Headsets and headphones / Compare

Bose QuietComfort Headphones (2nd Gen) vs Sonos Ace Ultra

A

Product A: Bose

QuietComfort Headphones (2nd Gen)

87 of 161 known

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B

Product B: Sonos

Ace Ultra

71 of 161 known

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Only differences

ABose QuietComfort Headphones (2nd Gen)

BSonos Ace Ultra

General

6 of 8 differ

Series

QuietComfort1Maker product pagebose.com/p/headphones/bose-quietcomfort-headphones-2nd-gen/QC2G-HEADPHONEARN.htmlRead 8 October 2026Exact QuietComfort Headphones (2nd Gen) product identity. Ultra, original 2023 QuietComfort and soft-case SC packages are excluded.

Not available

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

443644, 895491-01002Owner's manualassets.bosecreative.com/m/1bc02035222c5422/original/901307_OG_QCHII-Headphonearn_en.pdfRead 8 October 2026Original Bose 2026 guide AM901307-0010 Rev01, regulatory pages 4-8 name model 443644. Commercial 895491-0100 comes from the exact retailer below.6Retailer pagenfm.com/bose-quietcomfort-2nd-gen-headphones-in-black-70869201/70869201.htmlRead 8 October 2026Exact US Black item 70869201 lists Model 895491-0100. The commercial identifier and regulatory 443644 are separate naming systems. No soft-case SC bundle or Ultra identifier.

S52A, ACEULUS1BLK, ACEULUS1, ACEULUS1AGAV, ACEULUS1SAND1Maker product pagesonos.com/en-us/shop/sonos-ace-ultraRead 14 October 2026Page data lists US SKUs: ACEULUS1BLK Black, ACEULUS1 Soft White, ACEULUS1AGAV Agave, ACEULUS1SAND Sand. S52A is the hardware model from the FCC filing as reported by TBreak.11Press articletbreak.com/tbreak/sonos-ace-ultra-headphones-fcc-filing-september-launchRead 14 October 2026TBreak: the heavily redacted FCC filing identifies the product as model S52A.

GTIN / EAN

0178178596846Retailer pagenfm.com/bose-quietcomfort-2nd-gen-headphones-in-black-70869201/70869201.htmlRead 8 October 2026Exact US Black item 70869201 lists UPC 017817859684. No soft-case SC bundle or Ultra identifier.

Not available

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

6 August 20263Press releasebose.com/pressroom/bose-updates-the-iconic-quietcomfort-headphonesRead 8 October 2026Dated maker launch announcement August 6 2026. Preorder August 8, shipping August 13.

1 September 20264Press articlehifi.fan/stories/sonos-ace-ultra-headphones-released-with-headphone-engine-2-and-audio-handoverRead 14 October 2026HiFi Editorial dated 1 September 2026: Sonos has announced the Ace Ultra.

Status

Available1Maker product pagebose.com/p/headphones/bose-quietcomfort-headphones-2nd-gen/QC2G-HEADPHONEARN.htmlRead 8 October 2026Exact US Black reference can be purchased at the time of access.

Available1Maker product pagesonos.com/en-us/shop/sonos-ace-ultraRead 14 October 2026Sonos US store shows Available now with Add to cart and in-stock offers.

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

Bose QuietComfort Headphones (2023)3Press releasebose.com/pressroom/bose-updates-the-iconic-quietcomfort-headphonesRead 8 October 2026The release refines the first-generation 2023 QuietComfort Headphones. No Ultra predecessor inferred.

Not available

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

Not available

Not available

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

$3593Press releasebose.com/pressroom/bose-updates-the-iconic-quietcomfort-headphonesRead 8 October 2026US launch paragraph states 359 USD. Excludes tax and later discounts.

$4491Maker product pagesonos.com/en-us/shop/sonos-ace-ultraRead 14 October 2026$449 on the Sonos US store, unchanged from the launch price reported by What Hi-Fi? and Tom's Guide.4Press articlehifi.fan/stories/sonos-ace-ultra-headphones-released-with-headphone-engine-2-and-audio-handoverRead 14 October 2026Retail prices 399 GBP, $449, AU$699 and EUR 449.5Reviewwhathifi.com/headphones/sonos-ace-ultraRead 14 October 2026Tested at 399 GBP / $449 / AU$699.

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

€4493Maker product pagesonos.com/de-de/shop/sonos-ace-ultraRead 14 October 2026449 EUR on the German Sonos store. German list prices include VAT. Press at launch also gave EUR 449.4Press articlehifi.fan/stories/sonos-ace-ultra-headphones-released-with-headphone-engine-2-and-audio-handoverRead 14 October 2026Retail prices 399 GBP, $449, AU$699 and EUR 449. Tax treatment is not stated.6Reviewtomsguide.com/audio/headphones/sonos-ace-reviewRead 14 October 2026The Sonos Ace Ultra land at $449 (399 GBP / 449 EUR).

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

US1Maker product pagebose.com/p/headphones/bose-quietcomfort-headphones-2nd-gen/QC2G-HEADPHONEARN.htmlRead 8 October 2026Exact US product page and US retailer SKU prove US sale. Page language alone is not used.

Not available

ColoursiThe maker's own colour names

Black1Maker product pagebose.com/p/headphones/bose-quietcomfort-headphones-2nd-gen/QC2G-HEADPHONEARN.htmlRead 8 October 2026Black selected on exact maker page. Reference is US Black 895491-0100. Other colourways are not variants in this reference file.

Black, Soft White, Agave, Sand1Maker product pagesonos.com/en-us/shop/sonos-ace-ultraRead 14 October 2026Colors: Black, Soft White, Agave, Sand. Finish: Matte.

Segment

Music1Maker product pagebose.com/p/headphones/bose-quietcomfort-headphones-2nd-gen/QC2G-HEADPHONEARN.htmlRead 8 October 2026Maker Headphones category, everyday music listening product. USB videoconferencing support does not establish a dedicated office edition.

Music1Maker product pagesonos.com/en-us/shop/sonos-ace-ultraRead 14 October 2026Maker markets premium wireless noise-canceling headphones for music, spatial audio and TV listening.

Design

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Form factor

Over-ear1Maker product pagebose.com/p/headphones/bose-quietcomfort-headphones-2nd-gen/QC2G-HEADPHONEARN.htmlRead 8 October 2026Technical Specifications explicitly Around Ear Circumaural.

Over-ear2Owner's manualsonos.com/en-us/guides/sonosaceultraRead 14 October 2026Over-ear headphones with ear cushions that surround the ears. What Hi-Fi? and SoundGuys call them over-ear.5Reviewwhathifi.com/headphones/sonos-ace-ultraRead 14 October 2026Reviewed as over-ear headphones.

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

Closed10Retailer pagebhphotovideo.com/c/product/1993087-REG/bose_895491_0100_quietcomfort_headphones_2nd_gen.htmlRead 8 October 2026Exact US Black 895491-0100 Specs, Open/Closed-Back: Closed-Back. No fold geometry substitution.

Closed9Reviewsoundguys.com/product/sonos-ace-ultraRead 14 October 2026Spec table: Acoustic design Closed-back.

Wearing style

Headband1Maker product pagebose.com/p/headphones/bose-quietcomfort-headphones-2nd-gen/QC2G-HEADPHONEARN.htmlRead 8 October 2026Technical Specifications Headband: On Head Adjustable.

Headband2Owner's manualsonos.com/en-us/guides/sonosaceultraRead 14 October 2026Adjustable headband that extends with ear cups on each side.

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

Flat and inward2Owner's manualassets.bosecreative.com/m/1bc02035222c5422/original/901307_OG_QCHII-Headphonearn_en.pdfRead 8 October 2026Care and Maintenance pages 37-38: rotate both cups flat, retract into the headband, fold the left cup inward toward the headband and place in the case.

Flat8Reviewtechradar.com/audio/wireless-headphones/sonos-ace-ultra-reviewRead 14 October 2026The Ace Ultra are not fully foldable, but the ear cups rotate flat for stowing in the case.

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

Yes2Owner's manualassets.bosecreative.com/m/1bc02035222c5422/original/901307_OG_QCHII-Headphonearn_en.pdfRead 8 October 2026Care and Maintenance page 37: rotate earcups inward until flat. B&H lists swivel No, which conflicts and is excluded.

Yes2Owner's manualsonos.com/en-us/guides/sonosaceultraRead 14 October 2026Plush ear cushions, rotating ear cups and an adjustable headband. TechRadar and Man of Many say the cups rotate flat and swivel both ways.

RGB lighting

Not available

Not available

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

Not available

Not available

Drivers and sound

5 of 20 differ

Driver type

Dynamic10Retailer pagebhphotovideo.com/c/product/1993087-REG/bose_895491_0100_quietcomfort_headphones_2nd_gen.htmlRead 8 October 2026Exact SKU Specs, Driver Type: Dynamic. Diameter omitted due to a credible 30 mm and 40 mm source conflict.

Dynamic1Maker product pagesonos.com/en-us/shop/sonos-ace-ultraRead 14 October 2026Custom 40 mm dynamic driver in each ear cup.

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

Not available

40mm1Maker product pagesonos.com/en-us/shop/sonos-ace-ultraRead 14 October 2026Custom 40 mm driver in each ear cup.

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

110Retailer pagebhphotovideo.com/c/product/1993087-REG/bose_895491_0100_quietcomfort_headphones_2nd_gen.htmlRead 8 October 2026Exact SKU Specs Number of Drivers: 1 per Earpiece. Microphones not counted as audio transducers.

11Maker product pagesonos.com/en-us/shop/sonos-ace-ultraRead 14 October 2026One 40 mm driver in each ear cup.

Diaphragm material

Not available

Not available

Magnet

Not available

Dual-ring magnet motor5Reviewwhathifi.com/headphones/sonos-ace-ultraRead 14 October 2026New Sonos-designed 40mm dynamic drive units with a dual-ring magnet motor structure.

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

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

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

Not available

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

Not available

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.

48kHz5Maker product pagebose.com/p/headphones/bose-quietcomfort-headphones-2nd-gen/QC2G-HEADPHONEARN.htmlRead 8 October 2026Wired listening FAQ: lossless USB input up to 24-bit/48 kHz. No Bluetooth codec maximum imported.

48kHz4Press articlehifi.fan/stories/sonos-ace-ultra-headphones-released-with-headphone-engine-2-and-audio-handoverRead 14 October 2026Wired listening via the USB-C port offers audio up to 16-bit/48kHz.5Reviewwhathifi.com/headphones/sonos-ace-ultraRead 14 October 2026Native support for 16-bit/48kHz is available via the wired USB connection.

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

24bits5Maker product pagebose.com/p/headphones/bose-quietcomfort-headphones-2nd-gen/QC2G-HEADPHONEARN.htmlRead 8 October 2026Wired listening FAQ: USB input 24-bit/48 kHz.

16bits4Press articlehifi.fan/stories/sonos-ace-ultra-headphones-released-with-headphone-engine-2-and-audio-handoverRead 14 October 2026Wired listening via the USB-C port offers audio up to 16-bit/48kHz.5Reviewwhathifi.com/headphones/sonos-ace-ultraRead 14 October 2026Native support for 16-bit/48kHz is available via the wired USB connection.

DAC

Not available

Not available

Personalised soundiA manufacturer-supported hearing test or ear scan creates a device sound profile tailored to the listener. Generic equalizer adjustments do not count.

Not available

Not available

Onboard EQiCustom playback EQ profiles stored in the headset and applied without the host app running. Note supported active connections. Receiver-only or software-only EQ does not count.

Not available

Not available

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

33Press releasebose.com/pressroom/bose-updates-the-iconic-quietcomfort-headphonesRead 8 October 2026Controls Connectivity Convenience section explicitly adjustable three-band EQ in Bose app.

81Maker product pagesonos.com/en-us/shop/sonos-ace-ultraRead 14 October 2026Use the Sonos app to adjust bass, mids and treble with 3-band or 8-band EQ. Stored as 8, the larger option.

EQ presets

Bass Boost, Treble Boost7Reviewsoundguys.com/i-tested-the-bose-quietcomfort-headphones-2nd-gen-and-theyre-a-legit-upgrade-161251Read 8 October 2026Sound section separately measures named Bass Boost and Treble Boost presets. No unnamed presets inferred.

Not available

Volume limit

Not available

Not available

Spatial audio

1 of 3 differ

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

Bose Immersive Audio, Cinema Mode3Press releasebose.com/pressroom/bose-updates-the-iconic-quietcomfort-headphonesRead 8 October 2026Immersive Listening section names Bose TrueSpatial and Bose Immersive Audio Still, Motion and Cinema listening modes. Works with any audio source, not licensed Dolby Atmos decoding.

Dolby Atmos, TrueCinema1Maker product pagesonos.com/en-us/shop/sonos-ace-ultraRead 14 October 2026Dolby Atmos with a compatible device and content. TrueCinema tunes the headphones to your room and a compatible Sonos soundbar and renders a 7.1.4 mix with spatial audio. Dolby Atmos and TrueCinema need compatible Sonos gear or content.5Reviewwhathifi.com/headphones/sonos-ace-ultraRead 14 October 2026Dolby Atmos spatial audio with head tracking and TrueCinema. No toggle in the app to switch Atmos on and off.

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

Yes3Press releasebose.com/pressroom/bose-updates-the-iconic-quietcomfort-headphonesRead 8 October 2026Still keeps virtual audio fixed in the room as the head moves. Motion follows head movement. Maker spatial head-movement behavior.

Yes1Maker product pagesonos.com/en-us/shop/sonos-ace-ultraRead 14 October 2026Sonos Intelligent Motion Processing with Dolby Head Tracking. Enable it in the Sonos app.

Noise cancelling

5 of 10 differ

Active noise cancelling

Yes1Maker product pagebose.com/p/headphones/bose-quietcomfort-headphones-2nd-gen/QC2G-HEADPHONEARN.htmlRead 8 October 2026Technical Specifications says active adjustable noise cancellation. ANC can be disabled in the app.

Yes1Maker product pagesonos.com/en-us/shop/sonos-ace-ultraRead 14 October 2026Adaptive Active Noise Cancellation uses ten microphones. Up to 2x more ANC than Sonos Ace at frequencies up to 65 Hz.5Reviewwhathifi.com/headphones/sonos-ace-ultraRead 14 October 2026Standard full ANC alongside Aware Mode. Ten microphones, up from eight.

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

Hybrid1Maker product pagebose.com/p/headphones/bose-quietcomfort-headphones-2nd-gen/QC2G-HEADPHONEARN.htmlRead 8 October 2026Acoustic Noise Cancelling FAQ explicitly identifies microphones inside and outside the earcups. Hybrid architecture, not inferred solely from adaptive controls.

Not available

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

63Press releasebose.com/pressroom/bose-updates-the-iconic-quietcomfort-headphonesRead 8 October 2026Noise section explicitly describes six-microphone system compensating for earcup seal gaps and maintaining active cancellation. Six is the complete system across headphones, not per cup. Separate call-microphone role count remains unproved.

Not available

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

Yes3Press releasebose.com/pressroom/bose-updates-the-iconic-quietcomfort-headphonesRead 8 October 2026Noise section identifies adaptive feedforward controls compensating gaps from glasses, hair and hats. ActiveSense increases cancellation for sudden sounds in Aware mode.

Yes1Maker product pagesonos.com/en-us/shop/sonos-ace-ultraRead 14 October 2026Adaptive ANC adjusts for changes in fit caused by head movement, glasses, hair and other factors.

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

109Reviewtomsguide.com/audio/headphones/bose-quietcomfort-headphones-2nd-gen-reviewRead 8 October 2026Review ANC section states 10 levels of adjustment. Off, Aware and custom mode counts are excluded.

Not available

ANC attenuation (claimed)

Not available

Not available

Transparency mode

Yes1Maker product pagebose.com/p/headphones/bose-quietcomfort-headphones-2nd-gen/QC2G-HEADPHONEARN.htmlRead 8 October 2026Aware Mode FAQ explicitly identifies transparency using microphone arrays to reproduce environmental sound.

Yes1Maker product pagesonos.com/en-us/shop/sonos-ace-ultraRead 14 October 2026Aware mode blends ambient sound with your content. Voice boost is optional.

Adjustable transparency

Yes3Press releasebose.com/pressroom/bose-updates-the-iconic-quietcomfort-headphonesRead 8 October 2026Custom Modes explicitly let users set individual balance between noise cancelling and acoustic transparency.

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

Yes4Owner's manualassets.bosecreative.com/m/1bc02035222c5422/original/901307_OG_QCHII-Headphonearn_en.pdfRead 8 October 2026Listening Modes Custom row, page 23: supports a wind block noise-control setting. This is selectable processing, not an inferred foam microphone windscreen.

Not available

Measured

2 of 21 differ

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

The measured response has slightly emphasized bass and mids. The treble has peaks and dips. Disabling ANC makes the response more uneven.7Reviewsoundguys.com/i-tested-the-bose-quietcomfort-headphones-2nd-gen-and-theyre-a-legit-upgrade-161251Read 8 October 2026Reviewer curves relative to the SoundGuys preference target, default profile and ANC on and off. Firmware and connection or codec are not published. Numerical dB and THD values are not read from graphs.

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

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

Speech was clear in quiet and reverberant rooms. Office noise weakened clarity. Street and wind tests suppressed more of the voice along with background noise.7Reviewsoundguys.com/i-tested-the-bose-quietcomfort-headphones-2nd-gen-and-theyre-a-legit-upgrade-161251Read 8 October 2026Ideal, office, street, wind and reverberant microphone demos. Firmware, phone, codec and USB or Bluetooth route are unreported. No numeric microphone frequency limits inferred.

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

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.

Not available

Not available

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

Not available

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.

Not available

Not available

Microphone

4 of 16 differ

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

Built-in7Reviewsoundguys.com/i-tested-the-bose-quietcomfort-headphones-2nd-gen-and-theyre-a-legit-upgrade-161251Read 8 October 2026Call section describes headphone microphones used for calls. The owner guide Device Voice Control section also identifies earcup microphones. No in-line microphone in the supplied analog cable.

Built-in1Maker product pagesonos.com/en-us/shop/sonos-ace-ultraRead 14 October 2026Ten microphones for noise control, calls, Aware mode and TrueCinema. No boom microphone.

Microphone element

Not available

Not available

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

Not available

Not available

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

Not available

Not available

Total microphonesiEvery physical microphone across the headset, including call, ANC and calibration microphones. Shared microphones count once. Excludes microphones in charging cases or receivers, and vibration sensors. Use an explicitly published physical total, never a sum of overlapping role counts.

Not available

101Maker product pagesonos.com/en-us/shop/sonos-ace-ultraRead 14 October 2026Ten microphones for noise control, calls, Aware mode and TrueCinema. The maker states the total for the headset.5Reviewwhathifi.com/headphones/sonos-ace-ultraRead 14 October 2026The Ace Ultra houses 10 microphones, up from eight.

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.

16kHz5Maker product pagebose.com/p/headphones/bose-quietcomfort-headphones-2nd-gen/QC2G-HEADPHONEARN.htmlRead 8 October 2026Wired listening FAQ: voice output signal up to 24-bit/16 kHz through USB-C. This is transmitted USB microphone audio, not acoustic microphone bandwidth.

Not available

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

Not available

DSP1Maker product pagesonos.com/en-us/shop/sonos-ace-ultraRead 14 October 2026Microphones target your voice and suppress background noise on calls. Stored as DSP processing. The maker does not claim AI processing.

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

Yes2Owner's manualassets.bosecreative.com/m/1bc02035222c5422/original/901307_OG_QCHII-Headphonearn_en.pdfRead 8 October 2026Noise Cancellation While On a Call, page 20: Self voice is activated so the user hears their voice naturally.

Yes1Maker product pagesonos.com/en-us/shop/sonos-ace-ultraRead 14 October 2026Sidetone helps your voice sound natural and clear during calls, even when ANC is enabled.2Owner's manualsonos.com/en-us/guides/sonosaceultraRead 14 October 2026Sidetone is a Noise Control setting in the Sonos app. It may not work when plugged into another device during a call.

Adjustable sidetone

Yes2Owner's manualassets.bosecreative.com/m/1bc02035222c5422/original/901307_OG_QCHII-Headphonearn_en.pdfRead 8 October 2026Page 20 directs Self voice adjustment through Bose app Settings. Maker FAQ says self voice is unavailable with ANC disabled.

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

10 of 20 differ

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

Analog, USB, Bluetooth2Owner's manualassets.bosecreative.com/m/1bc02035222c5422/original/901307_OG_QCHII-Headphonearn_en.pdfRead 8 October 2026Bluetooth menu pairing page 26, Aux Audio page 31 and USB Type-C Audio page 32 document these source audio routes. The analog source uses an active USB-C to 3.5 mm cable.

Bluetooth, USB, Analog1Maker product pagesonos.com/en-us/shop/sonos-ace-ultraRead 14 October 2026Bluetooth, USB-C line-in and USB-C to 3.5 mm. The product page lists USB-C and 3.5 mm.2Owner's manualsonos.com/en-us/guides/sonosaceultraRead 14 October 2026Bluetooth. The USB-C port takes line-in audio over a USB-C to 3.5 mm cable or a USB-C to USB-C cable. Bluetooth is disabled while a USB-C cable is connected.

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

3.5 mm TRS14Reviewrtings.com/headphones/reviews/bose/quietcomfort-headphones-2nd-genRead 8 October 2026Exact review Wired Gaming verdict identifies the included 1/8-inch TRS-to-USB-C cable as audio-only. This is the analog source plug. The headset has USB-C, requires power and disables voice pickup on this route per owner guide page 31.

Not available

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

USB-C2Owner's manualassets.bosecreative.com/m/1bc02035222c5422/original/901307_OG_QCHII-Headphonearn_en.pdfRead 8 October 2026Aux Audio page 31: both supplied cables attach to USB-C on the right cup. No 3.5 mm headset socket or original 2.5 mm jack.

USB-C2Owner's manualsonos.com/en-us/guides/sonosaceultraRead 14 October 2026USB-C to 3.5 mm cable and USB-C to USB-C cable both connect to the headphone USB-C port. Not compatible with third party cables.

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

Not available

1.2m1Maker product pagesonos.com/en-us/shop/sonos-ace-ultraRead 14 October 2026Longest included cable is the USB-C to 3.5 mm cable, 3.94 ft (1.2 m).

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

USB-C2Owner's manualassets.bosecreative.com/m/1bc02035222c5422/original/901307_OG_QCHII-Headphonearn_en.pdfRead 8 October 2026Headphone Controls diagram and Wired Connections identify USB-C port on right cup.

USB-C2Owner's manualsonos.com/en-us/guides/sonosaceultraRead 14 October 2026USB-C port for charging and line-in.

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

Yes2Owner's manualassets.bosecreative.com/m/1bc02035222c5422/original/901307_OG_QCHII-Headphonearn_en.pdfRead 8 October 2026USB Type-C Audio page 32 supports playback from a connected USB-C source.

Yes1Maker product pagesonos.com/en-us/shop/sonos-ace-ultraRead 14 October 2026Lossless audio over Bluetooth with aptX on a supported device, or via a USB-C connection.6Reviewtomsguide.com/audio/headphones/sonos-ace-reviewRead 14 October 2026Connectivity lists USB-C audio.

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

No2Owner's manualassets.bosecreative.com/m/1bc02035222c5422/original/901307_OG_QCHII-Headphonearn_en.pdfRead 8 October 2026Aux Audio page 31 requires the headphones to be powered on. Battery-depleted operation requires a powered USB connection, not passive analog playback.

Not available

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

None11Reviewrtings.com/headphones/reviews/bose/quietcomfort-headphones-2nd-genRead 8 October 2026Wireless Gaming verdict says no low-latency wireless dongle is included. Generic optional Bluetooth transmitters such as AirFly do not establish a dedicated 2.4 GHz headset receiver.

None2Owner's manualsonos.com/en-us/guides/sonosaceultraRead 14 October 2026Bluetooth headphones with Wi-Fi for the Sonos system. No dongle in the box.

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.com/p/headphones/bose-quietcomfort-headphones-2nd-gen/QC2G-HEADPHONEARN.htmlRead 8 October 2026Range FAQ: up to 30 ft (9 m). The maker metric claim of 9 m is stored, not a conversion of the rounded 30 ft. Walls, doors and radio interference reduce range.

Not available

Bluetooth

5.41Maker product pagebose.com/p/headphones/bose-quietcomfort-headphones-2nd-gen/QC2G-HEADPHONEARN.htmlRead 8 October 2026Technical Specifications explicitly Bluetooth 5.4. Bluetooth Low Energy listing does not establish LE Audio support.

6.01Maker product pagesonos.com/en-us/shop/sonos-ace-ultraRead 14 October 2026Bluetooth 6.0 supports audio streaming from any Bluetooth-enabled device.2Owner's manualsonos.com/en-us/guides/sonosaceultraRead 14 October 2026Bluetooth 6.0.6Reviewtomsguide.com/audio/headphones/sonos-ace-reviewRead 14 October 2026Connectivity: Bluetooth 6.0, WiFi, USB-C audio and 3.5mm input.

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

SBC, AAC7Reviewsoundguys.com/i-tested-the-bose-quietcomfort-headphones-2nd-gen-and-theyre-a-legit-upgrade-161251Read 8 October 2026Exact 2nd Gen review Connectivity section: SBC and AAC only, no LDAC or aptX. No sibling Ultra codec inherited.

SBC, AAC, aptX Adaptive Lossless5Reviewwhathifi.com/headphones/sonos-ace-ultraRead 14 October 2026Tech specs list SBC, AAC and aptX Lossless. aptX Lossless over Bluetooth is limited to 16-bit/44.1kHz files.6Reviewtomsguide.com/audio/headphones/sonos-ace-reviewRead 14 October 2026Specs: Codecs SBC, AAC, Qualcomm aptX Adaptive Lossless.7Retailer pagehk.tcacoustic.asia/products/sonos-ace-ultraRead 14 October 2026Distributor copy of the Sonos tech spec lists Bluetooth Codecs: SBC, AAC, aptX Adaptive Lossless. Sonos' own page does not name codecs. What Hi-Fi? writes aptX Lossless.9Reviewsoundguys.com/product/sonos-ace-ultraRead 14 October 2026Spec table: AAC, aptX Lossless, SBC.

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

No8Reviewexpertreviews.co.uk/technology/headphones-audio/bose-quietcomfort-headphones-2nd-gen-reviewRead 8 October 2026The exact base QCH2 review says no LE Audio and no Auracast. Source tested for 3 weeks. Original Ultra or Ultra 2 later beta firmware excluded.

Not available

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

No7Reviewsoundguys.com/i-tested-the-bose-quietcomfort-headphones-2nd-gen-and-theyre-a-legit-upgrade-161251Read 8 October 2026Connectivity: no Auracast at launch. Later Ultra LE Audio and Auracast firmware is excluded from this base model.

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.com/p/headphones/bose-quietcomfort-headphones-2nd-gen/QC2G-HEADPHONEARN.htmlRead 8 October 2026FAQ explicitly maintains connection to two devices simultaneously.

Yes2Owner's manualsonos.com/en-us/guides/sonosaceultraRead 14 October 2026Using Multipoint, you can connect Sonos Ace Ultra to 2 Bluetooth devices and automatically switch between audio streams. Multipoint is off by default. Turn it on in Sonos Ace Ultra Settings.

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

21Maker product pagebose.com/p/headphones/bose-quietcomfort-headphones-2nd-gen/QC2G-HEADPHONEARN.htmlRead 8 October 2026FAQ explicitly two simultaneous Bluetooth source connections. Pairing memory is separate.

22Owner's manualsonos.com/en-us/guides/sonosaceultraRead 14 October 2026Connect to 2 Bluetooth devices.

Paired devices remembered

Not available

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

Google Fast Pair2Owner's manualassets.bosecreative.com/m/1bc02035222c5422/original/901307_OG_QCHII-Headphonearn_en.pdfRead 8 October 2026Bluetooth Connections, page 30: Google Fast Pair enables one-tap pairing on Android devices. Bluetooth and Location must be enabled. No Swift Pair inferred.

Not available

Base station

Not available

Not available

Latency

None of 2 known

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

Not available

Not available

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

Not available

Not available

Compatibility

1 of 3 differ

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

Android, iOS12Owner's manualassets.bosecreative.com/m/1bc02035222c5422/original/901307_OG_QCHII-Headphonearn_en.pdfRead 8 October 2026Bose App setup page 12 directs to the App Store and Google Play. Bluetooth Fast Pair is explicitly Android. Phone Call and Voice Control sections document microphone operation on a paired mobile source. No specific desktop or console USB compatibility is inferred from generic computer charging instructions.

Android, iOS1Maker product pagesonos.com/en-us/shop/sonos-ace-ultraRead 14 October 2026The Sonos app and TV Audio Swap work on iOS and Android. Bluetooth works with any Bluetooth-enabled device.

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

ABose QuietComfort Headphones (2nd Gen)

Platform	Connection	Microphone works
Android	Bluetooth	Yes
iOS	Bluetooth	Yes

Source12Owner's manualassets.bosecreative.com/m/1bc02035222c5422/original/901307_OG_QCHII-Headphonearn_en.pdfRead 8 October 2026Phone Call and Voice Control sections document microphone operation on a paired mobile source over Bluetooth. Bose App setup page 12 directs to the App Store and Google Play. No specific desktop or console USB compatibility is inferred from generic computer charging instructions.

BSonos Ace Ultra

Not available

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.

530mAh10Retailer pagebhphotovideo.com/c/product/1993087-REG/bose_895491_0100_quietcomfort_headphones_2nd_gen.htmlRead 8 October 2026Exact SKU Battery section: 530 mAh LiPo battery. Typical or rated basis unstated. Manufacturer manual omits capacity. The exact 2nd Gen John Lewis item independently indexed 530 mAh. Inaccurate retailer cable and wired-support rows are excluded.

1,060mAh1Maker product pagesonos.com/en-us/shop/sonos-ace-ultraRead 14 October 2026A 1060 mAh lithium-ion battery.

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

No2Owner's manualassets.bosecreative.com/m/1bc02035222c5422/original/901307_OG_QCHII-Headphonearn_en.pdfRead 8 October 2026Safety section says battery removal is only by a qualified professional. Page 39 directs Bose battery service and compatible Bose-certified batteries. No routine user exchange or disposal procedure is represented as swappable operation.

Yes1Maker product pagesonos.com/en-us/shop/sonos-ace-ultraRead 14 October 2026Replace the parts. Keep the headphones. The ear cushions and battery are designed to be swapped out.2Owner's manualsonos.com/en-us/guides/sonosaceultraRead 14 October 2026Power and Connectivity: Battery (replaceable). Replacement instructions are on the Sonos website.5Reviewwhathifi.com/headphones/sonos-ace-ultraRead 14 October 2026You can replace the headphones' battery yourself.

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

Not available

11Maker product pagesonos.com/en-us/shop/sonos-ace-ultraRead 14 October 2026One battery in the headphones.

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

ABose QuietComfort Headphones (2nd Gen)

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

Source4Owner's manualassets.bosecreative.com/m/1bc02035222c5422/original/901307_OG_QCHII-Headphonearn_en.pdfRead 8 October 2026Battery page 34: 24 h full ANC with Immersive Audio off and 18 h full ANC with Immersive Audio on. Connection and codec are unstated in this claim, so the rows leave them unknown. Maker product footnote gives 75 dB SPL volume. These are not ANC-off figures or the Ultra 30 h.

BSonos Ace Ultra

Connection	ANC	Hours (h)
Bluetooth	Yes	35
Bluetooth	No	50

Source1Maker product pagesonos.com/en-us/shop/sonos-ace-ultraRead 14 October 2026Up to 35 hours of listening time with Active Noise Cancellation or Aware mode on, at moderate volume. The Product Guide adds up to 50 hours with ANC off. Battery life depends on usage, settings and environmental factors.2Owner's manualsonos.com/en-us/guides/sonosaceultraRead 14 October 2026Guide overview: listen up to 35 hours with Adaptive Noise Cancellation on, or up to 50 hours with ANC off. Spec section: 35 hours with ANC or Aware mode on.

Battery life (claimed, max)

24h=CalculatedFrom Claimed battery life

50h=CalculatedFrom Claimed battery life

Battery life with ANC (claimed)

24h=CalculatedFrom Claimed battery life

35h=CalculatedFrom Claimed battery life

Battery life without ANC (claimed)

Not available

50h=CalculatedFrom Claimed battery life

Charging port

USB-C2Owner's manualassets.bosecreative.com/m/1bc02035222c5422/original/901307_OG_QCHII-Headphonearn_en.pdfRead 8 October 2026Battery page 33: charges through the right-earcup USB-C.

USB-C2Owner's manualsonos.com/en-us/guides/sonosaceultraRead 14 October 2026Use the included USB-C cable and a compliant USB-C power supply, 7.5 W minimum (15 W recommended).

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

180min2Owner's manualassets.bosecreative.com/m/1bc02035222c5422/original/901307_OG_QCHII-Headphonearn_en.pdfRead 8 October 2026Battery page 34 says allow up to 3 hours. Faster powered off. Slower during use.

180min1Maker product pagesonos.com/en-us/shop/sonos-ace-ultraRead 14 October 2026A full charge from 0% can take up to 3 hours. Stored as 180 minutes, the upper bound.2Owner's manualsonos.com/en-us/guides/sonosaceultraRead 14 October 2026Full charge from 0% can require up to 3 hours.

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

15min2Owner's manualassets.bosecreative.com/m/1bc02035222c5422/original/901307_OG_QCHII-Headphonearn_en.pdfRead 8 October 2026Battery page 34: a 15 minute charge of a depleted battery gives up to 2.5 hours with ANC on and Immersive Audio off.

3min1Maker product pagesonos.com/en-us/shop/sonos-ace-ultraRead 14 October 2026Rapid charging provides up to 3 hours of listening time from a 3-minute charge starting at 0%.

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

2.5h2Owner's manualassets.bosecreative.com/m/1bc02035222c5422/original/901307_OG_QCHII-Headphonearn_en.pdfRead 8 October 2026Page 34 footnote: 75 dB SPL playback, 3-band EQ at zero, Quiet full ANC and Immersive Audio off. Up to 2.5 h. The Immersive Audio on alternative of 2 h is not this field. Maker test conducted April 2025 on production-representative 2nd Gen units.

3h1Maker product pagesonos.com/en-us/shop/sonos-ace-ultraRead 14 October 2026Rapid charging provides up to 3 hours of listening time from a 3-minute charge starting at 0%. The guide says rapid charging needs 15 to 30 C and a charger between 5 W and 12 W for top speed.

Use while charging

Yes2Owner's manualassets.bosecreative.com/m/1bc02035222c5422/original/901307_OG_QCHII-Headphonearn_en.pdfRead 8 October 2026Battery page 33: Bluetooth or USB audio during charging. Page 32 supports battery-depleted operation using external USB power. Analog playback while charging is not asserted.

Yes2Owner's manualsonos.com/en-us/guides/sonosaceultraRead 14 October 2026While Sonos Ace Ultra is charging, you can continue listening to a Bluetooth-connected device.

Charging dock or stand

Not available

Not available

Controls

5 of 6 differ

Controls

Buttons2Owner's manualassets.bosecreative.com/m/1bc02035222c5422/original/901307_OG_QCHII-Headphonearn_en.pdfRead 8 October 2026Headphone Controls pages 13-19 describe the Bluetooth/Power switch, Action, multifunction and volume buttons. No touch controls inferred.

Buttons, Slider2Owner's manualsonos.com/en-us/guides/sonosaceultraRead 14 October 2026Content Key slides up and down for volume and presses for playback and calls. Noise Control button on the right cup. Power/Bluetooth button on the left cup.

Volume control

Buttons2Owner's manualassets.bosecreative.com/m/1bc02035222c5422/original/901307_OG_QCHII-Headphonearn_en.pdfRead 8 October 2026Media Playback and Volume page 16 uses plus and minus buttons.

Not available

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

Not available

Not available

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

Yes2Owner's manualassets.bosecreative.com/m/1bc02035222c5422/original/901307_OG_QCHII-Headphonearn_en.pdfRead 8 October 2026Shortcuts page 19 allows enabling, disabling or changing the Action-button shortcut through the app. Other fixed buttons are not described as remappable.

Not available

Wear detection

No9Reviewtomsguide.com/audio/headphones/bose-quietcomfort-headphones-2nd-gen-reviewRead 8 October 2026Review Specs and Design sections state no wear detection. No RGB or additional microphone sensors inferred from missing wear detection.

Yes1Maker product pagesonos.com/en-us/shop/sonos-ace-ultraRead 14 October 2026The music pauses when you take off the headphones and resumes when you put them back on.2Owner's manualsonos.com/en-us/guides/sonosaceultraRead 14 October 2026Sensors in the ear cups detect if you are wearing them. On by default.6Reviewtomsguide.com/audio/headphones/sonos-ace-reviewRead 14 October 2026Specs: Wear detection Yes.

Voice assistant

Not available

Voice assistant of the connected device, such as Siri or Gemini1Maker product pagesonos.com/en-us/shop/sonos-ace-ultraRead 14 October 2026Noise Control button on the right cup. Long press to activate your voice assistant.2Owner's manualsonos.com/en-us/guides/sonosaceultraRead 14 October 2026Press and hold the Noise Control / Voice Control button to activate your device voice assistant, such as Siri or Gemini.

Comfort and build

5 of 11 differ

Headband type

Padded3Press releasebose.com/pressroom/bose-updates-the-iconic-quietcomfort-headphonesRead 8 October 2026Refined Design section explicitly plush soft synthetic-leather headband cushioning.

Padded2Owner's manualsonos.com/en-us/guides/sonosaceultraRead 14 October 2026Adjustable headband with the right amount of padding. Man of Many mentions Rebound memory foam padding.

Headband material

Plastic with protein-leather cushioning1Maker product pagebose.com/p/headphones/bose-quietcomfort-headphones-2nd-gen/QC2G-HEADPHONEARN.htmlRead 8 October 2026Product comparison identifies streamlined plastic headband. Protein-leather material and plush headband cushioning are described in exact product specs and launch release. No prior-model steel reinforcement imported.

Not available

Frame material

Plastic yoke1Maker product pagebose.com/p/headphones/bose-quietcomfort-headphones-2nd-gen/QC2G-HEADPHONEARN.htmlRead 8 October 2026Product comparison, exact second-generation column explicitly plastic yoke. This describes the structural yoke, not a claim that every internal part is plastic.

Stainless steel2Owner's manualsonos.com/en-us/guides/sonosaceultraRead 14 October 2026Finish: stainless steel. The stainless steel headband smoothly extends and stays securely in place.

Ear cup material

Not available

Not available

Ear pad material

Protein leather1Maker product pagebose.com/p/headphones/bose-quietcomfort-headphones-2nd-gen/QC2G-HEADPHONEARN.htmlRead 8 October 2026Technical Specifications Ear Cushion Material explicitly Protein Leather.

Memory foam covered in vegan leather2Owner's manualsonos.com/en-us/guides/sonosaceultraRead 14 October 2026Finish lists vegan leather. Tom's Guide and Man of Many describe memory foam ear cushions. SoundGuys lists memory foam and synthetic leather.

Replaceable ear pads

Yes1Maker product pagebose.com/p/headphones/bose-quietcomfort-headphones-2nd-gen/QC2G-HEADPHONEARN.htmlRead 8 October 2026Technical Specifications says Removable Cushion. Owner guide pages 40-41 releases and reinstalls all retaining tabs and identifies replacement accessories.

Yes1Maker product pagesonos.com/en-us/shop/sonos-ace-ultraRead 14 October 2026Ear cushions are designed to be swapped out. Ear cushions are sold as accessories.2Owner's manualsonos.com/en-us/guides/sonosaceultraRead 14 October 2026Ear cushions can be easily replaced if they wear out over time.

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.

Clip2Owner's manualassets.bosecreative.com/m/1bc02035222c5422/original/901307_OG_QCHII-Headphonearn_en.pdfRead 8 October 2026Pages 40-41: release tabs around the earcup rim and snap every tab back into place. Stored as clip, not magnetic or twist-lock.

Magnetic2Owner's manualsonos.com/en-us/guides/sonosaceultraRead 14 October 2026Each cushion is securely held in place by magnets and can be removed with a light pull. It snaps into place when reattached.5Reviewwhathifi.com/headphones/sonos-ace-ultraRead 14 October 2026Ear pads attach magnetically and replacements cost about 40 GBP / $40.

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, USB-C cables2Owner's manualassets.bosecreative.com/m/1bc02035222c5422/original/901307_OG_QCHII-Headphonearn_en.pdfRead 8 October 2026Pages 40-41 show removable cushions and page 39 lists replacement accessories. Both USB cables are separate replaceable accessories. Battery service is excluded.

Ear cushions, Battery1Maker product pagesonos.com/en-us/shop/sonos-ace-ultraRead 14 October 2026The ear cushions and battery are designed to be swapped out. Ear cushions $39 and a replacement battery kit $25 are sold by Sonos.2Owner's manualsonos.com/en-us/guides/sonosaceultraRead 14 October 2026Spec section: Battery (replaceable). Ear cushion replacement section.

Software

1 of 3 differ

Companion app

Bose2Owner's manualassets.bosecreative.com/m/1bc02035222c5422/original/901307_OG_QCHII-Headphonearn_en.pdfRead 8 October 2026Bose App page 12 identifies the app for setup and product control.

Sonos2Owner's manualsonos.com/en-us/guides/sonosaceultraRead 14 October 2026Sonos app. Settings, EQ, noise control and updates are in the app.

App platforms

Android, iOS2Owner's manualassets.bosecreative.com/m/1bc02035222c5422/original/901307_OG_QCHII-Headphonearn_en.pdfRead 8 October 2026Bose App setup diagram gives App Store and Google Play. Google Fast Pair is explicitly Android. The Tom's Guide review independently names iOS and Android app support.

Android, iOS2Owner's manualsonos.com/en-us/guides/sonosaceultraRead 14 October 2026Sonos app on iOS and Android. TV Audio Swap works on iOS and Android.

User firmware updates

Yes2Owner's manualassets.bosecreative.com/m/1bc02035222c5422/original/901307_OG_QCHII-Headphonearn_en.pdfRead 8 October 2026Care and Maintenance page 39: updates automatically when the Bose app finds firmware. Alternative user update via btu.Bose.com on a computer.

Yes2Owner's manualsonos.com/en-us/guides/sonosaceultraRead 14 October 2026Sonos app Settings, About: check for software updates and see the current software version.

Dimensions and weight

2 of 2 differ

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

230g(8.1 oz)5Maker product pagebose.com/p/headphones/bose-quietcomfort-headphones-2nd-gen/QC2G-HEADPHONEARN.htmlRead 8 October 2026Technical Specs, Entire Product System: 0.507 lb. Converted using 453.59237 g/lb and rounded to 0.1 g. Published rounded claim, cable condition unstated. SoundGuys 230 g agrees. TechRadar 241 g conflicts. No reviewer measurement is asserted.

325g(11.5 oz)2Owner's manualsonos.com/en-us/guides/sonosaceultraRead 14 October 2026Details and Dimensions: Weight 0.72 lbs (325 g). The product page says 0.71 lbs (322 g). The guide is preferred over the product page. Tom's Guide, What Hi-Fi? and SoundGuys repeat 322 g.

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

Width163Height193Depth84mm(6.4 × 7.6 × 3.3 in)2Owner's manualsonos.com/en-us/guides/sonosaceultraRead 14 October 2026Details and Dimensions: Height 7.60 in (193 mm), Width 6.42 in (163 mm), Depth 3.31 in (84 mm). The product page lists a single unit with ear cup width 90.8 mm and depth 45 mm, which are not stored.

Certifications

0 of 3 differ

Hi-Res Audio

Not available

Not available

Communication certifications

Not available

Not available

FCC ID

A944436442Owner's manualassets.bosecreative.com/m/1bc02035222c5422/original/901307_OG_QCHII-Headphonearn_en.pdfRead 8 October 2026Regulatory section gives FCC ID A94443644 for model 443644.

Not available

Other certifications

Not available

Not available

In the box

3 of 3 differ

In the box

QuietComfort Headphones (2nd Gen), Carry case, USB-C to USB-C cable, USB-C to 3.5 mm cable, Safety Sheet5Maker product pagebose.com/p/headphones/bose-quietcomfort-headphones-2nd-gen/QC2G-HEADPHONEARN.htmlRead 8 October 2026Product What is in the box inventory. Technical Specs says Audio Cable Included No, which the inventory and FAQ contradict, so it is excluded.

Sonos Ace Ultra headphones, Travel case with removable cable pouch, USB-C to USB-C cable, USB-C to 3.5 mm cable, Quickstart Guide and legal and warranty information1Maker product pagesonos.com/en-us/shop/sonos-ace-ultraRead 14 October 2026Box contents: travel case, USB-C to USB-C cable, USB-C to 3.5 mm cable, Set Up Guide and legal and warranty information. The headphones themselves are included.

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

ABose QuietComfort Headphones (2nd Gen)

Type	Length (m)	Count
USB-C to USB-C	0.9906	1
USB-C to 3.5 mm	Not available	1

Source5Maker product pagebose.com/p/headphones/bose-quietcomfort-headphones-2nd-gen/QC2G-HEADPHONEARN.htmlRead 8 October 2026Maker inventory lists a C-to-C 39 in cable plus a USB-C-to-3.5 mm cable. Analog length left unknown. The B&H 20 in charging cable claim conflicts and is excluded.

BSonos Ace Ultra

Type	Length (m)	Count
USB-C to USB-C cable	0.75	1
USB-C to 3.5 mm cable	1.2	1

Source1Maker product pagesonos.com/en-us/shop/sonos-ace-ultraRead 14 October 2026USB-C to USB-C cable 2.46 ft (0.75 m). USB-C to 3.5 mm cable 3.94 ft (1.2 m).2Owner's manualsonos.com/en-us/guides/sonosaceultraRead 14 October 2026USB-C to USB-C cable 2.46 ft (0.75 m). USB-C to 3.5 mm cable 3.94 ft (1.2 m).

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

Hard4Owner's manualassets.bosecreative.com/m/1bc02035222c5422/original/901307_OG_QCHII-Headphonearn_en.pdfRead 8 October 2026Store the Headphones pages 37-38 depict a protective zipper carrying case. The SoundGuys review calls it a sturdy protective case. The US Black reference includes the hard case, not the SC soft-case package.

Not available

Links

Not compared

Product page

www.bose.com/p/headphones/bose-quietcomfort-headphones-2nd-gen/QC2G-HEADPHONEARN.html1Maker product pagebose.com/p/headphones/bose-quietcomfort-headphones-2nd-gen/QC2G-HEADPHONEARN.htmlRead 8 October 2026Exact current maker product page with Black colour selection.

www.sonos.com/en-us/shop/sonos-ace-ultra1Maker product pagesonos.com/en-us/shop/sonos-ace-ultraRead 14 October 2026

Spec sheet

www.bose.com/p/headphones/bose-quietcomfort-headphones-2nd-gen/QC2G-HEADPHONEARN.html1Maker product pagebose.com/p/headphones/bose-quietcomfort-headphones-2nd-gen/QC2G-HEADPHONEARN.htmlRead 8 October 2026Maker Technical Specifications and product FAQ. No separate technical datasheet was found.

www.sonos.com/en-us/shop/sonos-ace-ultra1Maker product pagesonos.com/en-us/shop/sonos-ace-ultraRead 14 October 2026The Tech Specs tab on the product page.

Manual

assets.bosecreative.com/m/1bc02035222c5422/original/901307_OG_QCHII-Headphonearn_en.pdf2Owner's manualassets.bosecreative.com/m/1bc02035222c5422/original/901307_OG_QCHII-Headphonearn_en.pdfRead 8 October 2026Official Bose-hosted 45-page English Owner Guide linked from the current product page. Not the QuietComfort 2 2003 guide or the Ultra guide.

www.sonos.com/en-us/guides/sonosaceultra2Owner's manualsonos.com/en-us/guides/sonosaceultraRead 14 October 2026Sonos Ace Ultra product guide.

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.

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Warranty

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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.

1year1Maker product pagebose.com/p/headphones/bose-quietcomfort-headphones-2nd-gen/QC2G-HEADPHONEARN.htmlRead 8 October 2026US product page Bose 1-Year Limited Warranty section. Starts immediately and covers mechanical breakdown and battery failure. Optional BoseCare years excluded.

1year10Maker product pagesonos.com/en-us/legal/terms-of-useRead 14 October 2026Section 10(a): Sonos warrants the Product for one (1) year after the date of original purchase against defects in materials and workmanship. US English terms. The Sonos warranty extension of 2024 excludes portable and wearable products.

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