use while charging

No2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026If you start to charge while the product is on, it automatically turns off.

Yes1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026Page 13 explicitly permits music and phone calls during charging, possibly extending charge time.

Charging dock or stand

Not available

Not available

Controls

4 of 6 differ

Controls

Buttons2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026Operation area: power supply and control button, volume buttons and a voice assistant button.

Buttons, Touch1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026

Volume control

Buttons2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026Volume buttons (+/-) adjust the volume by one level per press.3Reviewsoundguys.com/audio-technica-ath-m50xbt2-review-60821Read 11 October 2026Physical buttons. A two-second press and hold of the volume buttons skips tracks.

Touch1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026

Game and chat mixiBalances separate game and chat audio streams. Mixing Bluetooth and dongle source volume alone does not count. Supported platforms belong in the source note.

Not available

Not available

Remappable controlsiOn-device button, touch or dial functions can be reassigned. Changing EQ alone does not count.

Not available

Not available

Wear detection

Not available

Yes1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026

Voice assistant

Amazon Alexa, Google Assistant, Siri1Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 2026Siri and Google Assistant start with the voice assistant button. Amazon Alexa works after a key change in the Connect app.2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026Speech recognition feature such as Google Assistant or Siri starts with the voice assistant button.4Spec databasesoundguys.com/product/audio-technica-ath-m50xbt2Read 11 October 2026Voice assistant support: Alexa, Google Assistant, Siri

Siri, Google Assistant1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026Page 29 host assistant activated by button over Bluetooth or USB, example Siri/Google Assistant depending on mobile system/app. No built-in always-listening assistant assumed.

Comfort and build

6 of 11 differ

Headband type

Not available

Padded1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026

Headband material

Not available

Plastic5Reviewsoundguys.com/sennheiser-momentum-4-wireless-review-2-86111Read 5 October 2026Use section explicitly describes a plastic band replacing the predecessor metal band. Not mapped to earcup shell material.

Frame material

Not available

Not available

Ear cup material

Not available

Not available

Ear pad material

PU leather4Spec databasesoundguys.com/product/audio-technica-ath-m50xbt2Read 11 October 2026Ear pad type: PU leather5Retailer pagecoolblue.nl/en/product/891664/audio-technica-ath-m50xbt2.htmlRead 11 October 2026Ear cushion material: Foam, Imitation leather. The same as the PU leather listed by SoundGuys.

Leatherette5Reviewsoundguys.com/sennheiser-momentum-4-wireless-review-2-86111Read 5 October 2026Use section explicitly soft leatherette padding.

Replaceable ear pads

Yes1Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 2026Replacement ear pads HP-M50x BK are sold as spare parts.2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026Sold separately: earpad, cable.

Yes1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026

Ear pad attachmentiHow a replacement ear pad attaches to the ear cup, not how the decorative outer cover attaches. A press-fit or snap-on pad counts as clip.

Not available

Clip1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026Page 35 removal with fastening ring and new pad clicks into earcup.

Ear pad openingiUsable opening inside an ear pad, excluding the outer cushion. Depth is the internal space between pad surface and driver cover.

Not available

Width35Height60mm(1.4 × 2.4 in)5Reviewsoundguys.com/sennheiser-momentum-4-wireless-review-2-86111Read 5 October 2026Exact model metadata Inside earcup 60 x 35 mm, matching vertical oval in photos. Height 60, width 35. Depth unknown.

Ear tips included

Not available

Not available

Dust and water rating

Not available

Not available

User-replaceable parts

Ear pads, Cable1Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 2026Sold separately: ear pad HP-M50x and cord.2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026Sold separately: earpad, cable.

Ear pads1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026

Software

1 of 3 differ

Companion app

Audio-Technica Connect2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026Compatible with the Connect app.

Sennheiser Smart Control Plus2Maker product pageus.sennheiser-hearing.com/products/momentum-4-wirelessRead 5 October 2026Current page names Smart Control Plus, while the 2025 manual still says Smart Control. Existing product remains supported.

App platforms

Android, iOS4Spec databasesoundguys.com/product/audio-technica-ath-m50xbt2Read 11 October 2026Companion app: iOS + Android

Android, iOS1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026Page 19 explicitly Apple App Store and Google Play downloads.

User firmware updates

Yes1Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 2026The Connect app can also update the headphone firmware (online manual).2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026The app also updates the product firmware.3Reviewsoundguys.com/audio-technica-ath-m50xbt2-review-60821Read 11 October 2026The Connect app is used for EQ, firmware updates and Bluetooth codec switching.

Yes1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026

Dimensions and weight

1 of 2 differ

Headset weightiPublished headset mass without detachable cable or microphone when stated. A fixed cable remains included. Any unqualified maker weight is identified in the source note.

307g(10.8 oz)1Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 2026Mass approx. 307 g2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026Specifications, Other: approx. 307 g (10.8 oz)5Retailer pagecoolblue.nl/en/product/891664/audio-technica-ath-m50xbt2.htmlRead 11 October 2026Weight 307 g, the same as the maker.

293g(10.3 oz)1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026Page 39 maker approximate 293 g whole headset. No review metadata treated as a scale test.

Headset dimensionsiBody size with headband upright and ear cups in their normal wearing position. Width is across the head, height is top to bottom, and depth is front to back. Folded or flat-swivel dimensions are not substituted.

Not available

Not available

Certifications

None of 3 known

Hi-Res Audio

Not available

Not available

Communication certifications

Not available

Not available

FCC ID

Not available

Not available

Other certifications

Not available

Not available

In the box

3 of 3 differ

In the box

ATH-M50xBT2 headphones, USB charging cable (USB Type-A to USB Type-C), Audio cable with 3.5 mm stereo mini-plug, Pouch1Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 2026Accessories: 30 cm USB charging cable (USB Type-A / USB Type-C), 1.2 m cord (3.5 mm gold-plated stereo mini-plug, L-shaped), pouch.2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026Accessories: USB charging cable 30 cm (12 in, USB Type-A / USB Type-C), cable 1.2 m, pouch.

MOMENTUM 4 headphones, Carry case, USB-A to USB-C cable, 2.5 mm to 3.5 mm audio cable, Airplane adapter, Quick guide, Safety guide, Compliance sheet1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026Manual page 5 includes the headphones, USB cable, analog cable, carry case, in-flight adapter, Quick guide, Safety guide and Compliance sheet.2Maker product pageus.sennheiser-hearing.com/products/momentum-4-wirelessRead 5 October 2026Exact maker box section corroborates manual page 5. Both cables approximately 1.2 m. BTD 700 is optional and excluded.

Cables includediSupplied playback, charging, dongle and adapter cables. A permanently attached headset cable is included and named as fixed.

AAudio-Technica ATH-M50xBT2

Type	Length (m)	Count
USB charging cable (USB Type-A to USB Type-C)	0.3	1
Audio cable with 3.5 mm gold-plated stereo mini-plug (L-shaped)	1.2	1

Source1Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 202630 cm charging cable and 1.2 m audio cord.2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026USB charging cable 30 cm (12 in) and audio cable 1.2 m (3.9 ft).

BSennheiser MOMENTUM 4 Wireless

Type	Length (m)	Count
USB-A to USB-C charging and audio cable	1.2	1
2.5 mm to 3.5 mm TRS audio cable	1.2	1

Source1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 2026Manual page 5 explicitly gives both USB-A to USB-C and 2.5 mm to 3.5 mm audio cables at approximately 1.2 m each.

Carrying caseiSupplied carrying case or pouch. A retail carton does not count as a carrying case.

Soft3Reviewsoundguys.com/audio-technica-ath-m50xbt2-review-60821Read 11 October 2026You get a carry pouch, a headphone jack cable and a USB-C to A charging cable. The reviewer calls the pouch a flimsy vinyl carrying sack.

Hard5Reviewsoundguys.com/sennheiser-momentum-4-wireless-review-2-86111Read 5 October 2026Exact review calls the supplied case fabric with rigid plastic. Hard case enum describes its supporting shell, not a soft pouch.

Links

Not compared

Product page

www.audio-technica.co.jp/product/ATH-M50xBT21Maker product pageaudio-technica.co.jp/product/ATH-M50xBT2Read 11 October 2026

us.sennheiser-hearing.com/products/momentum-4-wireless2Maker product pageus.sennheiser-hearing.com/products/momentum-4-wirelessRead 5 October 2026

Spec sheet

Not available

us.sennheiser-hearing.com/products/momentum-4-wireless2Maker product pageus.sennheiser-hearing.com/products/momentum-4-wirelessRead 5 October 2026

Manual

www.audio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.html2Owner's manualaudio-technica.co.jp/document/ATH-M50xBT2/en/Content/Wireless/ATH-M50xBT2/index.htmlRead 11 October 2026Official English online manual, 48 topics, built September 2021.

cdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdf1Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/momentum-4-wireless/Instruction%20manual%20MOMENTUM%204%20Wireless/Instruction_manual_MOMENTUM_4_Wireless.pdfRead 5 October 202641-page current English manual, version 07/25 A05. Hardware 6-7, specifications 39, charging 13-15, audio 32-33, controls 22/26-31 and pad replacement 35 checked.

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.

Not available

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Warranty

None of 1 known

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.

Not available

Not available

Both are also in the API. Back to all headsets and headphones.