Headsets and headphones / Compare

Bose QuietComfort Headphones (2023) vs Marshall Monitor III A.N.C.

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Product A: Bose

QuietComfort Headphones (2023)

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B

Product B: Marshall

Monitor III A.N.C.

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Only differences

ABose QuietComfort Headphones (2023)

BMarshall Monitor III A.N.C.

General

6 of 8 differ

Series

QuietComfort2Maker product pagebose.com/p/noise-cancelling-headphones-quietcomfort/quietcomfort-acoustic-noise-cancelling-headphones/QC-HEADPHONEARN-BLK-WW.htmlRead 7 October 2026

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.

437310, 884367-01001Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026Regulatory model 437310 is shared with some related QuietComfort revisions. Marketed 2023 model identified by exact current product page and 884367 commercial SKU in review, not model number alone.10Retailer pagebhphotovideo.com/c/product/1785014-REG/bose_884367_0100_quietcomfort_wireless_over_ear_active.htmlRead 7 October 2026Exact MFR 884367-0100 Black commercial SKU added alongside preserved regulatory 437310. These are different identifier systems, not two claimed chipset revisions.

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

01781784896110Retailer pagebhphotovideo.com/c/product/1785014-REG/bose_884367_0100_quietcomfort_wireless_over_ear_active.htmlRead 7 October 2026Exact Black US commercial SKU 884367-0100 UPC 017817848961. Base union of known identifiers. Black variant alone records this gtin, no other color assigned its code.

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.

14 September 20234Press releaseprnewswire.com/news-releases/bose-announces-new-quietcomfort-ultra-headphones-and-earbuds-with-bose-immersive-audio-for-the-most-realistic-sound-ever-301928295.htmlRead 5 October 2026Exact maker release September 14, 2023. Planned September 21 sale is separately corroborated by retrospective launch-history source.

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

Available2Maker product pagebose.com/p/noise-cancelling-headphones-quietcomfort/quietcomfort-acoustic-noise-cancelling-headphones/QC-HEADPHONEARN-BLK-WW.htmlRead 7 October 2026Exact original QC product offers Add to Cart, current 359 USD is not used as launch price.

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.

Bose QuietComfort Headphones (2nd Gen)16Press releasebose.com/pressroom/bose-updates-the-iconic-quietcomfort-headphonesRead 23 October 2026Bose's press release calls the QuietComfort Headphones (2nd Gen) the next generation and compares them with the first-generation model.

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.

$3494Press releaseprnewswire.com/news-releases/bose-announces-new-quietcomfort-ultra-headphones-and-earbuds-with-bose-immersive-audio-for-the-most-realistic-sound-ever-301928295.htmlRead 5 October 2026Bose-authored US launch release explicitly original QuietComfort 349 USD, planned September 21. Ultra Headphones 429 USD and Ultra Earbuds 299 USD are separate products and excluded. US MSRP before local sales tax. No EUR figure with proven VAT scope.

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.

Not available

€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.

US4Press releaseprnewswire.com/news-releases/bose-announces-new-quietcomfort-ultra-headphones-and-earbuds-with-bose-immersive-audio-for-the-most-realistic-sound-ever-301928295.htmlRead 5 October 2026

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

Black, Moonlight Grey, White Smoke, Cypress Green, Twilight Blue, Ice Blue, Sandstone, Petal Pink, Blue Dusk, Chilled Lilac, Moonstone Blue2Maker product pagebose.com/p/noise-cancelling-headphones-quietcomfort/quietcomfort-acoustic-noise-cancelling-headphones/QC-HEADPHONEARN-BLK-WW.htmlRead 7 October 2026Exact initial product color swatches in public maker HTML use dwvar_QC-HEADPHONEARN_color. Ultra, 2nd Gen and related product swatches excluded. Historical Chilled Lilac color not in current selector is separately researched.11Maker product pagesupport.bose.com/s/article/quietcomfort-headphones-specificationsRead 7 October 2026Exact support Product Specifications entry explicitly Sold from 2023 and Available Colors list includes Blue Dusk, Chilled Lilac and Moonstone Blue in addition to existing eight colors. Public search-index table read. Live HTTP 200 page is a JS shell and web direct fetch failed, noted externally. No second-generation colors added.

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

Music1Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026

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

0 of 7 differ

Form factor

Over-ear1Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026

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.

Closed2Maker product pagebose.com/p/noise-cancelling-headphones-quietcomfort/quietcomfort-acoustic-noise-cancelling-headphones/QC-HEADPHONEARN-BLK-WW.htmlRead 7 October 2026Maker FAQ describes passive seal and TriPort acoustic structure with closed earcups. Vents are not open-back classification.

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

Headband1Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026

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.

Flat and inward1Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026Page 35 expressly rotate both cups flat and fold left cup toward 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.

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

Yes1Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026

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

7 of 20 differ

Driver type

Dynamic7Reviewtomsguide.com/audio/headphones/dont-get-the-new-bose-quietcomfort-2nd-gen-gen-1-is-currently-just-usd169-for-prime-dayRead 7 October 2026Comparison explicitly says both 2023 first generation and 2026 second generation use the same 40 mm dynamic drivers. Exact original model scope, not Ultra. B&H exact 884367-0100 Driver Type Dynamic corroborates.

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.

40mm7Reviewtomsguide.com/audio/headphones/dont-get-the-new-bose-quietcomfort-2nd-gen-gen-1-is-currently-just-usd169-for-prime-dayRead 7 October 2026Comparison explicitly says both generations use same 40 mm drivers. Exact original TechRadar review specification table independently states 40 mm, contrasted with 35 mm Ultra. Not borrowed merely because older headphones look similar.12Reviewtechradar.com/audio/wireless-headphones/bose-quietcomfort-headphones-reviewRead 7 October 2026Exact original 2023 QuietComfort review specification table explicitly 40 mm drivers, independently read. Later Ultra and 2nd Gen not substituted.

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.

115Retailer pagebhphotovideo.com/c/product/1785014-REG/bose_884367_0100_quietcomfort_wireless_over_ear_active.htmlRead 8 October 2026The exact Black 884367-0100 Number of Drivers row explicitly states one per earpiece. This is a physical transducer count, not a stereo-channel inference. Other retailer charging and dimensional rows disagree with the maker and are not used.

Not available

Diaphragm material

Not available

Not available

Magnet

Not available

Not available

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

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.

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.

32Maker product pagebose.com/p/noise-cancelling-headphones-quietcomfort/quietcomfort-acoustic-noise-cancelling-headphones/QC-HEADPHONEARN-BLK-WW.htmlRead 7 October 2026Maker FAQ and customization section explicitly bass, midrange, treble, three controls. Review independently calls three-band slider.

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

Bass Boost, Treble Boost, Treble Reduce3Reviewsoundguys.com/bose-quietcomfort-headphones-review-99695Read 7 October 2026Exact original review EQ section has Bass Boost EQ and Treble Boost EQ subheadings with tested curves. Only explicitly named presets listed. Custom EQ is user adjustment, not a fixed preset. Later-generation preset lists excluded.12Reviewtechradar.com/audio/wireless-headphones/bose-quietcomfort-headphones-reviewRead 7 October 2026Exact original review explicitly names selectable presets like Bass Boost or Treble Reduce. Treble Reduce retained as the reviewer-published name, not an independently inspected app-label string. SoundGuys independently names Bass Boost and Treble Boost. other unnamed presets omitted.

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

4 of 10 differ

Active noise cancelling

Yes1Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026

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.

Hybrid2Maker product pagebose.com/p/noise-cancelling-headphones-quietcomfort/quietcomfort-acoustic-noise-cancelling-headphones/QC-HEADPHONEARN-BLK-WW.htmlRead 7 October 2026Maker FAQ explicitly microphones inside and outside earcups, hybrid feedback/feedforward arrangement. No adaptive-ANC claim inferred from adaptive call microphone system.

Not available

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

Not available

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

Yes1Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026

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

Adjustable transparency

Yes1Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026Pages 20-21 two fixed Quiet/Aware and up to two Custom noise-control modes. Aware is full transparency, Custom adjusts noise control. No 11-level count inferred from number of modes.

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

Yes1Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026Page 20 Custom mode supports Wind Block. Current page FAQ duplicates conflicting later model text, so only the exact manual mode is used.

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

5 of 21 differ

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

Lab measurements show a strong sub-bass emphasis and uneven upper-frequency response against the SoundGuys preference curve. Broad three-band app adjustments do not fully correct the profile.3Reviewsoundguys.com/bose-quietcomfort-headphones-review-99695Read 7 October 2026Same purchased review sample, stock firmware, app 8.0.5. No numeric graph extraction, score-to-dB conversion or band-average inference.

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.

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

Recorded speech tests found background-noise rejection limited. Wind handling was more effective in the tested sample. Samples cover quiet, office, wind, street and reverberant environments.3Reviewsoundguys.com/bose-quietcomfort-headphones-review-99695Read 7 October 2026Same sample and firmware conditions. It does not prove a numerical microphone capsule count.

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.

ABose QuietComfort Headphones (2023)

Connection	Hours (h)
Bluetooth	27.23

Source3Reviewsoundguys.com/bose-quietcomfort-headphones-review-99695Read 7 October 2026Purchased sample ran 27 h 14 min under SoundGuys standardized continuous music test. Firmware stock version number unknown, app 8.0.5. ANC state/codec not explicitly named for this run and omitted. Linked methodology states 75 dB SPL peak playback. 27.23 h versus claim 24 h is documented actual measurement, not an estimate.6Measurementsoundguys.com/how-we-testRead 5 October 2026Battery methodology explicitly continuous playback peaking 75 dB SPL recorded to empty. It does not state a universal ANC setting, so the QC row retains unknown ANC and codec rather than inferring them.

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

27.23h=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

3 of 16 differ

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

Built-in1Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026Page 30 explicitly distinguishes earcup voice microphones from the inline microphone supplied in the audio cable. Main field represents built-in voice system. Physical capsule count not stated and omitted.

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.

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

Not available

Flip to mute

Not available

Not available

Mute button

Yes1Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026Page 16 double-press left Action button mutes/unmutes active call. This is a context-sensitive control, not a separate physical mute button.

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

Yes1Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026

Not available

Adjustable sidetone

Yes1Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026Page 21 self voice activated during calls and adjustable in Bose app.

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

6 of 20 differ

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

Analog, Bluetooth1Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026

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 TRRS15Retailer pagebhphotovideo.com/c/product/1785014-REG/bose_884367_0100_quietcomfort_wireless_over_ear_active.htmlRead 8 October 2026The exact Black 884367-0100 Wired Audio Connector row states one 3.5 mm TRRS source connector. The original Bose guide independently confirms the supplied 2.5 mm to 3.5 mm microphone cable and its source-side 3.5 mm plug. No headset-side contact count is imported.

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.

2.5 mm1Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026

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.

Not available

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-C1Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026

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.

No3Reviewsoundguys.com/bose-quietcomfort-headphones-review-99695Read 7 October 2026Exact connectivity section explicitly no USB-C audio on original 2023 QC. The 2nd Gen model is different hardware and is excluded.

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.

Yes1Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026Page 30 audio and calls through supplied inline-mic cable when battery depleted or headphones off. Built-in earcup voice pickup and Bluetooth disabled when cable connected.

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.

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.

9m14Maker product pagebose.com/p/headphones/bose-quietcomfort-headphones/QC-HEADPHONEARN.htmlRead 8 October 2026The exact product range FAQ states up to 30 feet or nine meters from the Bluetooth source. Walls, doors, and electronic interference can reduce this distance. The maker metric figure is used without converting its rounded feet figure.

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

5.12Maker product pagebose.com/p/noise-cancelling-headphones-quietcomfort/quietcomfort-acoustic-noise-cancelling-headphones/QC-HEADPHONEARN-BLK-WW.htmlRead 7 October 2026

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, AAC3Reviewsoundguys.com/bose-quietcomfort-headphones-review-99695Read 7 October 2026

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.

Yes1Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026Page 25 up to two active devices, one audio source playing at a time. Pairing-list memory size not stated.

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.

21Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026

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

81Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026Printed page 23 explicitly says store up to eight devices in headphone device list. Active simultaneous count remains two.

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

Not available

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

1 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, iOS2Maker product pagebose.com/p/noise-cancelling-headphones-quietcomfort/quietcomfort-acoustic-noise-cancelling-headphones/QC-HEADPHONEARN-BLK-WW.htmlRead 7 October 2026Exact maker FAQ says audio and calls on any smartphone and names native Siri plus Zoom/FaceTime. Exact manual setup uses Google Play/Apple App Store on Android/iOS. Only these documented mobile platforms listed, no console or generic desktop assumption.13Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026Original manual Bose app setup page 11 uses App Store/Google Play and Bluetooth menu pairing to mobile device. Combined with maker explicit any-smartphone calls/audio claim, Android/iOS paths documented. No desktop/console inferred.

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.

ABose QuietComfort Headphones (2023)

Platform	Connection	Microphone works
Android	Bluetooth	Yes
iOS	Bluetooth	Yes

Source2Maker product pagebose.com/p/noise-cancelling-headphones-quietcomfort/quietcomfort-acoustic-noise-cancelling-headphones/QC-HEADPHONEARN-BLK-WW.htmlRead 7 October 2026Bluetooth smartphone call path from exact FAQ. Built-in microphones used. Bose app platform setup corroborates Android/iOS. Analog path not assigned to platforms because plug-type/source-mic compatibility evidence conflicts.13Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026Original Bluetooth menu/setup path and maker smartphone call FAQ establish Android/iOS Bluetooth playback and speech. Built-in microphones, not analog in-line route.

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

8 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.

No1Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026Printed page 4 explicitly says do not attempt battery removal and only a qualified professional should remove it. This rules out normal user battery swapping, not repairability.

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.

ABose QuietComfort Headphones (2023)

Connection	ANC	Hours (h)
Bluetooth	Yes	24

Source2Maker product pagebose.com/p/noise-cancelling-headphones-quietcomfort/quietcomfort-acoustic-noise-cancelling-headphones/QC-HEADPHONEARN-BLK-WW.htmlRead 7 October 2026Exact FAQ explicitly 24 h audio playback with noise cancellation turned on. Codec, volume, device and lighting unspecified.

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)

24h=CalculatedFrom Claimed battery life

100h=CalculatedFrom Claimed battery life

Battery life with ANC (claimed)

24h=CalculatedFrom Claimed battery life

70h=CalculatedFrom Claimed battery life

Battery life without ANC (claimed)

Not available

100h=CalculatedFrom Claimed battery life

Charging port

USB-C1Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026

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.

150min1Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026Page 27 up to 2.5 hours to fully charge, 150 minutes.

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.

15min14Maker product pagebose.com/p/headphones/bose-quietcomfort-headphones/QC-HEADPHONEARN.htmlRead 8 October 2026The current first-generation QuietComfort Headphones charging FAQ states a 15-minute fast charge. The product is identified as the successor to QuietComfort 45, not QuietComfort Headphones 2nd Gen.

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.

4h14Maker product pagebose.com/p/headphones/bose-quietcomfort-headphones/QC-HEADPHONEARN.htmlRead 8 October 2026The same FAQ states up to four hours of playback from a 15-minute charge. Codec, volume, and ANC state are not specified. The page also contains conflicting full-charge estimates of two and 2.5 hours. The existing 2.5-hour manual value is retained.

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

No1Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026Page 27 explicitly do not play while charging and unavailable in app. USB-C is charging only, not playback.

Not available

Charging dock or stand

Not available

Not available

Controls

3 of 6 differ

Controls

Buttons1Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026

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

Buttons1Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026

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.

Yes1Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026Page 19 Action hold shortcut can be assigned to Spotify or battery-level announcement. No Immersive Audio shortcut borrowed from Ultra or 2nd Gen.

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

No8Reviewtomsguide.com/reviews/bose-quietcomfort-headphonesRead 7 October 2026Original 2023 review explicitly says touch controls, wear detection and Find My Headphones key features are missing. Current 2026 comparison separately confirms both generations lack 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.

Voice assistant

Siri2Maker product pagebose.com/p/noise-cancelling-headphones-quietcomfort/quietcomfort-acoustic-noise-cancelling-headphones/QC-HEADPHONEARN-BLK-WW.htmlRead 7 October 2026Exact FAQ names phone native assistant Siri. Generic mobile voice control in manual does not establish built-in Alexa or Google Assistant service.

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

7 of 11 differ

Headband type

Padded10Retailer pagebhphotovideo.com/c/product/1785014-REG/bose_884367_0100_quietcomfort_wireless_over_ear_active.htmlRead 7 October 2026Premium Materials section explicitly underside of band uses soft protein-leather-covered foam. Original TechRadar review independently says headband well padded.12Reviewtechradar.com/audio/wireless-headphones/bose-quietcomfort-headphones-reviewRead 7 October 2026Exact original review design calls headband well-padded. Corroborates original Black retailer foam underside.

Not available

Headband material

Protein leather-covered foam with steel reinforcement10Retailer pagebhphotovideo.com/c/product/1785014-REG/bose_884367_0100_quietcomfort_wireless_over_ear_active.htmlRead 7 October 2026Premium Materials section explicitly steel in headband and soft protein-leather-covered foam underside. Maker exact first-generation comparison independently confirms steel reinforcement.

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

Steel-reinforced headband9Maker product pagebose.co.uk/stories/bose-quiet-comfort-headphones-second-gen-vs-first-genRead 7 October 2026Exact maker first-generation comparison explicitly describes classic design with steel-reinforced headband. Value scoped to structural headband, not a claim of all-metal earcups.

Not available

Ear cup material

Not available

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

Protein leather2Maker product pagebose.com/p/noise-cancelling-headphones-quietcomfort/quietcomfort-acoustic-noise-cancelling-headphones/QC-HEADPHONEARN-BLK-WW.htmlRead 7 October 2026

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

Yes1Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026

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.

Clip1Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026Page 37 cushion removal releases tabs around inside rim, clip attachment.

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

Ear cushions1Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026

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

1 of 3 differ

Companion app

Bose app1Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026

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

App platforms

Android, iOS1Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026Page 11 Apple App Store and Google Play listings.

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

Yes1Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026Manual update/troubleshooting section directs current Bose app 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.

Dimensions and weight

2 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.

235.9g(8.3 oz)2Maker product pagebose.com/p/noise-cancelling-headphones-quietcomfort/quietcomfort-acoustic-noise-cancelling-headphones/QC-HEADPHONEARN-BLK-WW.htmlRead 7 October 2026Exact original QuietComfort Headphone specification publishes 0.520 lb. Converted using 453.59237 g/lb and rounded to 0.1 g = 235.9 g. Source does not qualify cable inclusion or configuration. Claimed mass, not independent scale result. SoundGuys 240 g table is a secondary spec and does not override maker.

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.

Width157Height195.1Depth80mm(6.2 × 7.7 × 3.1 in)2Maker product pagebose.com/p/noise-cancelling-headphones-quietcomfort/quietcomfort-acoustic-noise-cancelling-headphones/QC-HEADPHONEARN-BLK-WW.htmlRead 7 October 2026Exact current maker headphone dimensions 7.68 in H, 6.18 in W, 3.15 in D, converted to mm and rounded to 0.1 mm. Headband extension and fold setting are unspecified. Review 184 x 152 x 76 mm unfolded differs, so the maker is preferred.

Not available

Certifications

0 of 3 differ

Hi-Res Audio

Not available

Not available

Communication certifications

Not available

Not available

FCC ID

A944373101Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026Printed page 4 explicitly gives FCC ID A94437310 for the exact original QuietComfort manual.

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

Not available

Not available

In the box

2 of 3 differ

In the box

Bose QuietComfort Headphones, Carry case, USB-A to USB-C cable, 3.5 mm to 2.5 mm audio cable with microphone, Safety Sheet1Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026Page 10 illustrates the headphones, case and two cables. The current exact product page additionally names the Safety Sheet. No airline adapter or SC soft-case bundle is included.2Maker product pagebose.com/p/noise-cancelling-headphones-quietcomfort/quietcomfort-acoustic-noise-cancelling-headphones/QC-HEADPHONEARN-BLK-WW.htmlRead 7 October 2026Current exact original QuietComfort product What is in the box list explicitly includes the Safety Sheet alongside headphones, carry case and two cables. The current manual identifies the analog cable as including a microphone.

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.

ABose QuietComfort Headphones (2023)

Type	Length (m)	Count
USB-A to USB-C charging cable	0.3048	1
2.5 mm to 3.5 mm audio cable with inline microphone	Not available	1

Source2Maker product pagebose.com/p/noise-cancelling-headphones-quietcomfort/quietcomfort-acoustic-noise-cancelling-headphones/QC-HEADPHONEARN-BLK-WW.htmlRead 7 October 2026Maker box USB-A to C 12 in, exact conversion 0.3048 m. Analog cable length not given.

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.

Hard2Maker product pagebose.com/p/noise-cancelling-headphones-quietcomfort/quietcomfort-acoustic-noise-cancelling-headphones/QC-HEADPHONEARN-BLK-WW.htmlRead 7 October 2026Exact product specifications states Product Case Material Leather (Hard). This applies standard model, not QuietComfort SC soft-case package.

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.bose.com/p/noise-cancelling-headphones-quietcomfort/quietcomfort-acoustic-noise-cancelling-headphones/QC-HEADPHONEARN-BLK-WW.html2Maker product pagebose.com/p/noise-cancelling-headphones-quietcomfort/quietcomfort-acoustic-noise-cancelling-headphones/QC-HEADPHONEARN-BLK-WW.htmlRead 7 October 2026Current maker page of the original QuietComfort. The page carries generic Immersive Audio app text that does not fit the original QC manual. No Immersive Audio or CustomTune claims are stored. The page has conflicting quick charge claims: the FAQ says 15 min for 4 h and the original QC comparison says 15 min for 2.5 h. The FAQ pair is stored from the separate first-generation page. The published 0.520 lb is stored as the converted maker claim of 235.9 g. The secondary 240 g table does not override the maker. No shell or headband materials are assigned from the generic Metal/Plastic/Leather product-material list. The adaptive call microphone wording does not identify DSP versus AI processing, so microphone_noise_reduction is omitted.

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

Spec sheet

www.bose.com/p/noise-cancelling-headphones-quietcomfort/quietcomfort-acoustic-noise-cancelling-headphones/QC-HEADPHONEARN-BLK-WW.html2Maker product pagebose.com/p/noise-cancelling-headphones-quietcomfort/quietcomfort-acoustic-noise-cancelling-headphones/QC-HEADPHONEARN-BLK-WW.htmlRead 7 October 2026

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

Manual

assets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdf1Owner's manualassets.bosecreative.com/m/4579082941b4e207/original/885443_OG_QC-HEADPHONEARN_en.pdfRead 7 October 2026Current 46-page original QuietComfort owner guide AM885443-0010, 2026 revision. Cover says QuietComfort Headphones. Regulatory model 437310 is on page 6. Controls pages 12-21, battery 27, wired 30, storage 35 and cushion tabs 37 checked.

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

0 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.

1year2Maker product pagebose.com/p/noise-cancelling-headphones-quietcomfort/quietcomfort-acoustic-noise-cancelling-headphones/QC-HEADPHONEARN-BLK-WW.htmlRead 7 October 2026US product page Bose 1-Year Limited Warranty section explicitly states one year, included with all Bose products. This is the US scope, not a worldwide statutory-warranty claim.

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.