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Marshall Monitor III A.N.C. vs soundcore Q20i

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Product A: Marshall

Monitor III A.N.C.

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B

Product B: soundcore

Q20i

58 of 161 known

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Only differences

AMarshall Monitor III A.N.C.

Bsoundcore Q20i

General

5 of 8 differ

Series

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

Q1Maker product pageus.soundcore.com/products/q20-hybrid-active-noise-cancelling-headphonesRead 15 October 2026Listed in the maker headphone range as the Q20i. The Life Q20 is a separate older model.

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

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

A3004, A3004Z11, A3004Z21, A3004Z31, A3004Z52, A3004G11, A3004G21, A3004G31, A3004G521Maker product pageus.soundcore.com/products/q20-hybrid-active-noise-cancelling-headphonesRead 15 October 2026US store SKUs A3004Z11 Black, A3004Z21 White, A3004Z31 Blue and A3004Z52 Pink. The global and UK stores sell the same colours as A3004G11, A3004G21, A3004G31 and A3004G52 with the same EANs. A3004 is the model number in the maker manual and the EU declaration of conformity.

GTIN / EAN

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

194644127008, 194644187309, 194644135720, 1946442383601Maker product pageus.soundcore.com/products/q20-hybrid-active-noise-cancelling-headphonesRead 15 October 2026Barcodes of the four US store variants, which the UK store repeats for the G-code SKUs.

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

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

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Status

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

Available1Maker product pageus.soundcore.com/products/q20-hybrid-active-noise-cancelling-headphonesRead 15 October 2026The US store lists Blue and White as available and Pink and Black as sold out on 2026-10-15. The product is on sale at $69.99.

PredecessoriThe model this one directly replaced, in the same line, tier and size, as the maker or a trusted review names it.

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SuccessoriThe model that directly replaced this one, in the same line, tier and size. A revision such as a Slim or OLED model does not count when a next generation exists.

Not available

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

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Launch price (EU)iThe maker's euro launch price for the stated configuration, including VAT as published. Current store prices and later discounts do not qualify.

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

Not available

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

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

Not available

ColoursiThe maker's own colour names

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

Black, White, Blue, Pink1Maker product pageus.soundcore.com/products/q20-hybrid-active-noise-cancelling-headphonesRead 15 October 2026Colour options Blue, Pink, White and Black. The US store option name is spelled BIue, which is read as Blue.

Segment

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

Music1Maker product pageus.soundcore.com/products/q20-hybrid-active-noise-cancelling-headphonesRead 15 October 2026Sold as noise cancelling headphones for commuting, travel and work. The page has no gaming or studio positioning.

Design

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Form factor

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

Over-ear6Spec databaseifixit.com/Device/Anker_Soundcore_Q20iRead 15 October 2026Background: over-ear Bluetooth headphone.8Reviewrobbsutton.com/soundcore-by-anker-q20i-hybrid-active-reviewRead 15 October 2026Review describes an over-ear design with memory foam ear cups and an adjustable headband.

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

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

Closed5Spec databasesoundguys.com/product/anker-soundcore-q20i-hybridRead 15 October 2026Acoustic design: closed-back.

Wearing style

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

Headband5Spec databasesoundguys.com/product/anker-soundcore-q20i-hybridRead 15 October 2026Headband type: adjustable over-head.

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

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

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

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

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RGB lighting

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

Not available

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Drivers and sound

7 of 20 differ

Driver type

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

Dynamic1Maker product pageus.soundcore.com/products/q20-hybrid-active-noise-cancelling-headphonesRead 15 October 2026The page says oversized 40mm dynamic drivers with BassUp technology.

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

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

40mm1Maker product pageus.soundcore.com/products/q20-hybrid-active-noise-cancelling-headphonesRead 15 October 2026

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

Not available

15Spec databasesoundguys.com/product/anker-soundcore-q20i-hybridRead 15 October 2026Driver count: 1.

Diaphragm material

Not available

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Magnet

Not available

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

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

Not available

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

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

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

16Ω2Owner's manualeasylounge.com/cdn/shop/files/17ac7872e3ce323838aedd78694dbcb5901d6ab1_SOUNDCQ20I_01_notice.pdfRead 15 October 2026SPECS table: Impedance 16 ohm. The manual names no power state.

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

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

Not available

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

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

Not available

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Max input power

Not available

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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

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

Not available

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DAC

Not available

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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

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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

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

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

Not available

EQ presets

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

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Volume limit

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Spatial audio

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

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

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

Not available

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Head tracking

Not available

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Noise cancelling

5 of 10 differ

Active noise cancelling

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

Yes1Maker product pageus.soundcore.com/products/q20-hybrid-active-noise-cancelling-headphonesRead 15 October 2026Hybrid Active Noise Cancelling. The page claims it reduces up to 90 percent of noise such as planes and car engines. That is a percentage claim and is not stored as dB.

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

Not available

Hybrid1Maker product pageus.soundcore.com/products/q20-hybrid-active-noise-cancelling-headphonesRead 15 October 2026Hybrid Active Noise Cancelling with internal and external microphones.

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

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

41Maker product pageus.soundcore.com/products/q20-hybrid-active-noise-cancelling-headphonesRead 15 October 20262 internal and 2 external mics work in tandem to detect external noise. This counts the ANC microphones only. The page does not say which microphone picks up the voice on calls.

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

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

Not available

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

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

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ANC attenuation (claimed)

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Transparency mode

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

Yes1Maker product pageus.soundcore.com/products/q20-hybrid-active-noise-cancelling-headphonesRead 15 October 2026Transparency mode is one of the 3 modes ANC, Normal and Transparency.

Adjustable transparency

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

Not available

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

Not available

Not available

Wind noise reduction

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

No5Spec databasesoundguys.com/product/anker-soundcore-q20i-hybridRead 15 October 2026Wind noise reduction: no.

Measured

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

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

Not available

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

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Passive isolation (measured)iMeasured by a reviewer, not claimed by the maker

Not available

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

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

Not available

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

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

Not available

Not available

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

Not available

Not available

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

Not available

Not available

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

Not available

Not available

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

AMarshall Monitor III A.N.C.

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

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

Bsoundcore Q20i

Not available

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

110.32h=CalculatedFrom Measured battery life

Not available

Clamping forceiMeasured by a reviewer, not claimed by the maker

Not available

Not available

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

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

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Microphone

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

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

Built-in5Spec databasesoundguys.com/product/anker-soundcore-q20i-hybridRead 15 October 2026Microphone: yes, a built-in array. No boom is listed.6Spec databaseifixit.com/Device/Anker_Soundcore_Q20iRead 15 October 2026Built-in microphone on the ear cup.

Microphone element

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

Not available

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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

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

Not available

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

Not available

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

Not available

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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

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

Not available

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Flip to mute

Not available

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Mute button

Not available

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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

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Sidetone

Not available

Not available

Adjustable sidetone

Not available

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

Not available

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Connectivity

7 of 20 differ

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

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

Bluetooth, Analog2Owner's manualeasylounge.com/cdn/shop/files/17ac7872e3ce323838aedd78694dbcb5901d6ab1_SOUNDCQ20I_01_notice.pdfRead 15 October 2026Bluetooth pairing and wired listening with a 3.5mm AUX cable. Wired listening turns Bluetooth off.

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

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

3.5 mm TRS3Maker product pageankerjapan.com/blogs/faq/a3004-soundcore-q20iRead 15 October 2026The included AUX cable has no microphone, so it is a 3.5 mm stereo (TRS) plug. The page does not name the plug type.

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

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

3.5 mm2Owner's manualeasylounge.com/cdn/shop/files/17ac7872e3ce323838aedd78694dbcb5901d6ab1_SOUNDCQ20I_01_notice.pdfRead 15 October 2026Wired listening page: plug a 3.5mm AUX cable into the headphones. Wired listening turns Bluetooth off and disables ANC. The manual does not say whether the cable is detachable at the headset end, so the jack is recorded and not a fixed cable.

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

Not available

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

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

USB-C2Owner's manualeasylounge.com/cdn/shop/files/17ac7872e3ce323838aedd78694dbcb5901d6ab1_SOUNDCQ20I_01_notice.pdfRead 15 October 2026USB-C charging port. It is not used for audio.

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

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

Not available

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

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

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

Not available

None2Owner's manualeasylounge.com/cdn/shop/files/17ac7872e3ce323838aedd78694dbcb5901d6ab1_SOUNDCQ20I_01_notice.pdfRead 15 October 2026The manual describes Bluetooth only and names no dongle or receiver.

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

Not available

Not available

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

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

10m2Owner's manualeasylounge.com/cdn/shop/files/17ac7872e3ce323838aedd78694dbcb5901d6ab1_SOUNDCQ20I_01_notice.pdfRead 15 October 2026SPECS table: Bluetooth range 10 m / 32.8 ft. No conditions are given. The 2026 guide says 15 m.7Reviewouteraudio.com/soundcore-q20-vs-q20iRead 15 October 2026The page says a range of up to 10 meters.

Bluetooth

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

5.01Maker product pageus.soundcore.com/products/q20-hybrid-active-noise-cancelling-headphonesRead 15 October 2026Connect to two devices simultaneously with Bluetooth 5.0. A newer 2026 maker guide for the Q20i prints Bluetooth 5.3, see the doubts. The store page and the older manual both say 5.0.2Owner's manualeasylounge.com/cdn/shop/files/17ac7872e3ce323838aedd78694dbcb5901d6ab1_SOUNDCQ20I_01_notice.pdfRead 15 October 2026SPECS table: Bluetooth version 5.0.7Reviewouteraudio.com/soundcore-q20-vs-q20iRead 15 October 2026The page says Bluetooth 5.0.

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

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

Not available

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

Not available

Not available

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

Not available

Not available

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

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

Yes1Maker product pageus.soundcore.com/products/q20-hybrid-active-noise-cancelling-headphonesRead 15 October 2026Dual-Connections: connect to two devices simultaneously and switch between them.2Owner's manualeasylounge.com/cdn/shop/files/17ac7872e3ce323838aedd78694dbcb5901d6ab1_SOUNDCQ20I_01_notice.pdfRead 15 October 2026Dual connections: the headphones can connect with two devices at the same time.3Maker product pageankerjapan.com/blogs/faq/a3004-soundcore-q20iRead 15 October 2026Multipoint pairing with two devices. Only one plays at a time.

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

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

21Maker product pageus.soundcore.com/products/q20-hybrid-active-noise-cancelling-headphonesRead 15 October 2026Two devices at the same time.

Paired devices remembered

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

Not available

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

2 of 3 differ

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

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

Not available

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

AMarshall Monitor III A.N.C.

Platform	Connection
Android	Bluetooth
iOS	Bluetooth

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

Bsoundcore Q20i

Not available

Official licence

Not available

Not available

Battery and charging

10 of 13 differ

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

Not available

800mAh2Owner's manualeasylounge.com/cdn/shop/files/17ac7872e3ce323838aedd78694dbcb5901d6ab1_SOUNDCQ20I_01_notice.pdfRead 15 October 2026SPECS table: Battery capacity 800 mAh.

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

Not available

Not available

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

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

Not available

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

AMarshall Monitor III A.N.C.

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

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

Bsoundcore Q20i

Connection	ANC	Hours (h)
Bluetooth	No	60
Bluetooth	Yes	40

Source1Maker product pageus.soundcore.com/products/q20-hybrid-active-noise-cancelling-headphonesRead 15 October 202640 hours with ANC on and 60 hours in normal mode. The playback codec is not stated. The Anker Japan FAQ names the test conditions.2Owner's manualeasylounge.com/cdn/shop/files/17ac7872e3ce323838aedd78694dbcb5901d6ab1_SOUNDCQ20I_01_notice.pdfRead 15 October 2026SPECS table: Playtime with ANC off up to 60 hours, with ANC on up to 40 hours.3Maker product pageankerjapan.com/blogs/faq/a3004-soundcore-q20iRead 15 October 2026About 40 hours with ANC on and about 60 hours with ANC off over Bluetooth. Anker's tests used default settings, standard mode and 50 percent volume.

Battery life (claimed, max)

100h=CalculatedFrom Claimed battery life

60h=CalculatedFrom Claimed battery life

Battery life with ANC (claimed)

70h=CalculatedFrom Claimed battery life

40h=CalculatedFrom Claimed battery life

Battery life without ANC (claimed)

100h=CalculatedFrom Claimed battery life

60h=CalculatedFrom Claimed battery life

Charging port

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

USB-C2Owner's manualeasylounge.com/cdn/shop/files/17ac7872e3ce323838aedd78694dbcb5901d6ab1_SOUNDCQ20I_01_notice.pdfRead 15 October 2026Charging page: USB-C charging port and a certified USB-C charging cable.

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

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

90min2Owner's manualeasylounge.com/cdn/shop/files/17ac7872e3ce323838aedd78694dbcb5901d6ab1_SOUNDCQ20I_01_notice.pdfRead 15 October 2026SPECS table: Charging time 90 minutes. The Anker Japan FAQ also says about 90 minutes. The 2026 maker guide for the Q20i and Q11i says 2 hours, see the doubts.3Maker product pageankerjapan.com/blogs/faq/a3004-soundcore-q20iRead 15 October 2026Anker Japan FAQ, in Japanese: full charge takes about 90 minutes.

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

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

5min1Maker product pageus.soundcore.com/products/q20-hybrid-active-noise-cancelling-headphonesRead 15 October 2026Fast charge for 5 mins to get an extra 4 hours of playtime.2Owner's manualeasylounge.com/cdn/shop/files/17ac7872e3ce323838aedd78694dbcb5901d6ab1_SOUNDCQ20I_01_notice.pdfRead 15 October 2026Charging diagram: 5 min = 4 hr.

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

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

4h1Maker product pageus.soundcore.com/products/q20-hybrid-active-noise-cancelling-headphonesRead 15 October 2026Fast charge for 5 mins to get an extra 4 hours of playtime.2Owner's manualeasylounge.com/cdn/shop/files/17ac7872e3ce323838aedd78694dbcb5901d6ab1_SOUNDCQ20I_01_notice.pdfRead 15 October 2026Charging diagram: 5 min = 4 hr.

Use while charging

Not available

No2Owner's manualeasylounge.com/cdn/shop/files/17ac7872e3ce323838aedd78694dbcb5901d6ab1_SOUNDCQ20I_01_notice.pdfRead 15 October 2026Charging page: Do not turn on your headphones while charging.

Charging dock or stand

Not available

Not available

Controls

4 of 6 differ

Controls

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

Buttons2Owner's manualeasylounge.com/cdn/shop/files/17ac7872e3ce323838aedd78694dbcb5901d6ab1_SOUNDCQ20I_01_notice.pdfRead 15 October 2026Button controls table: multi-function button, volume buttons and an NC button. No touch controls are listed.

Volume control

Not available

Buttons2Owner's manualeasylounge.com/cdn/shop/files/17ac7872e3ce323838aedd78694dbcb5901d6ab1_SOUNDCQ20I_01_notice.pdfRead 15 October 2026Volume up and volume down are single presses of separate buttons.

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

Not available

Not available

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

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

Not available

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.

No5Spec databasesoundguys.com/product/anker-soundcore-q20i-hybridRead 15 October 2026Auto pause: no.

Voice assistant

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

Alexa, Google Assistant, Siri3Maker product pageankerjapan.com/blogs/faq/a3004-soundcore-q20iRead 15 October 2026A long press of the NC button for 2 seconds activates the voice assistant. The assistant names come from the SoundGuys listing.5Spec databasesoundguys.com/product/anker-soundcore-q20i-hybridRead 15 October 2026Voice assistant support: Alexa, Google Assistant, Siri.

Comfort and build

7 of 11 differ

Headband type

Not available

Padded5Spec databasesoundguys.com/product/anker-soundcore-q20i-hybridRead 15 October 2026Headband type: adjustable over-head, material plastic with padding.

Headband material

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

Plastic with padding5Spec databasesoundguys.com/product/anker-soundcore-q20i-hybridRead 15 October 2026Headband material: plastic with padding.

Frame material

Not available

Plastic5Spec databasesoundguys.com/product/anker-soundcore-q20i-hybridRead 15 October 2026Chassis primary material: plastic.

Ear cup material

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

Not available

Ear pad material

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

Memory foam5Spec databasesoundguys.com/product/anker-soundcore-q20i-hybridRead 15 October 2026Ear pad type: memory foam. The ear cup material row reads memory foam and PU leather.

Replaceable ear pads

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

Yes6Spec databaseifixit.com/Device/Anker_Soundcore_Q20iRead 15 October 2026The device page lists an Ear Pads replacement guide. The Q20i battery and LED diffuser guides begin with removing an ear pad.

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

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

Clip6Spec databaseifixit.com/Device/Anker_Soundcore_Q20iRead 15 October 2026The iFixit guides remove the ear pad by prying it out of the groove where it meets the driver assembly until it releases around the whole perimeter. No screws or glue are mentioned, so it is read as a press-fit pad.

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

Not available

Not available

Ear tips included

Not available

Not available

Dust and water rating

Not available

Not available

User-replaceable parts

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

Not available

Software

1 of 3 differ

Companion app

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

soundcore1Maker product pageus.soundcore.com/products/q20-hybrid-active-noise-cancelling-headphonesRead 15 October 2026Download the soundcore app for customizable EQ, 22 presets and the 3 listening modes.

App platforms

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

Android, iOS2Owner's manualeasylounge.com/cdn/shop/files/17ac7872e3ce323838aedd78694dbcb5901d6ab1_SOUNDCQ20I_01_notice.pdfRead 15 October 2026The manual shows the Google Play and Apple App Store marks for the soundcore app.

User firmware updates

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

Yes2Owner's manualeasylounge.com/cdn/shop/files/17ac7872e3ce323838aedd78694dbcb5901d6ab1_SOUNDCQ20I_01_notice.pdfRead 15 October 2026Firmware update page: the soundcore app tells you when a new firmware version is found.

Dimensions and weight

1 of 2 differ

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

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

Not available

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

2 of 3 differ

Hi-Res Audio

Not available

Hi-Res Audio1Maker product pageus.soundcore.com/products/q20-hybrid-active-noise-cancelling-headphonesRead 15 October 2026Compatible with Hi-Res certified audio via the AUX cable. iFixit also lists Hi-Res Audio certification. Stored as the wired Hi-Res Audio mark.6Spec databaseifixit.com/Device/Anker_Soundcore_Q20iRead 15 October 2026Background lists hi-res audio certification.

Communication certifications

Not available

Not available

FCC ID

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

Not available

Other certifications

Not available

TCO Certified1Maker product pageus.soundcore.com/products/q20-hybrid-active-noise-cancelling-headphonesRead 15 October 2026TCO Certified.

In the box

3 of 3 differ

In the box

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

Q20i headphones, USB-C cable, AUX cable1Maker product pageus.soundcore.com/products/q20-hybrid-active-noise-cancelling-headphonesRead 15 October 2026The page image alt text reads: bluetooth headphones with USB-C cable and AUX cable included. No full box list is printed. Cable lengths and a pouch are not stated.

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

AMarshall Monitor III A.N.C.

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

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

Bsoundcore Q20i

Type	Count
USB-C charging cable	1
AUX cable	1

Source1Maker product pageus.soundcore.com/products/q20-hybrid-active-noise-cancelling-headphonesRead 15 October 2026USB-C cable and AUX cable per the page image alt text.

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

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

Not available

Links

Not compared

Product page

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

us.soundcore.com/products/q20-hybrid-active-noise-cancelling-headphones1Maker product pageus.soundcore.com/products/q20-hybrid-active-noise-cancelling-headphonesRead 15 October 2026

Spec sheet

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

Not available

Manual

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

www.easylounge.com/cdn/shop/files/17ac7872e3ce323838aedd78694dbcb5901d6ab1_SOUNDCQ20I_01_notice.pdf2Owner's manualeasylounge.com/cdn/shop/files/17ac7872e3ce323838aedd78694dbcb5901d6ab1_SOUNDCQ20I_01_notice.pdfRead 15 October 2026Retailer-hosted copy of the maker's multilingual soundcore Q20i user manual. The English section is pages EN 01 to EN 03.

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

Not available

Not available

Warranty

1 of 1 differ

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

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

1.5years4Maker product pageus.soundcore.com/pages/warrantyRead 15 October 2026US warranty page: quality-related defects on all headphone series are covered by an 18-month warranty from the date of purchase. The same page covers every Q20i colour. Statutory warranties in other markets can be longer.

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