Headsets and headphones / Compare

Audio-Technica ATH-M20x vs Sennheiser HD 280 PRO

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Product A: Audio-Technica

ATH-M20x

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Product B: Sennheiser

HD 280 PRO

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Only differences

AAudio-Technica ATH-M20x

BSennheiser HD 280 PRO

General

5 of 8 differ

Series

M-Series1Maker product pageaudio-technica.co.jp/product/ATH-M20xRead 15 October 2026The page speaks of the ATH-M20 series and sits beside the other M-Series models. The M-Series name is from the 2014 launch release5Press articleprosoundweb.com/audio-technica-introduces-next-generation-m-series-headphonesRead 15 October 2026Audio-Technica has remastered its M-Series line of professional monitor headphones

Not available

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

ATH-M20x, ATH-M20x WH1Maker product pageaudio-technica.co.jp/product/ATH-M20xRead 15 October 2026Model number ATH-M20x. The white online-store model has its own page with model number ATH-M20x WH2Maker product pageaudio-technica.co.jp/product/ATH-M20x_WHRead 15 October 2026White online-store limited model, model number ATH-M20x WH. Release date 2024-09-27

5068451Maker product pagesennheiser.com/en-us/catalog/products/headphones/hd-280-pro/hd-280-pro-506845Read 23 October 2026Article no. 506845. Older retailer listings also show article 004974 for the pre-2016 version, which is not stored.

GTIN / EAN

4961310125400, 49613101631981Maker product pageaudio-technica.co.jp/product/ATH-M20xRead 15 October 2026JAN code 4961310125400 for ATH-M20x. The white model page gives 49613101631982Maker product pageaudio-technica.co.jp/product/ATH-M20x_WHRead 15 October 2026JAN code 4961310163198

615104271210, 40441552077748Retailer pagebhphotovideo.com/c/product/1320366-REG/sennheiser_hd_280_pro_closed.htmlRead 23 October 2026Kit page. The section for the HD 280 Pro headphones alone lists UPC 615104271210.9Retailer pagefleetnetwork.ca/products/506845Read 23 October 2026SKU and MPN 506845, UPC 615104271210.10Spec databasevideotesty.pl/produkt/215617Read 23 October 2026EAN 4044155207774, manufacturer code S506845. The eBay Germany listing for MPN 506845 gives the same number as its GTIN.

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

January 20146Press articlemusicradar.com/news/tech/namm-2014-audio-technica-reveals-new-m-series-headphones-591670Read 15 October 2026Article published 2014-01-23 reproduces the maker release dated 2014-01-20: the ATH-M20x made its debut at Winter NAMM 2014

September 20166Press articlemixonline.comRead 23 October 2026Trade report dated 09/30/2016 on the upgraded HD 280 PRO shown at the AES Convention in Los Angeles that week. audioXpress reported it on 2016-10-07.

Status

Available1Maker product pageaudio-technica.co.jp/product/ATH-M20xRead 15 October 2026Current product page, updated to a sales figure dated October 2026. Thomann also has it in stock7Retailer pagethomannmusic.com/audio_technica_ath_m20x.htmRead 15 October 2026In stock on the access date

Available1Maker product pagesennheiser.com/en-us/catalog/products/headphones/hd-280-pro/hd-280-pro-506845Read 23 October 2026Current US maker page with dealer links.

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

Not available

Not available

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

Not available

Not available

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

$695Press articleprosoundweb.com/audio-technica-introduces-next-generation-m-series-headphonesRead 15 October 2026U.S. MSRP: ATH-M20x $69. Street prices were lower, and SoundGuys later lists $49

$99.956Press articlemixonline.comRead 23 October 2026Reports a price of $99.95 for the upgraded model. US dollars, tax treatment not stated. The current US maker page also lists $99.95.

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

Not available

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

JP, US, EU1Maker product pageaudio-technica.co.jp/product/ATH-M20xRead 15 October 2026Sold in Japan by the maker. The US MSRP comes from the launch release3Maker spec sheet (PDF)docs.audio-technica.com/eu/DOC_ATH-M20x_30x_40x_50x.pdfRead 15 October 2026The file is an EU conformity file for the EMC and RoHS directives, with an authorized representative in Leeds, UK and distribution contacts in Germany, France and Hungary.5Press articleprosoundweb.com/audio-technica-introduces-next-generation-m-series-headphonesRead 15 October 2026U.S. MSRP published for the launch7Retailer pagethomannmusic.com/audio_technica_ath_m20x.htmRead 15 October 2026Thomann, a German shop, lists the black ATH-M20x in stock on the access date.

Not available

ColoursiThe maker's own colour names

Black, White2Maker product pageaudio-technica.co.jp/product/ATH-M20x_WHRead 15 October 2026White colour model (ホワイトカラーモデル), limited to the official online store7Retailer pagethomannmusic.com/audio_technica_ath_m20x.htmRead 15 October 2026Colour: Black. The white ATH-M20xWH is listed as a variation of the product

Black7Retailer pagethomann.ie/sennheiser_hd_280_pro_new.htmRead 23 October 2026Colour: Black.12Reviewrtings.com/headphones/reviews/sennheiser/hd-280-pro-2016Read 23 October 2026Differences section: one colour variant, Black. A Silver variant was sold for a limited time and is discontinued.

Segment

Studio1Maker product pageaudio-technica.co.jp/product/ATH-M20xRead 15 October 2026Product category: Professional monitor headphones (プロフェッショナルモニターヘッドホン)

Studio1Maker product pagesennheiser.com/en-us/catalog/products/headphones/hd-280-pro/hd-280-pro-506845Read 23 October 2026Page title: Closed-Back Professional Monitoring. Described as headphones for professional recording, mixing and monitoring.

Design

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Form factor

Over-ear7Retailer pagethomannmusic.com/audio_technica_ath_m20x.htmRead 15 October 2026Circumaural, over-ear design

Over-ear1Maker product pagesennheiser.com/en-us/catalog/products/headphones/hd-280-pro/hd-280-pro-506845Read 23 October 2026Features: Circumaural (over-ear) fit for full coverage. The page's Wearing style row says On-ear, which the maker's own spec sheet and feature text contradict. Stored as over-ear since the product specification states ear coupling circumaural.2Maker spec sheet (PDF)sennheiser.com/globalassets/digizuite/40985-en-hd_280_pro_product_specification_en.pdfRead 23 October 2026Specifications: Ear coupling circumaural.

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

Closed1Maker product pageaudio-technica.co.jp/product/ATH-M20xRead 15 October 2026Type: closed dynamic (密閉ダイナミック型)7Retailer pagethomannmusic.com/audio_technica_ath_m20x.htmRead 15 October 2026Closed-back

Closed1Maker product pagesennheiser.com/en-us/catalog/products/headphones/hd-280-pro/hd-280-pro-506845Read 23 October 2026Page title and summary: closed-back headphones.2Maker spec sheet (PDF)sennheiser.com/globalassets/digizuite/40985-en-hd_280_pro_product_specification_en.pdfRead 23 October 2026Specifications: Acoustic principle dynamic, closed.

Wearing style

Headband8Measurementsoundguys.com/audio-technica-ath-m20x-review-63732Read 15 October 2026Over-ear headphones with a padded crown band and a metal-reinforced headband

Headband2Maker spec sheet (PDF)sennheiser.com/globalassets/digizuite/40985-en-hd_280_pro_product_specification_en.pdfRead 23 October 2026Specifications: Wearing style headband.

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

None4Owner's manualaudio-technica.co.jp/pdf/support/ATH-M20x-50x_UM.pdfRead 15 October 2026The model table gives the ATH-M20x only items A (3.0 m cable) and E (6.3 mm adapter). The folded position G is listed for the ATH-M30x, ATH-M40x and ATH-M50x only. SoundGuys confirms that the ATH-M20x does not fold8Measurementsoundguys.com/audio-technica-ath-m20x-review-63732Read 15 October 2026The ATH-M20x does not fold down at all

Flat and inward1Maker product pagesennheiser.com/en-us/catalog/products/headphones/hd-280-pro/hd-280-pro-506845Read 23 October 2026Features: Collapsible, foldable design. Comfort text: Swiveling earcups and a folding headband make them easy to adjust and store. The spec sheet says folding and rotating earcups and the quick guide shows folded positions A, B and C with the cups turned and tucked toward the headband. Stored as flat and inward.2Maker spec sheet (PDF)sennheiser.com/globalassets/digizuite/40985-en-hd_280_pro_product_specification_en.pdfRead 23 October 2026Features: Folding and rotating earcups for space-saving transport.

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

Not available

Yes1Maker product pagesennheiser.com/en-us/catalog/products/headphones/hd-280-pro/hd-280-pro-506845Read 23 October 2026Comfort text: Swiveling earcups.2Maker spec sheet (PDF)sennheiser.com/globalassets/digizuite/40985-en-hd_280_pro_product_specification_en.pdfRead 23 October 2026Text: swiveling ear cups. Features: rotating earcups.

RGB lighting

Not available

Not available

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

Not available

Not available

Drivers and sound

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Driver type

Dynamic1Maker product pageaudio-technica.co.jp/product/ATH-M20xRead 15 October 2026Type: closed dynamic3Maker spec sheet (PDF)docs.audio-technica.com/eu/DOC_ATH-M20x_30x_40x_50x.pdfRead 15 October 2026Type: closed-back dynamic7Retailer pagethomannmusic.com/audio_technica_ath_m20x.htmRead 15 October 2026

Dynamic1Maker product pagesennheiser.com/en-us/catalog/products/headphones/hd-280-pro/hd-280-pro-506845Read 23 October 2026Tech specs: Transducer type Dynamic.

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

40mm1Maker product pageaudio-technica.co.jp/product/ATH-M20xRead 15 October 2026Driver: 40 mm, new strong-magnet CCAW voice coil driver3Maker spec sheet (PDF)docs.audio-technica.com/eu/DOC_ATH-M20x_30x_40x_50x.pdfRead 15 October 2026Driver diameter 40 mm. Voice coil: copper-clad aluminum wire7Retailer pagethomannmusic.com/audio_technica_ath_m20x.htmRead 15 October 202640 mm driver with neodymium magnet and copper-clad aluminium wire voice coils

Not available

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

Not available

Not available

Diaphragm material

Not available

Not available

Magnet

Neodymium3Maker spec sheet (PDF)docs.audio-technica.com/eu/DOC_ATH-M20x_30x_40x_50x.pdfRead 15 October 2026Magnet: neodymium7Retailer pagethomannmusic.com/audio_technica_ath_m20x.htmRead 15 October 2026Neodymium magnet

Neodymium8Retailer pagebhphotovideo.com/c/product/1320366-REG/sennheiser_hd_280_pro_closed.htmlRead 23 October 2026Features: Neodymium magnets for high maximum SPL.

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.

Min15 HzMax20 kHz1Maker product pageaudio-technica.co.jp/product/ATH-M20xRead 15 October 2026Frequency response 15 to 20,000 Hz3Maker spec sheet (PDF)docs.audio-technica.com/eu/DOC_ATH-M20x_30x_40x_50x.pdfRead 15 October 2026Frequency response 15 - 20,000 Hz7Retailer pagethomannmusic.com/audio_technica_ath_m20x.htmRead 15 October 2026

Min8 HzMax25 kHz1Maker product pagesennheiser.com/en-us/catalog/products/headphones/hd-280-pro/hd-280-pro-506845Read 23 October 2026Tech specs: Audio frequency response 8 - 25,000 Hz. No tolerance is given.2Maker spec sheet (PDF)sennheiser.com/globalassets/digizuite/40985-en-hd_280_pro_product_specification_en.pdfRead 23 October 2026Specifications: Frequency response 8 Hz to 25 kHz.

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.

47Ω1Maker product pageaudio-technica.co.jp/product/ATH-M20xRead 15 October 2026Impedance 47 ohm3Maker spec sheet (PDF)docs.audio-technica.com/eu/DOC_ATH-M20x_30x_40x_50x.pdfRead 15 October 2026Impedance 47 ohms7Retailer pagethomannmusic.com/audio_technica_ath_m20x.htmRead 15 October 2026

64Ω1Maker product pagesennheiser.com/en-us/catalog/products/headphones/hd-280-pro/hd-280-pro-506845Read 23 October 2026Tech specs: Nominal impedance 64 ohm.2Maker spec sheet (PDF)sennheiser.com/globalassets/digizuite/40985-en-hd_280_pro_product_specification_en.pdfRead 23 October 2026Specifications: Nominal impedance 64 ohm.

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.

96dB1Maker product pageaudio-technica.co.jp/product/ATH-M20xRead 15 October 2026Output sound pressure level: 96 dB/mW3Maker spec sheet (PDF)docs.audio-technica.com/eu/DOC_ATH-M20x_30x_40x_50x.pdfRead 15 October 2026Sensitivity 96 dB. The reference is not stated here7Retailer pagethomannmusic.com/audio_technica_ath_m20x.htmRead 15 October 2026

113dB5Owner's manualla-bs.com/Objets/HD280PRO_me.pdfRead 23 October 2026Maker instructions dated 06.06.2002 for the HD 280 pro and HD 280 silver, hosted by a retailer, so this is the first generation and not the 2016 article. Specifications: Sound pressure level 113 dB / 1 Vrms, and 102 dB as per IEC 268-7. The 2016 spec sheet gives the same 113 dB without a reference. The maker said the audio properties were unchanged in the 2016 update.

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

Per 1 mW1Maker product pageaudio-technica.co.jp/product/ATH-M20xRead 15 October 2026Published as 96 dB/mW

Per 1 V5Owner's manualla-bs.com/Objets/HD280PRO_me.pdfRead 23 October 2026113 dB / 1 Vrms in the first-generation manual. The current sheets do not state the reference.

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

Not available

0.1%1Maker product pagesennheiser.com/en-us/catalog/products/headphones/hd-280-pro/hd-280-pro-506845Read 23 October 2026Tech specs: Total harmonic distortion 0.1 %. The quick guide gives the test condition as less than 0.1 % at 1 kHz and 100 dB SPL. Stored as the upper bound.2Maker spec sheet (PDF)sennheiser.com/globalassets/digizuite/40985-en-hd_280_pro_product_specification_en.pdfRead 23 October 2026Specifications: THD 0.1 %. No test level is given on this sheet.3Owner's manualassets.sennheiser.com/download/assets/HD_280_Quick_Guide_05_2016.pdf/17fabe52e7b711f0a866ce3d75c40f07Read 23 October 2026Specifications: THD <0.1% (@ 1 kHz, 100 dB SPL).

Max input power

700mW1Maker product pageaudio-technica.co.jp/product/ATH-M20xRead 15 October 2026Maximum input 700 mW. The EU technical file adds at 1 kHz3Maker spec sheet (PDF)docs.audio-technica.com/eu/DOC_ATH-M20x_30x_40x_50x.pdfRead 15 October 2026Maximum input power 700 mW at 1 kHz7Retailer pagethomannmusic.com/audio_technica_ath_m20x.htmRead 15 October 2026Max. input level 700 mW at 1 kHz

500mW5Owner's manualla-bs.com/Objets/HD280PRO_me.pdfRead 23 October 2026Specifications: Long-term max. input power 0.5 W (as per IEC 268-7). Stored as 500 mW.11Retailer pagekirstein.de/en/Live-Studio/Headphones/HiFi-and-DJ-Headphones/Sennheiser-HD-280-Pro-2016.htmlRead 23 October 2026Rated power handling 500 mW. Bonedo and kopfhoerer.de give the same nominal rating of 500 mW. The maker's older manual (listed here) states 0.5 W long-term maximum input power.

Max digital audio sample rateiHighest supported digital audio sample rate over a USB cable or wireless dongle. This is not the microphone rate or acoustic frequency response.

Not available

Not available

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

Not available

Not available

DAC

Not available

Not available

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

Not available

Not available

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

Not available

Not available

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

Not available

Not available

EQ presets

Not available

Not available

Volume limit

Not available

Not available

Spatial audio

None of 3 known

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

Not available

Not available

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

Not available

Not available

Head tracking

Not available

Not available

Noise cancelling

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Active noise cancelling

No8Measurementsoundguys.com/audio-technica-ath-m20x-review-63732Read 15 October 2026The review describes passive isolation only and does not mention active noise cancelling

No12Reviewrtings.com/headphones/reviews/sennheiser/hd-280-pro-2016Read 23 October 2026Public header: Noise Cancelling No. Closed-back, dynamic, wired. The measured results are member-only and were not used.

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

Not available

Not available

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

Not available

Not available

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

Not available

Not available

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

Not available

Not available

ANC attenuation (claimed)

Not available

Not available

Transparency mode

Not available

Not available

Adjustable transparency

Not available

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

Not available

Not available

Measured

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

Under-emphasises almost the whole range against the SoundGuys studio curve, apart from a slight emphasis at 2 kHz. The main deviations are below 70 Hz and in the highs at 5 kHz and between 8 and 10 kHz.8Measurementsoundguys.com/audio-technica-ath-m20x-review-63732Read 15 October 2026SoundGuys lab measurement against its studio target curve. Slight emphasis at 2 kHz, under-emphasis elsewhere. Main deviations below 70 Hz, at 5 kHz and between 8 and 10 kHz. The review also notes that the ear cups rotate 15 degrees and that the headphones have no rotating ear cups, so the swivel field is left out

Fairly close to the SoundGuys preference curve. There is a dip between about 50 and 100 Hz and the sub-bass is slightly louder than ideal. The 2 to 8 kHz range is slightly under-emphasised and the response drops steeply above 10 kHz.13Reviewsoundguys.com/sennheiser-hd-280-pro-review-53109Read 23 October 2026SoundGuys measured response compared with its headphone preference curve. Review published 2022-04-05 and updated 2024-11-28. The page loads its graph dynamically, so the summary follows the written findings.

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

Not available

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

0 of 16 differ

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

None1Maker product pageaudio-technica.co.jp/product/ATH-M20xRead 15 October 2026The specification table has a driver, plug and cord section and no microphone section. The ATH-M20xSTS page of the same maker does list a microphone section

None12Reviewrtings.com/headphones/reviews/sennheiser/hd-280-pro-2016Read 23 October 2026Public header: Mic No.

Microphone element

Not available

Not available

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

Not available

Not available

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

Not available

Not available

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

Not available

Not available

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

Not available

Not available

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

Not available

Not available

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

Not available

Not available

Mic sample rateiExplicitly published digital microphone capture or speech sampling rate. State the audio route in the source note, or say it is unpublished. Internal capture does not prove the effective rate on every connection. Acoustic bandwidth, playback rate and generic microphone-chip capability do not qualify.

Not available

Not available

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

Not available

Not available

Flip to mute

Not available

Not available

Mute button

Not available

Not available

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

Not available

Not available

Sidetone

Not available

Not available

Adjustable sidetone

Not available

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

0 of 20 differ

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

Analog8Measurementsoundguys.com/audio-technica-ath-m20x-review-63732Read 15 October 2026The ATH-M20x connects to a source with a 3.5 mm cable and ships with a 1/4 inch adapter

Analog1Maker product pagesennheiser.com/en-us/catalog/products/headphones/hd-280-pro/hd-280-pro-506845Read 23 October 2026Tech specs: Connection Wired, connector 3.5 mm. Analog headphones with a coiled cable.

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

3.5 mm TRS, 6.35 mm1Maker product pageaudio-technica.co.jp/product/ATH-M20xRead 15 October 2026Plug: 6.3 mm standard and 3.5 mm mini, gold-plated stereo 2-way plug. Stereo is read as a 3-pole TRS plug4Owner's manualaudio-technica.co.jp/pdf/support/ATH-M20x-50x_UM.pdfRead 15 October 20266.3 mm stereo plug adapter (accessory) for the 3.5 mm gold-plated stereo plug7Retailer pagethomannmusic.com/audio_technica_ath_m20x.htmRead 15 October 20263.5 mm jack plug, 6.3 mm adapter included

3.5 mm TRS, 6.35 mm1Maker product pagesennheiser.com/en-us/catalog/products/headphones/hd-280-pro/hd-280-pro-506845Read 23 October 2026Features: Industry-standard 3.5 mm plug with 6.3 mm adapter. Third-party listings describe the plug as a stereo plug.

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

Fixed cable6Press articlemusicradar.com/news/tech/namm-2014-audio-technica-reveals-new-m-series-headphones-591670Read 15 October 2026Maker NAMM 2014 release: single-side cable exit with a permanently attached 3 m cable7Retailer pagethomannmusic.com/audio_technica_ath_m20x.htmRead 15 October 2026Replaceable cable: No. A fixed three-metre cable on the left-hand side8Measurementsoundguys.com/audio-technica-ath-m20x-review-63732Read 15 October 2026The cable is not detachable or replaceable

Fixed cable7Retailer pagethomann.ie/sennheiser_hd_280_pro_new.htmRead 23 October 2026Replaceable cable: No.11Retailer pagekirstein.de/en/Live-Studio/Headphones/HiFi-and-DJ-Headphones/Sennheiser-HD-280-Pro-2016.htmlRead 23 October 2026The cable is not detachable.13Reviewsoundguys.com/sennheiser-hd-280-pro-review-53109Read 23 October 2026The left ear cup wire is not removable.

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

3m1Maker product pageaudio-technica.co.jp/product/ATH-M20xRead 15 October 2026Cord length 3.0 m3Maker spec sheet (PDF)docs.audio-technica.com/eu/DOC_ATH-M20x_30x_40x_50x.pdfRead 15 October 2026Cable: 3.0 m (9.8 ft), straight, left-side exit6Press articlemusicradar.com/news/tech/namm-2014-audio-technica-reveals-new-m-series-headphones-591670Read 15 October 2026Permanently attached 3 m cable7Retailer pagethomannmusic.com/audio_technica_ath_m20x.htmRead 15 October 20263 m cable with 3.5 mm jack plug

3m1Maker product pagesennheiser.com/en-us/catalog/products/headphones/hd-280-pro/hd-280-pro-506845Read 23 October 2026Tech specs: Coiled cable, min. 1.3 m / max. 3 m. The longest length when stretched is stored.

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.

Not available

Not available

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.

Not available

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.

Yes1Maker product pageaudio-technica.co.jp/product/ATH-M20xRead 15 October 2026The table lists only a plug and a 3.0 m cord. No battery, charging or wireless item is listed, so analog playback needs no power

Yes1Maker product pagesennheiser.com/en-us/catalog/products/headphones/hd-280-pro/hd-280-pro-506845Read 23 October 2026Tech specs: Battery included N. Wired passive dynamic headphones with no electronics.

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

None1Maker product pageaudio-technica.co.jp/product/ATH-M20xRead 15 October 2026Wired plug and cord only. The wireless ATH-M20xBT is a separate model

None1Maker product pagesennheiser.com/en-us/catalog/products/headphones/hd-280-pro/hd-280-pro-506845Read 23 October 2026Wired headphones. The page lists only a wired connection.

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.

Not available

Not available

Bluetooth

Not available

Not available

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

Not available

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.

Not available

Not available

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

Not available

Not available

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

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

None of 3 known

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

Not available

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.

Not available

Not available

Official licence

Not available

Not available

Battery and charging

0 of 13 differ

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

Not available

Not available

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

Not available

Not available

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

Not available

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.

Not available

Not available

Battery life (claimed, max)

Not available

Not available

Battery life with ANC (claimed)

Not available

Not available

Battery life without ANC (claimed)

Not available

Not available

Charging port

None1Maker product pageaudio-technica.co.jp/product/ATH-M20xRead 15 October 2026No battery, charging or wireless item in the table

None1Maker product pagesennheiser.com/en-us/catalog/products/headphones/hd-280-pro/hd-280-pro-506845Read 23 October 2026Tech specs: Battery included N.

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

Not available

Not available

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

Not available

Not available

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

Not available

Not available

Use while charging

Not available

Not available

Charging dock or stand

Not available

Not available

Controls

1 of 6 differ

Controls

Not available

Not available

Volume control

None1Maker product pageaudio-technica.co.jp/product/ATH-M20xRead 15 October 2026No remote, control or microphone item in the table. The cord is a plain 3.0 m cord

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.

Not available

Not available

Wear detection

Not available

Not available

Voice assistant

Not available

Not available

Comfort and build

4 of 11 differ

Headband type

Padded7Retailer pagethomannmusic.com/audio_technica_ath_m20x.htmRead 15 October 2026Well padded and adjustable. The page lists swivelling ear cups up to 90 degrees, which the maker page and SoundGuys do not confirm, so no swivel value is stored. Its weight lines (251 g and 200 g with cable) are inconsistent and are not used8Measurementsoundguys.com/audio-technica-ath-m20x-review-63732Read 15 October 2026Headband is comfortable, with padding similar to the other ATH-M headsets

Padded3Owner's manualassets.sennheiser.com/download/assets/HD_280_Quick_Guide_05_2016.pdf/17fabe52e7b711f0a866ce3d75c40f07Read 23 October 2026Replacing spare parts: Headband padding. The headband carries a replaceable padded cushion.8Retailer pagebhphotovideo.com/c/product/1320366-REG/sennheiser_hd_280_pro_closed.htmlRead 23 October 2026Description: adjustable padded headband.

Headband material

Not available

Not available

Frame material

Plastic with metal reinforcements8Measurementsoundguys.com/audio-technica-ath-m20x-review-63732Read 15 October 2026Lightweight plastic build save for metal reinforcements

Polycarbonate1Maker product pagesennheiser.com/en-us/catalog/products/headphones/hd-280-pro/hd-280-pro-506845Read 23 October 2026Features: Rugged polycarbonate construction. Made to Travel: Built from tough polycarbonate.

Ear cup material

Plastic8Measurementsoundguys.com/audio-technica-ath-m20x-review-63732Read 15 October 2026Matte plastic ear cups with a glossy black logo. The build is lightweight plastic apart from metal reinforcements. The review text says both that the ear cups rotate 15 degrees and that the ATH-M20x has no rotating ear cups, so no swivel value is stored.

Plastic14Spec databasesoundguys.com/product/sennheiser-hd-280-proRead 23 October 2026Spec table: Chassis material Plastic. Bonedo also says the housing is entirely plastic.

Ear pad material

Vinyl8Measurementsoundguys.com/audio-technica-ath-m20x-review-63732Read 15 October 2026Vinyl-covered ear pads

Leatherette8Retailer pagebhphotovideo.com/c/product/1320366-REG/sennheiser_hd_280_pro_closed.htmlRead 23 October 2026Description: thick, padded leatherette earcups.

Replaceable ear pads

Yes1Maker product pageaudio-technica.co.jp/product/ATH-M20xRead 15 October 2026Sold separately: replacement ear pads HP-M30x

Yes1Maker product pagesennheiser.com/en-us/catalog/products/headphones/hd-280-pro/hd-280-pro-506845Read 23 October 2026Features: Soft, replaceable earpads. A pad set (2016+, article 572235) is listed as a spare part.

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.

Stretch-over9Owner's manualdocs.audio-technica.com/eu/p52521_mseries_earpad_replacement.pdfRead 21 October 2026Audio-Technica instruction P52521 for HP-EP replacement earpads names the ATH-M20x among the models. Step 2: slide the new earpad's flange into the slot of the earcup. Step 3: gently stretch the flange over the slot until the pad is securely in place.

Clip3Owner's manualassets.sennheiser.com/download/assets/HD_280_Quick_Guide_05_2016.pdf/17fabe52e7b711f0a866ce3d75c40f07Read 23 October 2026Replacing spare parts, Ear cushions: the drawing shows the pad pulled off the cup and pressed on around its rim. A press-fit pad counts as clip.

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 pads (HP-M30x)1Maker product pageaudio-technica.co.jp/product/ATH-M20xRead 15 October 2026Sold separately: replacement ear pads HP-M30x

Ear pads, Headband padding3Owner's manualassets.sennheiser.com/download/assets/HD_280_Quick_Guide_05_2016.pdf/17fabe52e7b711f0a866ce3d75c40f07Read 23 October 2026Replacing spare parts: Headband padding and Ear cushions. The spare pad set (article 572235) contains both ear cushions and a headband cushion.

Software

None of 3 known

Companion app

Not available

Not available

App platforms

Not available

Not available

User firmware updates

Not available

Not available

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.

190g(6.7 oz)1Maker product pageaudio-technica.co.jp/product/ATH-M20xRead 15 October 2026Mass without cord (質量(コード除く)): about 190 g. The cord is fixed, so the stored value excludes it, as the maker states3Maker spec sheet (PDF)docs.audio-technica.com/eu/DOC_ATH-M20x_30x_40x_50x.pdfRead 15 October 2026Weight 190 g (6.7 oz) without cable and connector8Measurementsoundguys.com/audio-technica-ath-m20x-review-63732Read 15 October 2026Review page lists 190 g, the same as the maker

285g(10.1 oz)1Maker product pagesennheiser.com/en-us/catalog/products/headphones/hd-280-pro/hd-280-pro-506845Read 23 October 2026Tech specs: Product weight 285 g. Features: 285 g without cable.2Maker spec sheet (PDF)sennheiser.com/globalassets/digizuite/40985-en-hd_280_pro_product_specification_en.pdfRead 23 October 2026Specifications: Weigth (w/o cable) 285 g. The spec sheet also states a contact pressure of 6 N and a sound pressure level of 113 dB, which have no field here.

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

1 of 3 differ

Hi-Res Audio

Not available

Not available

Communication certifications

Not available

Not available

FCC ID

Not available

Not available

Other certifications

EMC (2004/108/EC), RoHS (2011/65/EU)3Maker spec sheet (PDF)docs.audio-technica.com/eu/DOC_ATH-M20x_30x_40x_50x.pdfRead 15 October 2026Declaration of Conformity TCF No. ATTWCE-HP140318001 (PDF page 9, dated 18 March 2014) covers ATH-M20x/30x/40x/50x. It states conformity with the EMC Directive 2004/108/EC (EN 55103, EN 55020) and the RoHS Directive 2011/65/EU (EN 50581:2012). Section 2.4 describes a microphone and is a copy error, so it is not used.

EU RoHS Directive 2011/65/EU, UK RoHS Regulations 2012, WEEE Directive 2012/19/EU4Owner's manualassets.sennheiser.com/download/assets/PRO_HEADPHONES_HEADSETS_Safety_Guide_07_2025.pdf/1ffe0066e7d811f0aabe2a34179bc91dRead 23 October 2026Safety guide for PRO headphones, which lists the HD 280 PRO. It gives an EU declaration of conformity to the RoHS Directive (2011/65/EU), a UK declaration of conformity to the RoHS Regulations (2012) and WEEE disposal information under Directive 2012/19/EU.

In the box

2 of 3 differ

In the box

Headphones with fixed 3.0 m cable, 6.3 mm stereo plug adapter3Maker spec sheet (PDF)docs.audio-technica.com/eu/DOC_ATH-M20x_30x_40x_50x.pdfRead 15 October 2026Accessory included: 6.3 mm (1/4 inch) snap-on adapter. No pouch or other accessory is listed4Owner's manualaudio-technica.co.jp/pdf/support/ATH-M20x-50x_UM.pdfRead 15 October 2026Accessories for the ATH-M20x: the 6.3 mm stereo plug adapter7Retailer pagethomannmusic.com/audio_technica_ath_m20x.htmRead 15 October 2026Incl. a 6.3 mm adapter8Measurementsoundguys.com/audio-technica-ath-m20x-review-63732Read 15 October 2026Ships with a 1/4 inch adapter and no other extras

HD 280 PRO headphones, 3.5 mm jack plug to 6.3 mm adapter, Safety guide1Maker product pagesennheiser.com/en-us/catalog/products/headphones/hd-280-pro/hd-280-pro-506845Read 23 October 2026What's in the box: (1) HD 280 PRO Headphones, (1) 3.5 mm jack plug to 6.3 mm adapter, (1) Safety guide.2Maker spec sheet (PDF)sennheiser.com/globalassets/digizuite/40985-en-hd_280_pro_product_specification_en.pdfRead 23 October 2026Delivery includes: HD 280 PRO Monitoring Headphone, 3.5 mm jack plug to 6.3 mm adapter, Safety Guide.

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

AAudio-Technica ATH-M20x

Type	Length (m)	Count
Straight cable, fixed to the left ear cup	3	1

Source3Maker spec sheet (PDF)docs.audio-technica.com/eu/DOC_ATH-M20x_30x_40x_50x.pdfRead 15 October 2026Cable: 3.0 m (9.8 ft), straight, left-side exit. The MusicRadar copy of the maker release calls it permanently attached

BSennheiser HD 280 PRO

Type	Length (m)	Count
Coiled single-sided cable, permanently attached	3	1
3.5 mm jack plug to 6.3 mm adapter	Not available	1

Source1Maker product pagesennheiser.com/en-us/catalog/products/headphones/hd-280-pro/hd-280-pro-506845Read 23 October 2026Single-sided coiled cable is part of the headphones. The 3.5 mm to 6.3 mm adapter is in the box.

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

None8Measurementsoundguys.com/audio-technica-ath-m20x-review-63732Read 15 October 2026You don't get any extras, not even a carry bag

None1Maker product pagesennheiser.com/en-us/catalog/products/headphones/hd-280-pro/hd-280-pro-506845Read 23 October 2026The box contents list has no case or pouch.

Links

Not compared

Product page

www.audio-technica.co.jp/product/ATH-M20x1Maker product pageaudio-technica.co.jp/product/ATH-M20xRead 15 October 2026

www.sennheiser.com/en-us/catalog/products/headphones/hd-280-pro/hd-280-pro-5068451Maker product pagesennheiser.com/en-us/catalog/products/headphones/hd-280-pro/hd-280-pro-506845Read 23 October 2026

Spec sheet

docs.audio-technica.com/eu/DOC_ATH-M20x_30x_40x_50x.pdf3Maker spec sheet (PDF)docs.audio-technica.com/eu/DOC_ATH-M20x_30x_40x_50x.pdfRead 15 October 2026Official technical construction file TCF ATTWCE-HP140318001 dated 2014-03-18. The ATH-M20x table is on PDF page 6. Image-only PDF, read visually

www.sennheiser.com/globalassets/digizuite/40985-en-hd_280_pro_product_specification_en.pdf2Maker spec sheet (PDF)sennheiser.com/globalassets/digizuite/40985-en-hd_280_pro_product_specification_en.pdfRead 23 October 2026Product specification V1.0, one page, article no. 506845.

Manual

www.audio-technica.co.jp/pdf/support/ATH-M20x-50x_UM.pdf4Owner's manualaudio-technica.co.jp/pdf/support/ATH-M20x-50x_UM.pdfRead 15 October 2026Shared ATH-M50x, ATH-M40x, ATH-M30x and ATH-M20x user manual with a Japanese and an English section

assets.sennheiser.com/download/assets/HD_280_Quick_Guide_05_2016.pdf/17fabe52e7b711f0a866ce3d75c40f073Owner's manualassets.sennheiser.com/download/assets/HD_280_Quick_Guide_05_2016.pdf/17fabe52e7b711f0a866ce3d75c40f07Read 23 October 2026Quick Guide, document 566630/A02 dated 04/16.

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.

1year4Owner's manualaudio-technica.co.jp/pdf/support/ATH-M20x-50x_UM.pdfRead 15 October 2026Japanese warranty certificate: one year from purchase. It is valid only in Japan. This is Japan coverage, not a global warranty claim

2years1Maker product pagesennheiser.com/en-us/catalog/products/headphones/hd-280-pro/hd-280-pro-506845Read 23 October 2026US page: Warranty (years) 2. The safety guide also gives 24 months for Australia and New Zealand.

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