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Bowers & Wilkins Px7 S3 vs Marshall Monitor III A.N.C.

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Product A: Bowers & Wilkins

Px7 S3

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B

Product B: Marshall

Monitor III A.N.C.

80 of 161 known

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Only differences

ABowers & Wilkins Px7 S3

BMarshall Monitor III A.N.C.

General

6 of 8 differ

Series

Not available

Monitor1Press releasegroup.marshall.com/2024/09/25/marshall-and-billie-joe-armstrong-join-forces-to-unveil-feature-packed-monitor-iii-a-n-c-headphonesRead 23 October 2026

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

301020-54-00-308, 301020-67-00-308, 301020-66-00-308, 301020-83-00-308, 301020-84-00-3081Maker product pagebowerswilkins.com/en-us/product/over-ear-headphones/px7-s3/301020.htmlRead 23 October 2026US store part number 301020-54-00-308 for Anthracite Black. The colour swatches carry 301020-67-00-308 (Canvas White), 301020-66-00-308 (Indigo Blue), 301020-83-00-308 (Frost Blue) and 301020-84-00-308 (Vintage Maroon).

MONITIII, 1006861, 1009077, 10091633Maker product pagemarshall.com/us/en/product/monitor-iii-ancRead 23 October 2026Public maker page product data lists orderable US Black 1006861, Cream 1009077 and Pitch Black 1009163. Regulatory MONITIII comes from FCC filing.

GTIN / EAN

Not available

7340055401777, 73400554114794Retailer pageargos.co.uk/product/3347382/GM-VariantRead 23 October 2026Exact UK Black model 1006861 EAN. Other Argos hardware specs contain errors and are not substituted for maker data.42Retailer pagebhphotovideo.com/c/product/1958585-REG/marshall_1009077_monitor_iii_a_n_c_wireless.html/overviewRead 23 October 2026Exact Cream SKU 1009077 EAN 7340055411479.

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

24 April 20253Press articletheabsolutesound.com/articles/bowers-wilkins-announces-its-all-new-px7-s3Read 23 October 2026Launch announcement from Worthing, UK, dated April 24, 2025. North American price and availability came later.

24 September 20242Press articlenotebookcheck.com/Marshall-stellt-neue-kabellose-ANC-Kopfhoerer-Monitor-III-A-N-C-vor.890514.0.htmlRead 23 October 2026Contemporaneous September 24, 2024 German launch report says announced today. Maker corporate post is dated September 25, one day after stated retail availability.

Status

Available1Maker product pagebowerswilkins.com/en-us/product/over-ear-headphones/px7-s3/301020.htmlRead 23 October 2026In stock on the maker US store at $479, with dealer links.

Available1Press releasegroup.marshall.com/2024/09/25/marshall-and-billie-joe-armstrong-join-forces-to-unveil-feature-packed-monitor-iii-a-n-c-headphonesRead 23 October 2026Launch from September 24, 2024. Current maker page still lists orderable colors.

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

Not available

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

$4495Press articletechradar.com/audio/wireless-headphones/good-news-the-five-star-wireless-headphones-we-rate-higher-than-the-sony-wh-1000xm6-are-finally-available-to-order-in-the-usRead 23 October 2026News dated May 21, 2025: US price $449, orders from bowerswilkins.com, shipping from June 10, 2025. US dollars before sales tax. The maker US page now lists $479.

Not available

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.

€4296Reviewtomsguide.com/audio/bowers-and-wilkins-px7-s3-reviewRead 23 October 2026Review of April 24, 2025: on sale in the UK and EU that day, €429 in the EU. Country and tax treatment are not stated, so it is the EU price as reported.

€3492Press articlenotebookcheck.com/Marshall-stellt-neue-kabellose-ANC-Kopfhoerer-Monitor-III-A-N-C-vor.890514.0.htmlRead 23 October 2026Contemporaneous German launch report names 349 EUR at Marshall and retailers. Consumer price including VAT as published. The Black launch finish is covered. Later Cream and Pitch Black launch prices are not established.

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, GB, DE3Maker product pagemarshall.com/us/en/product/monitor-iii-ancRead 23 October 2026US maker store. UK Black GTIN from Argos and German launch availability from Notebookcheck. Not a global list.

ColoursiThe maker's own colour names

Anthracite Black, Canvas White, Indigo Blue, Frost Blue, Vintage Maroon1Maker product pagebowerswilkins.com/en-us/product/over-ear-headphones/px7-s3/301020.htmlRead 23 October 2026Finishes: Canvas White, Anthracite Black, Indigo Blue, Frost Blue, Vintage Maroon. The launch range was Anthracite Black, Canvas White and Indigo Blue. Frost Blue and Vintage Maroon came later.

Black, Cream, Pitch Black3Maker product pagemarshall.com/us/en/product/monitor-iii-ancRead 23 October 2026Current exact-model maker colorways. Hardware is presented as one marketed model.

Segment

Music1Maker product pagebowerswilkins.com/en-us/product/over-ear-headphones/px7-s3/301020.htmlRead 23 October 2026Sold as high-performance noise-cancelling wireless headphones for music, films and games, with sound quality as the focus.

Music1Press releasegroup.marshall.com/2024/09/25/marshall-and-billie-joe-armstrong-join-forces-to-unveil-feature-packed-monitor-iii-a-n-c-headphonesRead 23 October 2026Maker describes music listening headphones in Monitor line.

Design

1 of 7 differ

Form factor

Over-ear1Maker product pagebowerswilkins.com/en-us/product/over-ear-headphones/px7-s3/301020.htmlRead 23 October 2026Wearing style: Over-ear Noise Cancelling Headphones.

Over-ear5Owner's manualdownloads.ctfassets.net/javen7msabdh/Y4lwjaW2ma8v33Kx2ZXCz/d55009139a27c6786e45675a034af6e2/Marshall-Monitor-III-ANC-All-Languages.pdfRead 23 October 2026Manual cover over-ear headphones.

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

Closed11Measurementrtings.com/headphones/reviews/bowers-wilkins/px7-s3Read 23 October 2026Public header: Enclosure Closed-Back, over-ear, wireless, noise cancelling, mic.

Closed6Reviewsoundguys.com/marshall-monitor-iii-anc-review-a-worthy-alternative-to-sony-and-bose-131654Read 23 October 2026Exact-model FAQ explicitly closed-back headphones.

Wearing style

Headband4Reviewtechradar.com/audio/headphones/bowers-wilkins-px7-s3-reviewRead 23 October 2026Describes a new headband and redesigned arm mechanism.

Headband5Owner's manualdownloads.ctfassets.net/javen7msabdh/Y4lwjaW2ma8v33Kx2ZXCz/d55009139a27c6786e45675a034af6e2/Marshall-Monitor-III-ANC-All-Languages.pdfRead 23 October 2026

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

Flat7Reviewexpertreviews.co.uk/technology/headphones-audio/bowers-wilkins-px7-s3-reviewRead 23 October 2026Build: the headphones fold flat only. The case is slimmer and semi-hard.

Flat and inward5Owner's manualdownloads.ctfassets.net/javen7msabdh/Y4lwjaW2ma8v33Kx2ZXCz/d55009139a27c6786e45675a034af6e2/Marshall-Monitor-III-ANC-All-Languages.pdfRead 23 October 2026Printed page 6 hard-case instructions rotate left/right cups and fold inward until pads meet.

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

Yes7Reviewexpertreviews.co.uk/technology/headphones-audio/bowers-wilkins-px7-s3-reviewRead 23 October 2026Fold flat only means the ear cups rotate flat. SoundGuys says the headphones lie flat in the case.8Reviewsoundguys.com/bowers-and-wilkins-px7-s3-review-an-unexpected-anc-heavyweight-142231Read 23 October 2026Headphones lie flat in the case.

Yes5Owner's manualdownloads.ctfassets.net/javen7msabdh/Y4lwjaW2ma8v33Kx2ZXCz/d55009139a27c6786e45675a034af6e2/Marshall-Monitor-III-ANC-All-Languages.pdfRead 23 October 2026Printed page 6 explicitly rotates left counterclockwise and right clockwise.

RGB lighting

Not available

Not available

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

Not available

Not available

Drivers and sound

9 of 20 differ

Driver type

Dynamic1Maker product pagebowerswilkins.com/en-us/product/over-ear-headphones/px7-s3/301020.htmlRead 23 October 2026Drive units: 2 x 40mm dynamic full range bio cellulose driver.

Dynamic7Maker product pagemarshall.com/us/en/product/monitor-iii-ancRead 23 October 2026

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

40mm1Maker product pagebowerswilkins.com/en-us/product/over-ear-headphones/px7-s3/301020.htmlRead 23 October 2026Drive units: 2 x 40mm dynamic full range bio cellulose driver.

32mm7Maker product pagemarshall.com/us/en/product/monitor-iii-ancRead 23 October 2026

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

11Maker product pagebowerswilkins.com/en-us/product/over-ear-headphones/px7-s3/301020.htmlRead 23 October 20262 x 40 mm drive units across the two ear cups, so one per side.

Not available

Diaphragm material

Bio-cellulose1Maker product pagebowerswilkins.com/en-us/product/over-ear-headphones/px7-s3/301020.htmlRead 23 October 2026Drive units: bio cellulose driver.

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.

Not available

Min20 HzMax20 kHz7Maker product pagemarshall.com/us/en/product/monitor-iii-ancRead 23 October 2026Current single frequency range 20-20,000 Hz. Mode and test tolerance unspecified. Not a wireless passband.

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.

Not available

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.

Not available

46Ω7Maker product pagemarshall.com/us/en/product/monitor-iii-ancRead 23 October 2026Current maker audio specification 46 ohm. Earlier secondary reviews give 35 ohm. Current maker wins. No passive power-off impedance claimed.

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.

Not available

91dB7Maker product pagemarshall.com/us/en/product/monitor-iii-ancRead 23 October 2026Current maker 91 dB SPL at -18 dBFS, 1 kHz. This is not per 1 mW or per 1 V, so sensitivity_reference omitted. Earlier reviewers quote different sensitivity references.

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

Not available

Not available

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

Not available

Not available

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.

96kHz2Owner's manualwerner-musica.com/wp-content/uploads/2025/06/Px7S3_Manual_.pdfRead 23 October 2026Data sheet: USB audio up to 24 bits, 96 kHz.

Not available

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

24bits2Owner's manualwerner-musica.com/wp-content/uploads/2025/06/Px7S3_Manual_.pdfRead 23 October 2026Data sheet: USB audio up to 24 bits, 96 kHz.

Not available

DAC

Not available

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

Not available

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

51Maker product pagebowerswilkins.com/en-us/product/over-ear-headphones/px7-s3/301020.htmlRead 23 October 2026Technical features: 5 band customisable EQ + TrueSound mode.

58Reviewsoundguys.com/marshall-monitor-iii-anc-review-a-worthy-alternative-to-sony-and-bose-131654Read 23 October 2026App section five-band custom playback EQ. HeadphoneCheck corroborates. Five presets are stated but a complete exact name list is not published.

EQ presets

Not available

Bass Boost9Reviewtechradar.com/audio/wireless-headphones/marshall-monitor-iii-anc-reviewRead 23 October 2026Review explicitly names bass boost. Full factory-name list was not independently verified, so only the named option is stored.

Volume limit

Not available

Not available

Spatial audio

1 of 3 differ

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

Soundstage10Maker product pagemarshall.com/us/en/product/monitor-iii-ancRead 23 October 2026Maker named Soundstage spatial processing of stereo content into a virtual room. Head tracking not established.

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

6 of 10 differ

Active noise cancelling

Yes1Maker product pagebowerswilkins.com/en-us/product/over-ear-headphones/px7-s3/301020.htmlRead 23 October 2026Page title: noise-cancelling wireless headphones with advanced noise cancellation.

Yes11Maker product pagemarshall.com/us/en/product/monitor-iii-ancRead 23 October 2026Maker active noise cancellation. No topology or total physical microphone count specified.

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

Hybrid1Maker product pagebowerswilkins.com/en-us/product/over-ear-headphones/px7-s3/301020.htmlRead 23 October 2026Microphones: 4 mics per earcup (1x FB + 2x FF). FB is a feedback microphone and FF is a feedforward microphone, so the ANC uses both.3Press articletheabsolutesound.com/articles/bowers-wilkins-announces-its-all-new-px7-s3Read 23 October 2026Drive-unit microphones (feedback) and ambient microphones (feedforward) are both used.

Not available

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

61Maker product pagebowerswilkins.com/en-us/product/over-ear-headphones/px7-s3/301020.htmlRead 23 October 20261 feedback and 2 feedforward microphones per earcup, which is 6 for ANC. The page counts 4 per earcup, 8 in total. The press launch says two microphones monitor the drivers and four monitor ambient noise.3Press articletheabsolutesound.com/articles/bowers-wilkins-announces-its-all-new-px7-s3Read 23 October 2026Eight microphones in total: two measure each drive unit's output, four monitor ambient noise and two handle voice clarity. That gives six for ANC.7Reviewexpertreviews.co.uk/technology/headphones-audio/bowers-wilkins-px7-s3-reviewRead 23 October 2026Two ambient microphones plus one internal microphone per ear cup, and a pair of voice microphones.

415Reviewnotebookcheck.com/Exklusiv-zum-Markstart-Marshall-Monitor-III-A-N-C-im-Praxis-Test-Tolles-Design-wie-ist-der-Klang.890386.0.htmlRead 23 October 2026Equipment section explicitly four microphones continuously record surrounding noise for ANC, increased from two. It does not establish speech microphone count or physical total.

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

Not available

Yes14Reviewheadphonecheck.com/test/marshall-monitor-iii-a-n-cRead 23 October 2026ANC section explicitly describes adaptive noise cancelling. Maker does not name a specific adaptive ANC mode. Adaptive Loudness remains a separate sound feature.

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

Not available

314Reviewheadphonecheck.com/test/marshall-monitor-iii-a-n-cRead 23 October 2026Controls section explicitly three intensity levels for ANC, separately from three transparency levels. Off is excluded.

ANC attenuation (claimed)

Not available

Not available

Transparency mode

Yes2Owner's manualwerner-musica.com/wp-content/uploads/2025/06/Px7S3_Manual_.pdfRead 23 October 2026Section 3.1: Ambient Pass-Through mode lets you hear outside sound without removing the headphones.3Press articletheabsolutesound.com/articles/bowers-wilkins-announces-its-all-new-px7-s3Read 23 October 2026Modes are Off, Pass-Through and On, with a transparency mode in the app.

Yes11Maker product pagemarshall.com/us/en/product/monitor-iii-ancRead 23 October 2026

Adjustable transparency

Not available

Yes11Maker product pagemarshall.com/us/en/product/monitor-iii-ancRead 23 October 2026Common question Soundstage sliders are not used here. Exact noise-control support guide and SoundGuys explicitly adjustable transparency.13Reviewsoundguys.com/marshall-monitor-iii-anc-review-a-worthy-alternative-to-sony-and-bose-131654Read 23 October 2026Noise cancelling section explicitly three adjustable transparency levels.

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

Yes11Maker product pagemarshall.com/us/en/product/monitor-iii-ancRead 23 October 2026Maker corporate launch explicitly microphones designed to reduce wind noise for ANC and calls. A claim, not a measured attenuation value.12Press releasegroup.marshall.com/2024/09/25/marshall-and-billie-joe-armstrong-join-forces-to-unveil-feature-packed-monitor-iii-a-n-c-headphonesRead 23 October 2026Launch text explicitly reduction of wind noise for ANC and calls.

Measured

7 of 21 differ

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

Boosted bass sound signature. The bass is very emphasized and the treble slightly underemphasized against the RTINGS target.11Measurementrtings.com/headphones/reviews/bowers-wilkins/px7-s3Read 23 October 2026Public header, methodology v2.3, reviewed 2026-01-20: Sound Signature Boosted Bass. Test settings and the full curve are member-only and were not used.

The measured default response has more bass and treble and less midrange than the SoundGuys Preference Curve. ANC off adds some bass.17Reviewsoundguys.com/marshall-monitor-iii-anc-review-a-worthy-alternative-to-sony-and-bose-131654Read 23 October 2026Objective Measurements section. Default profile, nominal level, ANC-on comparison with ANC-off. Firmware and exact codec not published. No chart points converted into numeric dB fields.

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

7dB11Measurementrtings.com/headphones/reviews/bowers-wilkins/px7-s3Read 23 October 2026Public header: Bass Amount Very Emphasized (7 dB) against the RTINGS target curve.

Not available

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

-3dB11Measurementrtings.com/headphones/reviews/bowers-wilkins/px7-s3Read 23 October 2026Public header: Treble Amount Slightly Underemphasized (-3 dB) against the RTINGS target curve.

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

Call quality is on par with competitors. The microphones reject some noise while keeping voice quality, but will not match a dedicated studio microphone.8Reviewsoundguys.com/bowers-and-wilkins-px7-s3-review-an-unexpected-anc-heavyweight-142231Read 23 October 2026Review published 2025-08-13 and updated 2025-11-19. Mic demos in office, street, windy and reverberant settings. The reviewer calls call quality on par with competitors. No microphone measurements are given.

The recorded samples reject background noise well but lose vocal clarity. Loud speech can clip. Wind, street, office and reverberant conditions were tested.17Reviewsoundguys.com/marshall-monitor-iii-anc-review-a-worthy-alternative-to-sony-and-bose-131654Read 23 October 2026Recorded speech samples in simulated office, street, wind and reverberant conditions. Test codec, firmware and capture route are unpublished. The vote count is not a measurement.

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.

ABowers & Wilkins Px7 S3

Connection	ANC	Hours (h)
Bluetooth	Yes	31.92

Source9Measurementsoundguys.com/bowers-and-wilkins-px7-s3-vs-apple-airpods-max-149910Read 23 October 2026SoundGuys test track of real music peaking at 75 dB SPL, ANC on, 31 hours 55 minutes. The article does not name the codec. The only wireless connection is Bluetooth. RTINGS gives 29 hours in its verdict text and does not state its settings in the public part.

BMarshall Monitor III A.N.C.

Connection	ANC	Hours (h)
Bluetooth	Yes	68
Bluetooth	No	110.32

Source16Reviewchip.de/test-kaufberatung/tv-audio/marshall-monitor-iii-a-n-c-im-test_a4725ea6-a9f4-4e8b-aa22-0f51f8c0d1c3.htmlRead 23 October 2026Tested July 11, 2026. Full-runtime table 68 h 00 min ANC on and 110 h 19 min off. CHIP describes continuous fixed-playlist Bluetooth playback at the same calibrated volume across products. Numeric SPL, codec, firmware and spatial-processing state unpublished. 110 h 19 min converted to hours. Partial 15-minute-charge runtimes excluded. SoundGuys could not complete its separate battery test and contributes no runtime.

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

31.92h=CalculatedFrom Measured battery life

110.32h=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

253g(8.9 oz)16Reviewchip.de/test-kaufberatung/tv-audio/marshall-monitor-iii-a-n-c-im-test_a4725ea6-a9f4-4e8b-aa22-0f51f8c0d1c3.htmlRead 23 October 2026Independent CHIP test table 253 g. Cable inclusion not stated. Maker claims 250 g.

Microphone

1 of 16 differ

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

Built-in1Maker product pagebowerswilkins.com/en-us/product/over-ear-headphones/px7-s3/301020.htmlRead 23 October 2026Page: 8 microphones in the ear cups. No boom.

Built-in18Maker product pagemarshall.com/us/en/product/monitor-iii-ancRead 23 October 2026Audio specification explicitly Microphone & Remote yes and maker describes phone-call handling. No unsupported speech-mic count, pattern or element added.

Microphone element

Not available

Not available

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

Not available

Not available

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

Not available

Not available

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.

81Maker product pagebowerswilkins.com/en-us/product/over-ear-headphones/px7-s3/301020.htmlRead 23 October 2026Microphones: 8 mics total, 4 per earcup. The voice-only count is not stored. The page says all mics are used for talk, while the launch coverage names two voice microphones.

Not available

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

Not available

Not available

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

Not available

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.

Not available

Not available

Flip to mute

Not available

Not available

Mute button

Not available

Not available

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

Not available

Sidetone

Not available

Not available

Adjustable sidetone

Not available

Not available

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

Not available

Not available

Connectivity

8 of 20 differ

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

Bluetooth, USB, Analog2Owner's manualwerner-musica.com/wp-content/uploads/2025/06/Px7S3_Manual_.pdfRead 23 October 2026Bluetooth, the USB-C to USB-C cable (USB audio) and the USB-C to 3.5 mm cable (analog source).

Bluetooth, Analog19Owner's manualdownloads.ctfassets.net/javen7msabdh/Y4lwjaW2ma8v33Kx2ZXCz/d55009139a27c6786e45675a034af6e2/Marshall-Monitor-III-ANC-All-Languages.pdfRead 23 October 2026Printed pages 4 and 7 included USB-C-to-3.5 mm cable carries analog source audio. USB-C shape does not imply USB digital playback.

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

3.5 mm TRS2Owner's manualwerner-musica.com/wp-content/uploads/2025/06/Px7S3_Manual_.pdfRead 23 October 2026Section 7.1.1: the supplied cable has a 3.5 mm stereo jack for a source with an analog output.

3.5 mm TRS41Retailer pagebhphotovideo.com/c/product/1854727-REG/marshall_1006861_monitor_iii_anc_wireless.htmlRead 23 October 2026Exact Black 1006861 overview and supplied-items list explicitly USB-C to 3.5 mm TRS cable. Other B&H specification errors such as open-back enclosure and LC3 are not used.

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

USB-C2Owner's manualwerner-musica.com/wp-content/uploads/2025/06/Px7S3_Manual_.pdfRead 23 October 2026Section 7.1.1: the audio cable plugs into the USB-C socket on the right earcup.

USB-C19Owner's manualdownloads.ctfassets.net/javen7msabdh/Y4lwjaW2ma8v33Kx2ZXCz/d55009139a27c6786e45675a034af6e2/Marshall-Monitor-III-ANC-All-Languages.pdfRead 23 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 pagebowerswilkins.com/en-us/product/over-ear-headphones/px7-s3/301020.htmlRead 23 October 2026In box: 1.2m USB-C to 3.5mm stereo jack audio cable and 1.2m USB-C to USB-C cable.

Not available

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 manualwerner-musica.com/wp-content/uploads/2025/06/Px7S3_Manual_.pdfRead 23 October 2026USB-C socket on each earcup, one for the charging and USB cable and one for the audio cable.

USB-C19Owner's manualdownloads.ctfassets.net/javen7msabdh/Y4lwjaW2ma8v33Kx2ZXCz/d55009139a27c6786e45675a034af6e2/Marshall-Monitor-III-ANC-All-Languages.pdfRead 23 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.

Yes2Owner's manualwerner-musica.com/wp-content/uploads/2025/06/Px7S3_Manual_.pdfRead 23 October 2026Section 7.1.2: the headphones work as a USB sound output when connected to a computer with the USB-C cable.

No21Reviewchip.de/test-kaufberatung/tv-audio/marshall-monitor-iii-a-n-c-im-test_a4725ea6-a9f4-4e8b-aa22-0f51f8c0d1c3.htmlRead 23 October 2026Independent exact-model table explicitly USB-C-Audio no. Included 3.5 mm-to-USB-C analog cable is a separate path. ifanr exact review independently explicitly rules out USB Audio.

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.

No2Owner's manualwerner-musica.com/wp-content/uploads/2025/06/Px7S3_Manual_.pdfRead 23 October 2026Note in 7.1.1: the headphones must have enough charge and be on to play from an analog source.6Reviewtomsguide.com/audio/bowers-and-wilkins-px7-s3-reviewRead 23 October 2026No option for wired listening when the battery is dead.

No19Owner's manualdownloads.ctfassets.net/javen7msabdh/Y4lwjaW2ma8v33Kx2ZXCz/d55009139a27c6786e45675a034af6e2/Marshall-Monitor-III-ANC-All-Languages.pdfRead 23 October 2026Printed page 7 requires headphones on before connecting analog cable. HeadphoneCheck and CHIP confirm no passive playback. Tom's Guide claims otherwise, but maker instructions take precedence.

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

None2Owner's manualwerner-musica.com/wp-content/uploads/2025/06/Px7S3_Manual_.pdfRead 23 October 2026No dongle or receiver in the box.

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.

Not available

10m20Maker product pagemarshall.com/us/en/product/monitor-iii-ancRead 23 October 2026Current maker 10 m / 30 ft claim. Meters retained. Conditions not specified.

Bluetooth

5.31Maker product pagebowerswilkins.com/en-us/product/over-ear-headphones/px7-s3/301020.htmlRead 23 October 2026Technical features: Bluetooth 5.3 with aptX Lossless technology.

5.320Maker product pagemarshall.com/us/en/product/monitor-iii-ancRead 23 October 2026

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

SBC, AAC, aptX Classic, aptX HD, aptX Adaptive, aptX Lossless1Maker product pagebowerswilkins.com/en-us/product/over-ear-headphones/px7-s3/301020.htmlRead 23 October 2026Bluetooth codecs: aptX Lossless, aptX Adaptive, aptX HD, aptX Classic, AAC, SBC. SoundGuys says iOS uses AAC only and Android can use the aptX codecs.

SBC, AAC20Maker product pagemarshall.com/us/en/product/monitor-iii-ancRead 23 October 2026Current maker Codecs SBC, MPEG-2 AAC. AAC stored using common catalog spelling. LE Audio-ready is not confirmed current LC3 support.

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.

Yes2Owner's manualwerner-musica.com/wp-content/uploads/2025/06/Px7S3_Manual_.pdfRead 23 October 2026Data sheet lists multipoint connection. Section 5.3: paired with up to two devices, with audio from one at a time.

Yes19Owner's manualdownloads.ctfassets.net/javen7msabdh/Y4lwjaW2ma8v33Kx2ZXCz/d55009139a27c6786e45675a034af6e2/Marshall-Monitor-III-ANC-All-Languages.pdfRead 23 October 2026

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

22Owner's manualwerner-musica.com/wp-content/uploads/2025/06/Px7S3_Manual_.pdfRead 23 October 2026Section 5.3: up to two devices, audio plays from one at a time.

219Owner's manualdownloads.ctfassets.net/javen7msabdh/Y4lwjaW2ma8v33Kx2ZXCz/d55009139a27c6786e45675a034af6e2/Marshall-Monitor-III-ANC-All-Languages.pdfRead 23 October 2026Printed page 8 explicitly two connected devices simultaneously.

Paired devices remembered

Not available

819Owner's manualdownloads.ctfassets.net/javen7msabdh/Y4lwjaW2ma8v33Kx2ZXCz/d55009139a27c6786e45675a034af6e2/Marshall-Monitor-III-ANC-All-Languages.pdfRead 23 October 2026Printed page 8 explicitly remembers eight paired devices.

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 Pair2Owner's manualwerner-musica.com/wp-content/uploads/2025/06/Px7S3_Manual_.pdfRead 23 October 2026Section 5.1.3: pairs with compatible Android devices using Google Fast Pair.

Not available

Base station

Not available

Not available

Latency

None of 2 known

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

Not available

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.

iOS, Android, Windows, macOS2Owner's manualwerner-musica.com/wp-content/uploads/2025/06/Px7S3_Manual_.pdfRead 23 October 2026Sections 5.1.1 and 5.1.2: iPhone, Mac, PC and Android pairing. The app is for iOS and Android.

Android, iOS22Maker product pagemarshall.com/us/en/support/headphones/learn/app-marshall-bluetoothRead 23 October 2026Maker app page lists exact model and Apple App Store/Google Play downloads. Exact-model setup guide requires pairing host device with headphones. No desktop/console audio path inferred.

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.

ABowers & Wilkins Px7 S3

Platform	Connection
iOS	Bluetooth
Android	Bluetooth
Windows	Bluetooth
macOS	Bluetooth
macOS	USB

Source2Owner's manualwerner-musica.com/wp-content/uploads/2025/06/Px7S3_Manual_.pdfRead 23 October 2026Bluetooth pairing for iPhone, Mac, PC and Android. Section 7.1.2 adds USB audio and a Mac setup note. Microphone use per platform is not stated.

BMarshall Monitor III A.N.C.

Platform	Connection
Android	Bluetooth
iOS	Bluetooth

Source22Maker product pagemarshall.com/us/en/support/headphones/learn/app-marshall-bluetoothRead 23 October 2026Supported mobile setup uses Bluetooth pairing. Per-platform call microphone support is left unspecified.

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

Not available

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

No8Reviewsoundguys.com/bowers-and-wilkins-px7-s3-review-an-unexpected-anc-heavyweight-142231Read 23 October 2026Earpads and headband padding are replaceable. The battery and USB-C port are not.

Not available

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

Not available

224Press articlenotebookcheck.com/Marshall-stellt-neue-kabellose-ANC-Kopfhoerer-Monitor-III-A-N-C-vor.890514.0.htmlRead 23 October 2026Exact-model German launch report explicitly a double battery with one pack in each earcup. No per-pack capacity published. No total mAh divided or guessed.

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.

ABowers & Wilkins Px7 S3

Connection	ANC	Hours (h)
Bluetooth	Yes	30

Source1Maker product pagebowerswilkins.com/en-us/product/over-ear-headphones/px7-s3/301020.htmlRead 23 October 202630 hours playback. The manual says 30 hours is with noise cancellation on at medium volume.2Owner's manualwerner-musica.com/wp-content/uploads/2025/06/Px7S3_Manual_.pdfRead 23 October 2026Intro: up to 30 hours of wireless streaming with noise cancellation on at medium volume levels. Bluetooth codec is not stated.

BMarshall Monitor III A.N.C.

Connection	ANC	Hours (h)
Bluetooth	Yes	70
Bluetooth	No	100

Source23Maker product pagemarshall.com/us/en/product/monitor-iii-ancRead 23 October 2026Current maker battery specification explicitly Bluetooth plus ANC 70 h and Bluetooth only 100 h. Volume, codec, spatial processing and firmware not stated.

Battery life (claimed, max)

30h=CalculatedFrom Claimed battery life

100h=CalculatedFrom Claimed battery life

Battery life with ANC (claimed)

30h=CalculatedFrom Claimed battery life

70h=CalculatedFrom Claimed battery life

Battery life without ANC (claimed)

Not available

100h=CalculatedFrom Claimed battery life

Charging port

USB-C2Owner's manualwerner-musica.com/wp-content/uploads/2025/06/Px7S3_Manual_.pdfRead 23 October 2026Section 4: USB-C socket on the left earcup.

USB-C23Maker product pagemarshall.com/us/en/product/monitor-iii-ancRead 23 October 2026

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

120min2Owner's manualwerner-musica.com/wp-content/uploads/2025/06/Px7S3_Manual_.pdfRead 23 October 2026Section 4: wait up to 2 hours for a full charge.

150min23Maker product pagemarshall.com/us/en/product/monitor-iii-ancRead 23 October 2026Maker 2.5 h to full recharge converted exactly to 150 minutes.

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

15min1Maker product pagebowerswilkins.com/en-us/product/over-ear-headphones/px7-s3/301020.htmlRead 23 October 202630 hours playback, 7 hours with a 15 min charge.

15min23Maker product pagemarshall.com/us/en/product/monitor-iii-ancRead 23 October 2026

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

7h1Maker product pagebowerswilkins.com/en-us/product/over-ear-headphones/px7-s3/301020.htmlRead 23 October 202630 hours playback, 7 hours with a 15 min charge.

12h23Maker product pagemarshall.com/us/en/product/monitor-iii-ancRead 23 October 2026Maker 15 minutes supplies 12 hours. ANC, codec and volume unspecified.

Use while charging

Yes2Owner's manualwerner-musica.com/wp-content/uploads/2025/06/Px7S3_Manual_.pdfRead 23 October 2026Section 4: the headphones can be used while charging.

Not available

Charging dock or stand

Not available

Not available

Controls

2 of 6 differ

Controls

Buttons2Owner's manualwerner-musica.com/wp-content/uploads/2025/06/Px7S3_Manual_.pdfRead 23 October 2026Right earcup has volume up, volume down and a multifunction button. The left earcup has a power slider and a quick action button.

Buttons25Owner's manualdownloads.ctfassets.net/javen7msabdh/Y4lwjaW2ma8v33Kx2ZXCz/d55009139a27c6786e45675a034af6e2/Marshall-Monitor-III-ANC-All-Languages.pdfRead 23 October 2026Printed pages 4-5 two buttons and multidirectional control knob. Knob moves by directional pushes, not a rotating dial or wheel. No schema joystick option exists.

Volume control

Buttons2Owner's manualwerner-musica.com/wp-content/uploads/2025/06/Px7S3_Manual_.pdfRead 23 October 2026Volume up and volume down buttons on the right earcup.

Not available

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.

Yes2Owner's manualwerner-musica.com/wp-content/uploads/2025/06/Px7S3_Manual_.pdfRead 23 October 2026Section 6.2.5: the quick action button can be customised in the app.

Yes25Owner's manualdownloads.ctfassets.net/javen7msabdh/Y4lwjaW2ma8v33Kx2ZXCz/d55009139a27c6786e45675a034af6e2/Marshall-Monitor-III-ANC-All-Languages.pdfRead 23 October 2026Printed page 5 M-button assignment in app. Default Spotify Tap.

Wear detection

Yes2Owner's manualwerner-musica.com/wp-content/uploads/2025/06/Px7S3_Manual_.pdfRead 23 October 2026Section 3.3: wear sensors on both sides pause playback and enter low power standby when removed.

Yes26Reviewsoundguys.com/marshall-monitor-iii-anc-review-a-worthy-alternative-to-sony-and-bose-131654Read 23 October 2026Controls section explicitly wear sensor and automatic playback pause when removed.

Voice assistant

Voice assistant of the connected device2Owner's manualwerner-musica.com/wp-content/uploads/2025/06/Px7S3_Manual_.pdfRead 23 October 2026Section 3.2: the quick action button can call the voice assistant of the connected device.

Phone's voice assistant43Maker product pagemarshall.com/us/en/product/monitor-iii-ancRead 23 October 2026Customisable M-button activates the phone's voice assistant. Maker names no specific service. It is host activation, separate from the Voice command No row for built-in voice control.

Comfort and build

6 of 11 differ

Headband type

Padded4Reviewtechradar.com/audio/headphones/bowers-wilkins-px7-s3-reviewRead 23 October 2026The headband is described as nicely padded, with a new headband and arm mechanism. The inner section of the headband can be replaced.

Not available

Headband material

Fabric outer, memory foam padding under synthetic leather4Reviewtechradar.com/audio/headphones/bowers-wilkins-px7-s3-reviewRead 23 October 2026Fabric around the outside of the headband and earcups, with pleather over memory foam at the contact points.

Silicone inner headband27Reviewnotebookcheck.com/Exklusiv-zum-Markstart-Marshall-Monitor-III-A-N-C-im-Praxis-Test-Tolles-Design-wie-ist-der-Klang.890386.0.htmlRead 23 October 2026Design section explicitly silicone inner band attached at the sides. Does not establish outer upholstery material.

Frame material

Not available

Not available

Ear cup material

Plastic with fabric finish10Spec databasesoundguys.com/product/bowers-and-wilkins-px7-s3Read 23 October 2026Spec table: ear cups pleather over memory foam. Tom's Guide describes premium-feeling plastic and the maker lists a fabric finish.

Plastic27Reviewnotebookcheck.com/Exklusiv-zum-Markstart-Marshall-Monitor-III-A-N-C-im-Praxis-Test-Tolles-Design-wie-ist-der-Klang.890386.0.htmlRead 23 October 2026Design section explicitly flexible plastic cup shell. Decorative leather-like texture is not treated as leather shell.

Ear pad material

Memory foam with synthetic leather4Reviewtechradar.com/audio/headphones/bowers-wilkins-px7-s3-reviewRead 23 October 2026Pleather over memory foam contact points.6Reviewtomsguide.com/audio/bowers-and-wilkins-px7-s3-reviewRead 23 October 2026Memory foam earcups with soft synthetic alternatives, no leather.

Vegan leather and foam28Retailer pageargos.co.uk/product/3347382/GM-VariantRead 23 October 2026Exact Black listing names Vegan Leather and Foam ear pieces. Not interpreted as natural leather.

Replaceable ear pads

Yes4Reviewtechradar.com/audio/headphones/bowers-wilkins-px7-s3-reviewRead 23 October 2026The inner section of the headband and the earpads can be removed and replaced by a trained service engineer, not by the user.8Reviewsoundguys.com/bowers-and-wilkins-px7-s3-review-an-unexpected-anc-heavyweight-142231Read 23 October 2026Earpads and headband padding are replaceable.

Yes29Owner's manualdownloads.ctfassets.net/javen7msabdh/2hCtX2YRHbepO0vP6hwRex/437db6a71a057973414ed7d097217311/Monitor-III-ANC-spareparts_user-manual_all-languages.pdfRead 23 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

Twist lock29Owner's manualdownloads.ctfassets.net/javen7msabdh/2hCtX2YRHbepO0vP6hwRex/437db6a71a057973414ed7d097217311/Monitor-III-ANC-spareparts_user-manual_all-languages.pdfRead 23 October 2026Printed page 3 rotate anticlockwise to remove and clockwise to lock.

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

Not available

Ear tips included

Not available

Not available

Dust and water rating

Not available

Not available

User-replaceable parts

Not available

Ear cushions, Inner headband29Owner's manualdownloads.ctfassets.net/javen7msabdh/2hCtX2YRHbepO0vP6hwRex/437db6a71a057973414ed7d097217311/Monitor-III-ANC-spareparts_user-manual_all-languages.pdfRead 23 October 2026Printed pages 3-5 exact replacement procedures. Inner headband uses T5 Torx screwdriver. Battery is not in this user replacement manual.

Software

2 of 3 differ

Companion app

Bowers & Wilkins Music2Owner's manualwerner-musica.com/wp-content/uploads/2025/06/Px7S3_Manual_.pdfRead 23 October 2026Section 6: Bowers & Wilkins Music app.

Marshall Bluetooth30Maker product pagemarshall.com/us/en/support/headphones/learn/app-marshall-bluetoothRead 23 October 2026

App platforms

iOS, Android2Owner's manualwerner-musica.com/wp-content/uploads/2025/06/Px7S3_Manual_.pdfRead 23 October 2026Section 6: free for iOS and Android.

Android, iOS30Maker product pagemarshall.com/us/en/support/headphones/learn/app-marshall-bluetoothRead 23 October 2026Maker lists exact model with Apple App Store and Google Play links.

User firmware updates

Yes2Owner's manualwerner-musica.com/wp-content/uploads/2025/06/Px7S3_Manual_.pdfRead 23 October 2026Section 6.3: software updates are delivered through the app.

Yes30Maker product pagemarshall.com/us/en/support/headphones/learn/app-marshall-bluetoothRead 23 October 2026Exact-model support page explicitly app firmware updates.31Maker product pagemarshall.com/us/en/support/headphones/support-for-monitor-iii-ancRead 23 October 2026Update the firmware section explicitly app updates for Monitor III A.N.C.

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.

300g(10.6 oz)1Maker product pagebowerswilkins.com/en-us/product/over-ear-headphones/px7-s3/301020.htmlRead 23 October 2026Net weight 300g (without carry case).

250g(8.8 oz)32Maker product pagemarshall.com/us/en/product/monitor-iii-ancRead 23 October 2026Current maker physical-unit table 250 g. No cable qualification stated. SoundGuys and CHIP measured information stays separate.

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

1 of 3 differ

Hi-Res Audio

Not available

Not available

Communication certifications

Not available

Not available

FCC ID

Not available

2BBQK-MONITIII33Regulatory filingfccid.io/2BBQK-MONITIIIRead 23 October 2026Public FCC filing index for exact MONITIII headphone, approved April 29, 2024. Referenced label/internal documents could not be downloaded because of access denial. No hidden exhibit data used.

Other certifications

Apple MFi (Made for iPhone)2Owner's manualwerner-musica.com/wp-content/uploads/2025/06/Px7S3_Manual_.pdfRead 23 October 2026Data sheet technical features: Apple MFi Made For iPhone.

Not available

In the box

2 of 3 differ

In the box

Px7 S3 wireless over-ear headphones, Carry case, USB-C to USB-C charging cable, USB-C to 3.5 mm audio cable, Documentation1Maker product pagebowerswilkins.com/en-us/product/over-ear-headphones/px7-s3/301020.htmlRead 23 October 2026In box accessories: 1.2m USB-C to 3.5mm stereo jack audio cable, 1.2m USB-C to USB-C cable, carry case. The manual also lists the documentation.

Monitor III A.N.C. Headphones, USB-C charging cable, USB-C to 3.5mm audio cord, Quick start guide, Legal and Safety Information, Carrying case34Maker product pagemarshall.com/us/en/product/monitor-iii-ancRead 23 October 2026

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

ABowers & Wilkins Px7 S3

Type	Length (m)	Count
USB-C to USB-C cable	1.2	1
USB-C to 3.5 mm stereo jack audio cable	1.2	1

Source1Maker product pagebowerswilkins.com/en-us/product/over-ear-headphones/px7-s3/301020.htmlRead 23 October 2026Both 1.2 m cables are listed under in box accessories.

BMarshall Monitor III A.N.C.

Type	Length (m)	Count
USB-C to USB-C charging cable	0.21	1
USB-C to 3.5 mm stereo audio cable	Not available	1

Source34Maker product pagemarshall.com/us/en/product/monitor-iii-ancRead 23 October 2026Maker box list confirms both cables. Manual page 4 confirms USB-C-to-USB-C charging lead. HeadphoneCheck states 21 cm charging lead. Audio length is omitted because HeadphoneCheck says 120 cm and SoundGuys says 122 cm while maker is silent.35Reviewheadphonecheck.com/test/marshall-monitor-iii-a-n-cRead 23 October 2026Scope of delivery explicitly charging cable 21 cm and analog cable 120 cm. Only uncontested charging length retained. SoundGuys metadata says 122 cm for analog cable.

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

Hard1Maker product pagebowerswilkins.com/en-us/product/over-ear-headphones/px7-s3/301020.htmlRead 23 October 2026Carry case is in the box. Tom's Guide calls it a hard case. Expert Reviews calls it semi-hard.6Reviewtomsguide.com/audio/bowers-and-wilkins-px7-s3-reviewRead 23 October 2026Verdict lists the best hard case yet. The case has a magnetically closing section for the cables.

Hard34Maker product pagemarshall.com/us/en/product/monitor-iii-ancRead 23 October 2026Maker explicitly hard case, also described in manual page 6.

Links

Not compared

Product page

www.bowerswilkins.com/en-us/product/over-ear-headphones/px7-s3/301020.html1Maker product pagebowerswilkins.com/en-us/product/over-ear-headphones/px7-s3/301020.htmlRead 23 October 2026

www.marshall.com/us/en/product/monitor-iii-anc36Maker product pagemarshall.com/us/en/product/monitor-iii-ancRead 23 October 2026

Spec sheet

Not available

www.marshall.com/us/en/product/monitor-iii-anc36Maker product pagemarshall.com/us/en/product/monitor-iii-ancRead 23 October 2026

Manual

werner-musica.com/wp-content/uploads/2025/06/Px7S3_Manual_.pdf2Owner's manualwerner-musica.com/wp-content/uploads/2025/06/Px7S3_Manual_.pdfRead 23 October 2026Owner's manual, Spanish copy hosted by a retailer, with the data sheet on the last page. An English copy exists on the maker support site.

downloads.ctfassets.net/javen7msabdh/Y4lwjaW2ma8v33Kx2ZXCz/d55009139a27c6786e45675a034af6e2/Marshall-Monitor-III-ANC-All-Languages.pdf36Maker product pagemarshall.com/us/en/product/monitor-iii-ancRead 23 October 2026

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

Not available

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.

Not available

1year37Maker product pagemarshall.com/us/en/support/warrantyRead 23 October 2026US support default warranty one year from purchase. Online Marshall purchases receive an exclusive two-year term. Base field stores default term, separate from legal guarantees.

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