Headsets and headphones / Compare

Bose QuietComfort Ultra Headphones vs Marshall Monitor III A.N.C.

A

Product A: Bose

QuietComfort Ultra Headphones

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B

Product B: Marshall

Monitor III A.N.C.

80 of 161 known

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Every value links to where we found it.

Only differences

ABose QuietComfort Ultra Headphones

BMarshall Monitor III A.N.C.

General

5 of 8 differ

Series

QuietComfort1Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 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.

440108, 880066-0100, 880066-0200, 880066-0300, 880066-1200, 880066-15001Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026Page product data lists SKU 880066-0100 BLACK, 880066-0200 WHITE SMOKE, 880066-0300 SANDSTONE, 880066-1200 LUNAR BLUE and 880066-1500 DEEP PLUM. Regulatory model 440108 is from the owner's guide2Maker product pagebose.de/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026Product data lists the same five SKUs as bose.co.uk: 880066-0100, 880066-0200, 880066-0300, 880066-1200 and 880066-15003Owner's manualassets.bosecreative.com/m/8f024ac3c0159c1/original/884885_OG_QCUH-HEADPHONEARN_en.pdfRead 6 October 2026Page 6: Model number 440108

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

GTIN / EAN

Not available

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

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

14 September 20234Press releasebose.com/pressroom/bose-announces-new-quietcomfort-ultra-headphones-and-earbudsRead 6 October 2026Press release dated September 14, 2023. It gives no price or sale date

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

Status

Available1Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026Black in stock with Add to Basket on 2026-10-06. Sandstone, Lunar Blue and Deep Plum out of stock. The bose.com US product URL redirects to the home page

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 Ultra Headphones (2nd Gen)8Reviewwhathifi.com/headphones/wireless-headphones/bose-qc-ultra-headphones-2nd-gen-vs-bose-qc-ultra-headphones-1st-gen-whats-the-differenceRead 6 October 2026The original QC Ultras are outclassed by their successors. The 2nd Gen launched at the same UK price as their predecessors

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

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.

GB, DE1Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026Sold on bose.co.uk (GB) on 2026-10-06. DE is from the bose.de source2Maker product pagebose.de/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026Bose Germany sells the product. Black and White Smoke in stock on 2026-10-06

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, White Smoke, Sandstone, Lunar Blue, Deep Plum1Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026Colour names as listed on the page: Black, White Smoke, Sandstone, Lunar Blue, Deep Plum. The Diamond 60th Edition is not listed2Maker product pagebose.de/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026Same colour to SKU pairs as bose.co.uk: Black, White Smoke, Sandstone, Lunar Blue, Deep Plum

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

Segment

Music1Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026Sold under Headphones. Music listening headphones, not a gaming headset

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-ear1Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026Technical Specifications: Headphone Fit, Around Ear Circumaural

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.

Closed9Measurementrtings.com/headphones/reviews/bose/quietcomfort-ultra-headphones-wirelessRead 6 October 2026Enclosure: Closed-Back

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

Headband1Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026Technical Specifications: Headband, On Head Adjustable

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 inward3Owner's manualassets.bosecreative.com/m/8f024ac3c0159c1/original/884885_OG_QCUH-HEADPHONEARN_en.pdfRead 6 October 2026Page 42 to 43: rotate both earcups inward so they lay flat, then fold the left earcup up 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.

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

Yes3Owner's manualassets.bosecreative.com/m/8f024ac3c0159c1/original/884885_OG_QCUH-HEADPHONEARN_en.pdfRead 6 October 2026Page 42: the earcups rotate for storage

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

8 of 20 differ

Driver type

Not available

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.

Not available

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.

Not available

Not available

Diaphragm material

Not available

Not available

Magnet

Not available

Not available

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

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.

Yes11Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 8 October 2026The exact original QuietComfort Ultra Headphones CustomTune FAQ states that a calibration tone plays at startup while the headphones are worn. The headset measures how the unique ear and ear-canal shape modifies the tone, then adjusts audio playback to that ear shape. This is a manufacturer-supported acoustic ear scan and device sound profile. It is separate from manual EQ, and does not claim a hearing-threshold test or a profile saved permanently across power cycles. The second-generation headphone is excluded.

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.

31Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026Adjust EQ settings by modifying the levels of bass, mid-range and treble. The owner's guide battery note also says 3-band EQ3Owner's manualassets.bosecreative.com/m/8f024ac3c0159c1/original/884885_OG_QCUH-HEADPHONEARN_en.pdfRead 6 October 2026Page 36 test note: 3-band EQ set to zero

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

EQ presets

Not available

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

Volume limit

Not available

Not available

Spatial audio

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.

Bose Immersive Audio1Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026Breakthrough Bose Immersive Audio. Still and Motion settings

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

Yes3Owner's manualassets.bosecreative.com/m/8f024ac3c0159c1/original/884885_OG_QCUH-HEADPHONEARN_en.pdfRead 6 October 2026Page 22: in the Still setting the virtual speakers stay where they are when you move your head4Press releasebose.com/pressroom/bose-announces-new-quietcomfort-ultra-headphones-and-earbudsRead 6 October 2026Immersive Audio is enabled by an onboard IMU

Not available

Noise cancelling

4 of 10 differ

Active noise cancelling

Yes1Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 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.

Hybrid1Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026FAQ: microphones both inside and outside the earcups. Features: 8 microphones for advanced feedback and adaptive feed-forward noise reduction

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.

Yes1Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026Features: adaptive feed-forward noise reduction. Aware Mode with ActiveSense applies noise cancellation automatically during loud sounds

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

Yes1Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026Aware Mode feels as if you are not wearing headphones

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

Adjustable transparency

Not available

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

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

Not available

Not available

Wind noise reduction

Yes1Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026FAQ What is Wind Block: mutes the outside noise-cancelling microphones in wind3Owner's manualassets.bosecreative.com/m/8f024ac3c0159c1/original/884885_OG_QCUH-HEADPHONEARN_en.pdfRead 6 October 2026Page 25: custom modes offer noise cancellation or wind block

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

Measured

7 of 21 differ

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

Warm sound with slightly emphasized bass. Low harmonic distortion. Left and right drivers are reasonably well matched except in the treble.9Measurementrtings.com/headphones/reviews/bose/quietcomfort-ultra-headphones-wirelessRead 6 October 2026Public verdict on audio reproduction accuracy and sound signature Warm. Detailed test values are members-only and were not used

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

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

2dB9Measurementrtings.com/headphones/reviews/bose/quietcomfort-ultra-headphones-wirelessRead 6 October 2026Test Bench 2.3. Bass Amount: Slightly Emphasized (2 dB)

Not available

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

-1dB9Measurementrtings.com/headphones/reviews/bose/quietcomfort-ultra-headphones-wirelessRead 6 October 2026Test Bench 2.3. Treble Amount: Balanced (-1 dB)

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

Satisfactory. Captures the voice without notable peaks or dips. Only an okay job of separating the voice from surrounding noise.9Measurementrtings.com/headphones/reviews/bose/quietcomfort-ultra-headphones-wirelessRead 6 October 2026Public verdict on the microphone

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 Ultra Headphones

Connection	Hours (h)
Bluetooth	27.62

Source10Reviewsoundguys.com/bose-quietcomfort-ultra-headphones-review-103901Read 6 October 2026Standardized test protocol: 27 hours and 37 minutes of continuous playback. ANC state and codec are not stated on the page

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

27.62h=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

4 of 16 differ

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

Built-in1Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026Technical Specifications: Microphones, Built-in Microphone

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.

43Owner's manualassets.bosecreative.com/m/8f024ac3c0159c1/original/884885_OG_QCUH-HEADPHONEARN_en.pdfRead 6 October 2026Page 17: four microphones for phone calls, two on each earcup

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.

DSP1Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026FAQ phone calls: the adaptive microphone system isolates your voice from competing background noises and wind. Noise Control Type also lists Echo Reduction

Not available

Flip to mute

Not available

Not available

Mute button

Not available

Not available

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

Not available

Not available

Sidetone

Yes1Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026FAQ phone calls: self-voice allows you to hear yourself naturally3Owner's manualassets.bosecreative.com/m/8f024ac3c0159c1/original/884885_OG_QCUH-HEADPHONEARN_en.pdfRead 6 October 2026

Not available

Adjustable sidetone

Yes3Owner's manualassets.bosecreative.com/m/8f024ac3c0159c1/original/884885_OG_QCUH-HEADPHONEARN_en.pdfRead 6 October 2026Page 21: self voice is activated on calls. Adjust self voice in the 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.

Bluetooth, Analog3Owner's manualassets.bosecreative.com/m/8f024ac3c0159c1/original/884885_OG_QCUH-HEADPHONEARN_en.pdfRead 6 October 2026Page 33: 2.5 mm to 3.5 mm audio cable. Page 34: the headphones do not support 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 source plugsiAnalog plug(s) supplied for the source device, including adapters. The headset-side jack is listed separately.

3.5 mm TRS10Reviewsoundguys.com/bose-quietcomfort-ultra-headphones-review-103901Read 6 October 20262.5 to 3.5mm TRS cable

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 mm3Owner's manualassets.bosecreative.com/m/8f024ac3c0159c1/original/884885_OG_QCUH-HEADPHONEARN_en.pdfRead 6 October 2026Page 33: connect the cable to the 2.5 mm port on the left earcup

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

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

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-C3Owner's manualassets.bosecreative.com/m/8f024ac3c0159c1/original/884885_OG_QCUH-HEADPHONEARN_en.pdfRead 6 October 2026Page 34: USB-C port on the left earcup

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.

No1Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026FAQ: Do QuietComfort Ultra Headphones support USB audio? No.3Owner's manualassets.bosecreative.com/m/8f024ac3c0159c1/original/884885_OG_QCUH-HEADPHONEARN_en.pdfRead 6 October 2026

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.

No1Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026FAQ: the headphones must be powered on during use, including when using the auxiliary audio cable3Owner's manualassets.bosecreative.com/m/8f024ac3c0159c1/original/884885_OG_QCUH-HEADPHONEARN_en.pdfRead 6 October 2026Page 33: the headphones must be powered on to use the audio cable

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.

None3Owner's manualassets.bosecreative.com/m/8f024ac3c0159c1/original/884885_OG_QCUH-HEADPHONEARN_en.pdfRead 6 October 2026Bluetooth only. No receiver in the box

Not available

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

Not available

Not available

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

9m1Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026Technical Specifications: Bluetooth Range 9 m. FAQ: up to 9 metres (30 ft)

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

Bluetooth

5.31Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026Technical Specifications: Bluetooth Version 5.34Press releasebose.com/pressroom/bose-announces-new-quietcomfort-ultra-headphones-and-earbudsRead 6 October 2026Bluetooth 5.3 compatible

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

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

SBC, AAC, aptX Adaptive3Owner's manualassets.bosecreative.com/m/8f024ac3c0159c1/original/884885_OG_QCUH-HEADPHONEARN_en.pdfRead 6 October 2026Page 32: aptX Adaptive with Snapdragon Sound-certified devices. SBC and AAC from What Hi-Fi4Press releasebose.com/pressroom/bose-announces-new-quietcomfort-ultra-headphones-and-earbudsRead 6 October 2026Snapdragon Sound with aptX Adaptive, including lossless and low latency capabilities6Reviewwhathifi.com/reviews/bose-quietcomfort-ultra-headphones-reviewRead 6 October 2026Tech specs: Bluetooth SBC, AAC, aptX Adaptive

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.

Yes1Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026FAQ: connects to two source devices at the same time. Added by a software update in July 20243Owner's manualassets.bosecreative.com/m/8f024ac3c0159c1/original/884885_OG_QCUH-HEADPHONEARN_en.pdfRead 6 October 2026

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.

21Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026FAQ: two source devices at the same time3Owner's manualassets.bosecreative.com/m/8f024ac3c0159c1/original/884885_OG_QCUH-HEADPHONEARN_en.pdfRead 6 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

63Owner's manualassets.bosecreative.com/m/8f024ac3c0159c1/original/884885_OG_QCUH-HEADPHONEARN_en.pdfRead 6 October 2026Page 27: up to six devices in the device list, two actively connected

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

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

Not available

Not available

Fast pairing

Google Fast Pair3Owner's manualassets.bosecreative.com/m/8f024ac3c0159c1/original/884885_OG_QCUH-HEADPHONEARN_en.pdfRead 6 October 2026Page 31: Connect using Fast Pair, Android 6.0 or higher4Press releasebose.com/pressroom/bose-announces-new-quietcomfort-ultra-headphones-and-earbudsRead 6 October 2026

Not available

Base station

Not available

Not available

Latency

None of 2 known

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

Not available

Not available

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

Not available

Not available

Compatibility

2 of 3 differ

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

Not available

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 Ultra Headphones

Not available

BMarshall Monitor III A.N.C.

Platform	Connection
Android	Bluetooth
iOS	Bluetooth

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

Official licence

Not available

Not available

Battery and charging

9 of 13 differ

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

Not available

Not available

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

No3Owner's manualassets.bosecreative.com/m/8f024ac3c0159c1/original/884885_OG_QCUH-HEADPHONEARN_en.pdfRead 6 October 2026Safety information: do not attempt to remove the rechargeable lithium-ion battery. Contact Bose

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 Ultra Headphones

Connection	ANC	Spatial audio	Hours (h)
Bluetooth	Yes	No	24
Bluetooth	Yes	Yes	18

Source12Owner's manualassets.bosecreative.com/m/8f024ac3c0159c1/original/884885_OG_QCUH-HEADPHONEARN_en.pdfRead 8 October 2026The exact manufacturer guide on printed page 36 gives up to 24 hours with Bose Immersive Audio Off and up to 18 hours with it On after a full charge. Both music rows use Quiet Mode with full active noise cancellation, Bluetooth A2DP streaming at 75 dB SPL playback loudness, and all three equalizer bands at zero. Manufacturer testing used production-representative units in June 2023 with a variety of music tracks. The Bluetooth codec and Immersive Still/Motion setting are unspecified, so neither is inferred. These are manufacturer claims, not independent reviewer measurements.

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-C1Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 20263Owner's manualassets.bosecreative.com/m/8f024ac3c0159c1/original/884885_OG_QCUH-HEADPHONEARN_en.pdfRead 6 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.

180min1Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026Technical Specifications: Battery Charge Time 3 hours. A page FAQ says up to 2 hours. The owner's guide says up to 3 hours and wins3Owner's manualassets.bosecreative.com/m/8f024ac3c0159c1/original/884885_OG_QCUH-HEADPHONEARN_en.pdfRead 6 October 2026Page 36: allow up to 3 hours to fully charge

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

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

15min3Owner's manualassets.bosecreative.com/m/8f024ac3c0159c1/original/884885_OG_QCUH-HEADPHONEARN_en.pdfRead 6 October 2026Page 36: a 15-minute charge

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

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

2.5h3Owner's manualassets.bosecreative.com/m/8f024ac3c0159c1/original/884885_OG_QCUH-HEADPHONEARN_en.pdfRead 6 October 2026Page 36: up to 2.5 hours with Immersive Audio off, 2 hours with it on. A bose.co.uk FAQ says 3 hours. The owner's guide wins

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

No3Owner's manualassets.bosecreative.com/m/8f024ac3c0159c1/original/884885_OG_QCUH-HEADPHONEARN_en.pdfRead 6 October 2026Page 34: the headphones power off when connected to power and will not charge while powered on. They can run from USB power without charging

Not available

Charging dock or stand

Not available

Not available

Controls

3 of 6 differ

Controls

Buttons, Touch1Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026FAQ controls: Bluetooth/power button, multi-function button and capacitive volume strip on the right earcup

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

Touch1Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026Swiping along the volume strip changes volume

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.

Yes1Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026Press and hold on the volume strip activates a user-configurable shortcut3Owner's manualassets.bosecreative.com/m/8f024ac3c0159c1/original/884885_OG_QCUH-HEADPHONEARN_en.pdfRead 6 October 2026Page 19: shortcut on touch and hold of the volume strip, set in the Bose app

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

Wear detection

Yes1Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026FAQ controls: on-head/off-head detection3Owner's manualassets.bosecreative.com/m/8f024ac3c0159c1/original/884885_OG_QCUH-HEADPHONEARN_en.pdfRead 6 October 2026Page 20: on-head detection, auto play/pause and auto answer

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

Not available

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

5 of 11 differ

Headband type

Not available

Not available

Headband material

Pleather1Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026Product Comparison table, Materials: Pleather headband, plastic yolk6Reviewwhathifi.com/reviews/bose-quietcomfort-ultra-headphones-reviewRead 6 October 2026Metal arms and yokes combined with the pleather on the headband and earcups

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

Frame material

Not available

Not available

Ear cup material

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 leather1Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026Technical Specifications: Ear Cushion Material, Protein Leather

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

Replaceable ear pads

Yes1Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026Technical Specifications: Cushions, Removable Cushion. The page links a QSG for the QCUH cushion kit

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.

Clip3Owner's manualassets.bosecreative.com/m/8f024ac3c0159c1/original/884885_OG_QCUH-HEADPHONEARN_en.pdfRead 6 October 2026Pages 45 to 46, serial number location: pull the cushion away until all six tabs release, then align the six tabs on the cushion mounting flange with the six slots on the earcup and press until they snap in

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 cushions3Owner's manualassets.bosecreative.com/m/8f024ac3c0159c1/original/884885_OG_QCUH-HEADPHONEARN_en.pdfRead 6 October 2026Pages 45 to 46: the cushion is pulled off and snapped back by the user. Page 44: replacement parts through Bose customer service. The bose.co.uk page sells the QuietComfort Ultra Headphones Ear Cushion Kit

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 app3Owner's manualassets.bosecreative.com/m/8f024ac3c0159c1/original/884885_OG_QCUH-HEADPHONEARN_en.pdfRead 6 October 2026Page 12: download the Bose app. The bose.co.uk spec table still names the Bose Music App

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

App platforms

Android, iOS1Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026Support: download the app on Google Play and the Apple Store

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

Yes3Owner's manualassets.bosecreative.com/m/8f024ac3c0159c1/original/884885_OG_QCUH-HEADPHONEARN_en.pdfRead 6 October 2026Page 44: updates through the Bose app or btu.Bose.com

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

Dimensions and weight

1 of 2 differ

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

254g(9 oz)1Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026Technical Specifications: Headphone 0.560 lb, converted. Bose Germany states 0.25 kg. What Hi-Fi states 250 g

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

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

Not available

Not available

Certifications

0 of 3 differ

Hi-Res Audio

Not available

Not available

Communication certifications

Not available

Not available

FCC ID

A944401083Owner's manualassets.bosecreative.com/m/8f024ac3c0159c1/original/884885_OG_QCUH-HEADPHONEARN_en.pdfRead 6 October 2026Regulatory page: FCC ID A94440108, IC 3232A-440108

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 Ultra Headphones, Carry case, 3.5 mm to 2.5 mm audio cable, USB-C (A to C) cable (50.8 cm) (20"), Safety sheet1Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026What's in the box, verbatim

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 Ultra Headphones

Type	Length (m)	Count
USB-A to USB-C	0.508	1
3.5 mm to 2.5 mm audio cable	Not available	1

Source1Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026USB-C (A to C) cable 50.8 cm (20 in). Audio cable length not published

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.

Hard7Reviewwhathifi.com/advice/bose-quietcomfort-headphones-vs-quietcomfort-ultra-headphones-what-are-the-differencesRead 6 October 2026Both models come with a useful hard-shell carrying case

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.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.html1Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026

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

Spec sheet

Not available

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

Manual

assets.bosecreative.com/m/8f024ac3c0159c1/original/884885_OG_QCUH-HEADPHONEARN_en.pdf3Owner's manualassets.bosecreative.com/m/8f024ac3c0159c1/original/884885_OG_QCUH-HEADPHONEARN_en.pdfRead 6 October 2026Owner's guide 884885 for QuietComfort Ultra Headphones

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

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

Not available

Not available

Warranty

1 of 1 differ

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

2years1Maker product pagebose.co.uk/p/headphones/bose-quietcomfort-ultra-headphones/QCUH-HEADPHONEARN.htmlRead 6 October 2026GB: Why buy direct from Bose, 2-year warranty

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.