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Marshall Monitor III A.N.C. vs Sony ULT WEAR

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Product A: Marshall

Monitor III A.N.C.

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B

Product B: Sony

ULT WEAR

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Every value links to where we found it.

Only differences

AMarshall Monitor III A.N.C.

BSony ULT WEAR

General

6 of 8 differ

Series

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

ULT POWER SOUND10Press releasesony.mediaroom.com/2024-04-11-Sony-Electronics-Introduces-ULT-POWER-SOUND-R-,-A-New-Series-of-Speakers-and-Headphones-to-bring-Massive-Bass-and-the-Ultimate-VibeRead 5 October 2026

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

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.

WH-ULT900N2Maker product pagesony.co.uk/electronics/support/wireless-headphones-bluetooth-headphones/wh-ult900n/specificationsRead 5 October 2026Official support specification identity WH-ULT900N / ULT WEAR. Exact marketed model, not WH-XB910N.

GTIN / EAN

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.

Not available

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

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.

11 April 202410Press releasesony.mediaroom.com/2024-04-11-Sony-Electronics-Introduces-ULT-POWER-SOUND-R-,-A-New-Series-of-Speakers-and-Headphones-to-bring-Massive-Bass-and-the-Ultimate-VibeRead 5 October 2026Maker launch date April 11, 2024. Planned Spring availability alone is not used as actual retail month.

Status

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.

Available3Maker product pagesony.jp/headphone/products/ULT_WEARRead 5 October 2026Current Japanese maker store page offers purchase and next-day shipment.

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.

Not available

$199.9910Press releasesony.mediaroom.com/2024-04-11-Sony-Electronics-Introduces-ULT-POWER-SOUND-R-,-A-New-Series-of-Speakers-and-Headphones-to-bring-Massive-Bass-and-the-Ultimate-VibeRead 5 October 2026Exact Sony US launch release gives suggested retail price 199.99 USD for ULT WEAR. US price before local sales tax. Canada 349.99 and speaker prices are not substituted. Other markets without verified tax scope 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.

€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.

Not available

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

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.

US10Press releasesony.mediaroom.com/2024-04-11-Sony-Electronics-Introduces-ULT-POWER-SOUND-R-,-A-New-Series-of-Speakers-and-Headphones-to-bring-Massive-Bass-and-the-Ultimate-VibeRead 5 October 2026

ColoursiThe maker's own colour names

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.

Black, Off White, Forest Gray3Maker product pagesony.jp/headphone/products/ULT_WEARRead 5 October 2026Exact current three finish swatches, also confirmed US launch release.

Segment

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.

Music10Press releasesony.mediaroom.com/2024-04-11-Sony-Electronics-Introduces-ULT-POWER-SOUND-R-,-A-New-Series-of-Speakers-and-Headphones-to-bring-Massive-Bass-and-the-Ultimate-VibeRead 5 October 2026

Design

0 of 7 differ

Form factor

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

Over-ear10Press releasesony.mediaroom.com/2024-04-11-Sony-Electronics-Introduces-ULT-POWER-SOUND-R-,-A-New-Series-of-Speakers-and-Headphones-to-bring-Massive-Bass-and-the-Ultimate-VibeRead 5 October 2026Maker explicitly balanced over-ear comfort and foldable headphone design.

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

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

Closed1Maker product pagesony.jp/headphone/products/ULT_WEAR/spec.htmlRead 5 October 2026

Wearing style

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

Headband10Press releasesony.mediaroom.com/2024-04-11-Sony-Electronics-Introduces-ULT-POWER-SOUND-R-,-A-New-Series-of-Speakers-and-Headphones-to-bring-Massive-Bass-and-the-Ultimate-VibeRead 5 October 2026

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

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.

Flat and inward6Owner's manualhelpguide.sony.net/mdr/2981/v1/en/print.pdfRead 5 October 2026Page 10 expressly rotate both units flat and fold one toward headband. Maker feature 4 confirms folding and swivel structure.

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

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.

Yes6Owner's manualhelpguide.sony.net/mdr/2981/v1/en/print.pdfRead 5 October 2026

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

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

Dynamic1Maker product pagesony.jp/headphone/products/ULT_WEAR/spec.htmlRead 5 October 2026

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

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

40mm1Maker product pagesony.jp/headphone/products/ULT_WEAR/spec.htmlRead 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

Neodymium1Maker product pagesony.jp/headphone/products/ULT_WEAR/spec.htmlRead 5 October 2026

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.

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.

Min5 HzMax20 kHz1Maker product pagesony.jp/headphone/products/ULT_WEAR/spec.htmlRead 5 October 2026Maker specification JEITA 5 Hz-20 kHz. Manual page 142 identifies the same numerical range as powered wired IEC response. No wireless or passive 40 kHz response is claimed.

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

Min20 HzMax20 kHz1Maker product pagesony.jp/headphone/products/ULT_WEAR/spec.htmlRead 5 October 2026A2DP transmission range 20 Hz-20 kHz at 44.1 kHz sampling. This is not a measured acoustic bandwidth.

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.

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.

32Ω1Maker product pagesony.jp/headphone/products/ULT_WEAR/spec.htmlRead 5 October 2026Passive wired power-off impedance 32 ohms at 1 kHz. Powered wired impedance is 314 ohms and is not mixed with the passive value.

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.

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.

100dB1Maker product pagesony.jp/headphone/products/ULT_WEAR/spec.htmlRead 5 October 2026Passive wired power-off 100 dB/mW at 1 kHz. Powered wired sensitivity is 110 dB/mW.

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

Not available

Per 1 mW1Maker product pagesony.jp/headphone/products/ULT_WEAR/spec.htmlRead 5 October 2026

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.

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

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.

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.

Not available

EQ presets

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.

Not available

Volume limit

Not available

Not available

Spatial audio

2 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.

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.

360 Reality Audio5Maker product pagesony.jp/headphone/products/ULT_WEAR/feature_3.htmlRead 5 October 2026Exact product features identify 360 Reality Audio certified model. Manual page 79 requires compatible paid streaming service on iOS/Android, not a permanently included service license.

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

Yes5Maker product pagesony.jp/headphone/products/ULT_WEAR/feature_3.htmlRead 5 October 2026Exact head-tracking feature describes spatial sound with compatible Android devices and services. It is not universal tracking on all platforms.

Noise cancelling

2 of 10 differ

Active noise cancelling

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

Yes4Maker product pagesony.jp/headphone/products/ULT_WEAR/feature_2.htmlRead 5 October 2026

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

Not available

Hybrid4Maker product pagesony.jp/headphone/products/ULT_WEAR/feature_2.htmlRead 5 October 2026Exact Dual Noise Sensor paragraph specifies two feedforward plus two feedback microphones across both housings. Four physical ANC microphones.

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

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.

44Maker product pagesony.jp/headphone/products/ULT_WEAR/feature_2.htmlRead 5 October 2026

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

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.

Yes4Maker product pagesony.jp/headphone/products/ULT_WEAR/feature_2.htmlRead 5 October 2026Behavior and location recognition automatically changes listening/noise-control settings. Manual page 108 expressly calls this auto noise adjustment Adaptive Sound Control. No automatic fit optimizer is inferred.

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

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.

Not available

ANC attenuation (claimed)

Not available

Not available

Transparency mode

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

Yes4Maker product pagesony.jp/headphone/products/ULT_WEAR/feature_2.htmlRead 5 October 2026

Adjustable transparency

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.

Yes4Maker product pagesony.jp/headphone/products/ULT_WEAR/feature_2.htmlRead 5 October 2026Voice Focus on/off and adjustable ambient sound controls. Numerical ANC attenuation and ANC level count are not stated.

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

Not available

Not available

Wind noise reduction

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.

Yes4Maker product pagesony.jp/headphone/products/ULT_WEAR/feature_2.htmlRead 5 October 2026Redesigned microphone surround reduces wind noise in ANC, ambient and call listening. Maker footnote explicitly says this structure does not reduce noise for the remote call participant.

Measured

5 of 21 differ

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

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.

The reviewed unit emphasizes bass. ULT modes further raise the low end, while the reviewer describes reduced upper-detail clarity.9Reviewsoundguys.com/sony-ult-wear-review-113412Read 5 October 2026Same exact review unit and firmware, reviewer frequency-response analysis. No graph coordinates or rating converted into dB values.

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

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.

The recorded samples show wind sensitivity and pickup of nearby noise, despite the microphone windscreens.9Reviewsoundguys.com/sony-ult-wear-review-113412Read 5 October 2026Same exact unit, recorded ideal, office, street, wind and reverberant samples. Qualitative observations do not establish numeric bandwidth or noise-handling scores.

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.

AMarshall 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.

BSony ULT WEAR

Connection	Hours (h)
Bluetooth	32.58

Source9Reviewsoundguys.com/sony-ult-wear-review-113412Read 5 October 2026Provided review unit tested six days, firmware 1.0.8, Headphones Connect 10.4.1. Standardized playback peaking at 75 dB lasted 32 h 35 min, stored 32.58 h rounded. ANC state, codec and ULT mode not explicitly named for this run and not guessed.

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

110.32h=CalculatedFrom Measured battery life

32.58h=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.

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.

Not available

Microphone

6 of 16 differ

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

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.

Built-in1Maker product pagesony.jp/headphone/products/ULT_WEAR/spec.htmlRead 5 October 2026

Microphone element

Not available

Electret condenser1Maker product pagesony.jp/headphone/products/ULT_WEAR/spec.htmlRead 5 October 2026Exact microphone section explicitly electret condenser, not MEMS borrowed from the 1000X series.

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

Not available

Omnidirectional1Maker product pagesony.jp/headphone/products/ULT_WEAR/spec.htmlRead 5 October 2026

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

Not available

24Maker product pagesony.jp/headphone/products/ULT_WEAR/feature_2.htmlRead 5 October 2026Voice pickup paragraph explicitly describes two microphones aligned toward the mouth. This is the voice system count, separate from four ANC microphones.

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.

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

DSP4Maker product pagesony.jp/headphone/products/ULT_WEAR/feature_2.htmlRead 5 October 2026Maker explicitly advanced voice signal processing with beamforming microphones and sensors. No AI inference from DSEE or generic processor branding.

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

Yes6Owner's manualhelpguide.sony.net/mdr/2981/v1/en/print.pdfRead 5 October 2026

Adjustable sidetone

Not available

Yes6Owner's manualhelpguide.sony.net/mdr/2981/v1/en/print.pdfRead 5 October 2026Page 108 explicitly sidetone on/off through app. This proves a switch, not a continuously adjustable mix level.

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

Not available

Not available

Connectivity

7 of 20 differ

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

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, Bluetooth1Maker product pagesony.jp/headphone/products/ULT_WEAR/spec.htmlRead 5 October 2026

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

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.

3.5 mm TRS1Maker product pagesony.jp/headphone/products/ULT_WEAR/spec.htmlRead 5 October 2026Maker stereo mini plug and manual three-contact plug illustration. USB-C is charging only.

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

USB-C19Owner's manualdownloads.ctfassets.net/javen7msabdh/Y4lwjaW2ma8v33Kx2ZXCz/d55009139a27c6786e45675a034af6e2/Marshall-Monitor-III-ANC-All-Languages.pdfRead 23 October 2026

3.5 mm1Maker product pagesony.jp/headphone/products/ULT_WEAR/spec.htmlRead 5 October 2026

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

Not available

1.2m1Maker product pagesony.jp/headphone/products/ULT_WEAR/spec.htmlRead 5 October 202614Maker product pagesony.jp/headphone/products/ULT_WEARRead 8 October 2026The complete maker accessory list establishes supplied lengths of approximately 1.2 m and 0.2 m, so the existing 1.2 m longest-supplied-cable value is supported.

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-C19Owner's manualdownloads.ctfassets.net/javen7msabdh/Y4lwjaW2ma8v33Kx2ZXCz/d55009139a27c6786e45675a034af6e2/Marshall-Monitor-III-ANC-All-Languages.pdfRead 23 October 2026

USB-C6Owner's manualhelpguide.sony.net/mdr/2981/v1/en/print.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.

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.

No9Reviewsoundguys.com/sony-ult-wear-review-113412Read 5 October 2026Connectivity explicitly no audio over USB. USB-C charging only.

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.

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.

Yes6Owner's manualhelpguide.sony.net/mdr/2981/v1/en/print.pdfRead 5 October 2026Page 72 explicitly music when powered off. ANC and ULT bass control require power. Wired calls use phone microphone, not headphone voice pickup.

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

Not available

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.

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

10m1Maker product pagesony.jp/headphone/products/ULT_WEAR/spec.htmlRead 5 October 2026Approximately 10 m line of sight, confirmed manual page 142. Environmental range is not guaranteed.

Bluetooth

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

5.21Maker product pagesony.jp/headphone/products/ULT_WEAR/spec.htmlRead 5 October 2026

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

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.

SBC, AAC, LDAC1Maker product pagesony.jp/headphone/products/ULT_WEAR/spec.htmlRead 5 October 2026

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.

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

Yes6Owner's manualhelpguide.sony.net/mdr/2981/v1/en/print.pdfRead 5 October 2026Pages 70-71 two simultaneously connected devices and one playing source. Original guide says LDAC is unavailable with multipoint enabled. Do not treat all codecs and simultaneous routes as unrestricted.

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

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.

26Owner's manualhelpguide.sony.net/mdr/2981/v1/en/print.pdfRead 5 October 2026

Paired devices remembered

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.

86Owner's manualhelpguide.sony.net/mdr/2981/v1/en/print.pdfRead 5 October 2026Page 67 explicitly up to eight stored devices, with ninth overwriting oldest connection.

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

Not available

Google Fast Pair, Microsoft Swift Pair7Maker product pagesony.jp/headphone/products/ULT_WEAR/feature_5.htmlRead 5 October 2026Exact Google Fast Pair Android feature and Windows 10/11 Swift Pair feature. Pairing support does not establish every application compatibility.

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.

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.

Windows, macOS, Android, iOS6Owner's manualhelpguide.sony.net/mdr/2981/v1/en/print.pdfRead 5 October 2026Exact guide has separate Android, iPhone, Windows 10/11 and macOS pairing chapters. Universal analog jack availability is not used to infer console licensing or supported console microphones.

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.

AMarshall 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.

BSony ULT WEAR

Platform	Connection
Windows	Bluetooth
macOS	Bluetooth
Android	Bluetooth
iOS	Bluetooth

Source6Owner's manualhelpguide.sony.net/mdr/2981/v1/en/print.pdfRead 5 October 2026

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.

Not available

Not available

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

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.

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.

AMarshall 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.

BSony ULT WEAR

Connection	ANC	Codec	Hours (h)
Bluetooth	Yes	AAC	30
Bluetooth	No	AAC	50
Bluetooth	Yes	SBC	30
Bluetooth	No	SBC	50
Bluetooth	Yes	LDAC	25
Bluetooth	No	LDAC	40
Analog	Yes	Not available	30
Analog	No	Not available	50

Source12Owner's manualhelpguide.sony.net/mdr/2981/v1/en/print.pdfRead 8 October 2026Printed page 25 of the current exact ULT WEAR Help Guide gives music playback after a full charge. AAC and SBC each allow up to 30 hours with ANC on or 50 hours with ANC and Ambient Sound Mode off. LDAC allows 25 hours with ANC on or 40 hours with both modes off. Powered analog playback allows 30 hours with ANC on or 50 hours with both modes off. Each named codec is retained in its own row. Page 26 warns that Equalizer, DSEE, voice-assistant wake words, Service Link, and the ULT Bass Control function shorten these maxima. Playback volume and LDAC bitrate are unspecified. Communication durations are excluded. The maker guide explicitly covers the ULT WEAR reference, including original model YY2981.14Maker product pagesony.jp/headphone/products/ULT_WEARRead 8 October 2026The Japanese product headline explicitly qualifies its AAC 30-hour ANC-on and 50-hour ANC-off claims with DSEE and equalizer off and other functions at their defaults. These named settings apply to that AAC claim. LDAC and SBC rows retain the separate current manual conditions, without inheriting this AAC-specific footnote.

Battery life (claimed, max)

100h=CalculatedFrom Claimed battery life

50h=CalculatedFrom Claimed battery life

Battery life with ANC (claimed)

70h=CalculatedFrom Claimed battery life

30h=CalculatedFrom Claimed battery life

Battery life without ANC (claimed)

100h=CalculatedFrom Claimed battery life

50h=CalculatedFrom Claimed battery life

Charging port

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

USB-C6Owner's manualhelpguide.sony.net/mdr/2981/v1/en/print.pdfRead 5 October 2026

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

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

210min6Owner's manualhelpguide.sony.net/mdr/2981/v1/en/print.pdfRead 5 October 2026Page 23 explicitly empty battery to full capacity in about 3.5 hours, 210 minutes, using supplied cable and adapter supplying at least 0.5 A.

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

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

10min6Owner's manualhelpguide.sony.net/mdr/2981/v1/en/print.pdfRead 5 October 2026

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

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

5h6Owner's manualhelpguide.sony.net/mdr/2981/v1/en/print.pdfRead 5 October 2026Page 25 explicitly 10-minute charge for about 5 hours music. Same page separately gives 3 minutes for 90 minutes. No codec or ANC state stated for quick charge.

Use while charging

Not available

No6Owner's manualhelpguide.sony.net/mdr/2981/v1/en/print.pdfRead 5 October 2026Pages 23-24 headset automatically turns off and all operations including playback are disabled while connected to charging power.

Charging dock or stand

Not available

Not available

Controls

3 of 6 differ

Controls

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.

Buttons, Touch6Owner's manualhelpguide.sony.net/mdr/2981/v1/en/print.pdfRead 5 October 2026

Volume control

Not available

Touch1Maker product pagesony.jp/headphone/products/ULT_WEAR/spec.htmlRead 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.

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.

Yes6Owner's manualhelpguide.sony.net/mdr/2981/v1/en/print.pdfRead 5 October 2026Pages 108-109 voice assistant, Quick Access, touch control enable/disable and NC/ambient button cycle can be configured. This does not imply arbitrary physical button remapping.

Wear detection

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.

Yes6Owner's manualhelpguide.sony.net/mdr/2981/v1/en/print.pdfRead 5 October 2026Pages 15-17 built-in proximity sensor, automatic pause/resume and power off after removal.

Voice assistant

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.

Google Assistant, Amazon Alexa, Google app, Siri6Owner's manualhelpguide.sony.net/mdr/2981/v1/en/print.pdfRead 5 October 2026Pages 99-107 separate Google Assistant, Alexa, Android Google app and iPhone Siri chapters. Google Assistant is Android only. Google app/Siri activate by touch, not their wake words. App/network/region eligibility and mutually exclusive assigned assistants apply.

Comfort and build

6 of 11 differ

Headband type

Not available

Not available

Headband material

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.

Not available

Frame material

Not available

Not available

Ear cup material

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.

Matte plastic9Reviewsoundguys.com/sony-ult-wear-review-113412Read 5 October 2026Exact use section explicitly matte plastic outside ear cups. No generic material is assigned to other parts.

Ear pad material

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.

Faux leather9Reviewsoundguys.com/sony-ult-wear-review-113412Read 5 October 2026Exact ear pad paragraph explicitly padding covered in faux leather.

Replaceable ear pads

Yes29Owner's manualdownloads.ctfassets.net/javen7msabdh/2hCtX2YRHbepO0vP6hwRex/437db6a71a057973414ed7d097217311/Monitor-III-ANC-spareparts_user-manual_all-languages.pdfRead 23 October 2026

Not available

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.

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.

Not available

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

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.

Not available

Software

1 of 3 differ

Companion app

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

Sony | Sound Connect8Maker product pagesony.jp/headphone/products/ULT_WEAR/feature_6.htmlRead 5 October 2026Exact current product page names Sound Connect, formerly Headphones Connect. The 2024 manual uses the older app name. No app EQ profile persistence or complete preset list inferred from two example names.

App platforms

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.

Android, iOS6Owner's manualhelpguide.sony.net/mdr/2981/v1/en/print.pdfRead 5 October 2026Page 110 Apple App Store and Google Play listings. Desktop computer playback is distinct from mobile companion app support.

User firmware updates

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.

Yes6Owner's manualhelpguide.sony.net/mdr/2981/v1/en/print.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.

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.

255g(9 oz)1Maker product pagesony.jp/headphone/products/ULT_WEAR/spec.htmlRead 5 October 2026Approximate maker weight excluding cable. SoundGuys metadata 253 g is not explicitly a scale measurement and is not substituted.

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

0 of 3 differ

Hi-Res Audio

Not available

Not available

Communication certifications

Not available

Not available

FCC ID

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.

Not available

Other certifications

Not available

Not available

In the box

2 of 3 differ

In the box

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

Sony ULT WEAR headphones, Carrying case, USB-A to USB-C cable, Headphone cable, Documents6Owner's manualhelpguide.sony.net/mdr/2981/v1/en/print.pdfRead 5 October 2026Page 9 exact included-item list. No AC adapter or airline adapter is listed.

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

AMarshall 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.

BSony ULT WEAR

Type	Length (m)	Count
USB-A to USB-C charging cable	0.2	1
3.5 mm stereo headphone cable	1.2	1

Source6Owner's manualhelpguide.sony.net/mdr/2981/v1/en/print.pdfRead 5 October 2026Printed page 9 supplies one USB-A to USB-C charging cable and one headphone cable. The complete individual lengths are published by the separate Japanese maker accessory list.14Maker product pagesony.jp/headphone/products/ULT_WEARRead 8 October 2026The exact maker supplied-accessory list states a headphone cable approximately 1.2 m long and a USB-A to USB-C cable approximately 20 cm long. The original guide separately confirms one of each. This preserves the supplied charging-cable length without adopting optional aftermarket cables.

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

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

Hard13Reviewexpertreviews.co.uk/technology/headphones-audio/sony-ult-wear-reviewRead 8 October 2026The exact ULT WEAR What do you get for the money section explicitly lists a supplied hard-shell carrying case. Original Sony Help Guide printed page 9 confirms that the case is included. Only this package fact is used from the review. Optional gSport bundles and other Sony models are excluded.

Links

Not compared

Product page

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

www.sony.jp/headphone/products/ULT_WEAR1Maker product pagesony.jp/headphone/products/ULT_WEAR/spec.htmlRead 5 October 2026

Spec sheet

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

www.sony.jp/headphone/products/ULT_WEAR/spec.html1Maker product pagesony.jp/headphone/products/ULT_WEAR/spec.htmlRead 5 October 2026Exact Japanese specification table directly opened, decoded CP932. Closed dynamic 40 mm dome, neodymium magnet. No diaphragm material or physical drivers-per-side count is inferred.

Manual

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

helpguide.sony.net/mdr/2981/v1/en/print.pdf6Owner's manualhelpguide.sony.net/mdr/2981/v1/en/print.pdfRead 5 October 2026Full 144-page English Help Guide directly opened. Runtime table page 25 and continuation page 26 visually checked. Exact ULT WEAR, copyright 2024, reference 5-055-975-11(2).

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.

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.

Not available

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