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Sennheiser ACCENTUM Plus Wireless vs Sennheiser HD 550

A

Product A: Sennheiser

ACCENTUM Plus Wireless

87 of 161 known

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B

Product B: Sennheiser

HD 550

51 of 161 known

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All 161 fields

Every value links to where we found it.

Only differences

ASennheiser ACCENTUM Plus Wireless

BSennheiser HD 550

General

6 of 8 differ

Series

ACCENTUM1Maker spec sheet (PDF)boulanger.scene7.com/is/content/Boulanger/4260752330596_f_0Read 5 October 2026

HD 5001Maker spec sheet (PDF)gzhls.at/blob/ldb/2/9/c/b/88e1c5f7d6f57d4eddbdef407b2427546a53.pdfRead 23 October 2026Page 2 identifies HD 500 series.

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

ACPAEBT, 700176, 7001771Maker spec sheet (PDF)boulanger.scene7.com/is/content/Boulanger/4260752330596_f_0Read 5 October 2026Manual regulatory ACPAEBT plus exact Black SKU 700176 and White SKU 700177 in maker sheet. Current public shop SKU rows match.2Maker product pagesupport.sennheiser-hearing.com/hc/en-gb/articles/37817890197021-ACCENTUM-Plus-Wireless-SpecificationsRead 5 October 2026Current exact table Black 700176 and White 700177.

HD 550, 7004551Maker spec sheet (PDF)gzhls.at/blob/ldb/2/9/c/b/88e1c5f7d6f57d4eddbdef407b2427546a53.pdfRead 23 October 2026

GTIN / EAN

4260752330596, 810091270592, 4260752330619, 8100912706151Maker spec sheet (PDF)boulanger.scene7.com/is/content/Boulanger/4260752330596_f_0Read 5 October 2026Sheet directly maps Black EAN 4260752330596 / UPC 810091270592, White EAN 4260752330619 / UPC 810091270615. Current maker shop UPC rows match.

4260752333498, 8100912735861Maker spec sheet (PDF)gzhls.at/blob/ldb/2/9/c/b/88e1c5f7d6f57d4eddbdef407b2427546a53.pdfRead 23 October 2026Page 3 Technical Data. Maker V02 EN, February 17 2025, mirrored by Geizhals.

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

8 January 20247Press releasecdn.uc.assets.prezly.com/766165b6-91b2-4e80-8678-9a65abaa2fec/-/inline/no/Sennheiser%20CES%202024%20press%20release%20FINAL_EN.pdfRead 5 October 2026Full four-page maker CES announcement dated January 8, 2024 explicitly names new ACCENTUM Plus. February 20 availability is future wording in this announcement, independently verified as actual retail below.

19 March 20252Press releasecdn.uc.assets.prezly.com/125ff0a6-9592-4c48-be8d-28f7b3273ca5/-/inline/no/Press_Release_Sennheiser_HD_550_EN.pdfRead 23 October 2026

Status

Available4Maker product pageus.sennheiser-hearing.com/products/accentum-plusRead 5 October 2026Both exact Black 700176 and White 700177 current public maker variants available true. Current selling prices are not launch prices.

Available3Maker product pageus.sennheiser-hearing.com/products/hd-550Read 23 October 2026

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.

$229.956Press releasecdn.uc.assets.prezly.com/df2c1fe4-a324-494e-87f6-f50b157cf1b0/-/inline/no/Sennheiser%20ACCENTUM%20Plus_AVAILABILITY_FINAL_EN.pdfRead 5 October 2026Full four-page maker US retail-launch release February 20, 2024 states MSRP 229.95 USD. Before local sales tax. Canadian amount and EUR without proven VAT scope not stored. Current SoundGuys commerce widget MSRP 249.95 is not original launch amount.

$299.952Press releasecdn.uc.assets.prezly.com/125ff0a6-9592-4c48-be8d-28f7b3273ca5/-/inline/no/Press_Release_Sennheiser_HD_550_EN.pdfRead 23 October 2026Page 3 launch MSRP $299.95 USD before tax.

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

€299.92Press releasecdn.uc.assets.prezly.com/125ff0a6-9592-4c48-be8d-28f7b3273ca5/-/inline/no/Press_Release_Sennheiser_HD_550_EN.pdfRead 23 October 2026Page 3 launch MSRP EUR 299.90, including VAT as published.

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

US6Press releasecdn.uc.assets.prezly.com/df2c1fe4-a324-494e-87f6-f50b157cf1b0/-/inline/no/Sennheiser%20ACCENTUM%20Plus_AVAILABILITY_FINAL_EN.pdfRead 5 October 2026

Not available

ColoursiThe maker's own colour names

Black, White1Maker spec sheet (PDF)boulanger.scene7.com/is/content/Boulanger/4260752330596_f_0Read 5 October 2026

Black7Reviewtechradar.com/gaming/sennheiser-hd-550-reviewRead 23 October 2026Design describes black finish.

Segment

Music6Press releasecdn.uc.assets.prezly.com/df2c1fe4-a324-494e-87f6-f50b157cf1b0/-/inline/no/Sennheiser%20ACCENTUM%20Plus_AVAILABILITY_FINAL_EN.pdfRead 5 October 2026Maker release describes music listening and consumer travel use.

Music3Maker product pageus.sennheiser-hearing.com/products/hd-550Read 23 October 2026Maker categorizes these as audiophile headphones for critical music listening.

Design

2 of 7 differ

Form factor

Over-ear1Maker spec sheet (PDF)boulanger.scene7.com/is/content/Boulanger/4260752330596_f_0Read 5 October 2026

Over-ear4Maker spec sheet (PDF)gzhls.at/blob/ldb/2/9/c/b/88e1c5f7d6f57d4eddbdef407b2427546a53.pdfRead 23 October 2026Page 3 technical specifications: wired headband, over-ear circumaural, open-back.

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

Closed3Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/accentum-plus-wireless/Instruction%20manual%20ACCENTUM%20Plus/Instruction_manual_ACCENTUM_Plus.pdfRead 5 October 2026

Open4Maker spec sheet (PDF)gzhls.at/blob/ldb/2/9/c/b/88e1c5f7d6f57d4eddbdef407b2427546a53.pdfRead 23 October 2026

Wearing style

Headband1Maker spec sheet (PDF)boulanger.scene7.com/is/content/Boulanger/4260752330596_f_0Read 5 October 2026

Headband4Maker spec sheet (PDF)gzhls.at/blob/ldb/2/9/c/b/88e1c5f7d6f57d4eddbdef407b2427546a53.pdfRead 23 October 2026

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

Flat4Maker product pageus.sennheiser-hearing.com/products/accentum-plusRead 5 October 2026Maker explicitly fold-flat design and freely swiveling hinges. Manual page 29 case diagram and launch release agree. No inward folding asserted.

None11Measurementdiyaudioheaven.wordpress.com/measurements/brands-s-se/hd550Read 23 October 2026Specifications explicitly says collapsible No.

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

Yes4Maker product pageus.sennheiser-hearing.com/products/accentum-plusRead 5 October 2026

Yes11Measurementdiyaudioheaven.wordpress.com/measurements/brands-s-se/hd550Read 23 October 2026Build description distinguishes sideways swivel from limited vertical tilt.

RGB lighting

Not available

Not available

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

Not available

Not available

Drivers and sound

10 of 20 differ

Driver type

Dynamic1Maker spec sheet (PDF)boulanger.scene7.com/is/content/Boulanger/4260752330596_f_0Read 5 October 2026

Dynamic5Maker spec sheet (PDF)gzhls.at/blob/ldb/2/9/c/b/88e1c5f7d6f57d4eddbdef407b2427546a53.pdfRead 23 October 2026

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

37mm1Maker spec sheet (PDF)boulanger.scene7.com/is/content/Boulanger/4260752330596_f_0Read 5 October 2026

38mm6Press releasecdn.uc.assets.prezly.com/125ff0a6-9592-4c48-be8d-28f7b3273ca5/-/inline/no/Press_Release_Sennheiser_HD_550_EN.pdfRead 23 October 2026Page 1 custom 38 mm transducer.

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

Not available

Not available

Diaphragm material

Not available

Laminate plastic foil7Reviewtechradar.com/gaming/sennheiser-hd-550-reviewRead 23 October 2026Design and features quotes maker on diaphragm construction.

Magnet

Not available

Not available

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

Min10 HzMax22 kHz1Maker spec sheet (PDF)boulanger.scene7.com/is/content/Boulanger/4260752330596_f_0Read 5 October 2026Manual page 34 gives the same 10 Hz-22 kHz acoustic range at -10 dB. No wireless transport bandwidth is inferred.

Min6 HzMax39.5 kHz5Maker spec sheet (PDF)gzhls.at/blob/ldb/2/9/c/b/88e1c5f7d6f57d4eddbdef407b2427546a53.pdfRead 23 October 2026

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.

95Ω1Maker spec sheet (PDF)boulanger.scene7.com/is/content/Boulanger/4260752330596_f_0Read 5 October 2026Passive impedance 95 ohms. Powered active impedance 560 ohms is separately stated and not substituted.

150Ω5Maker spec sheet (PDF)gzhls.at/blob/ldb/2/9/c/b/88e1c5f7d6f57d4eddbdef407b2427546a53.pdfRead 23 October 2026

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.

106dB1Maker spec sheet (PDF)boulanger.scene7.com/is/content/Boulanger/4260752330596_f_0Read 5 October 2026Maker SPL 106 dB at 1 kHz / 0 dBFS. Not a per-1-mW or per-1-V sensitivity, so sensitivity_reference omitted.

106.7dB5Maker spec sheet (PDF)gzhls.at/blob/ldb/2/9/c/b/88e1c5f7d6f57d4eddbdef407b2427546a53.pdfRead 23 October 2026Page 3: 106.7 dB SPL at 1 kHz / 1 Vrms.

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

Not available

Per 1 V5Maker spec sheet (PDF)gzhls.at/blob/ldb/2/9/c/b/88e1c5f7d6f57d4eddbdef407b2427546a53.pdfRead 23 October 2026

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

0.3%1Maker spec sheet (PDF)boulanger.scene7.com/is/content/Boulanger/4260752330596_f_0Read 5 October 2026Advertised upper bound strictly below 0.3 percent at 1 kHz / 100 dB SPL. Stored 0.3 is the published ceiling, not a measured value.

0.2%5Maker spec sheet (PDF)gzhls.at/blob/ldb/2/9/c/b/88e1c5f7d6f57d4eddbdef407b2427546a53.pdfRead 23 October 2026Page 3: less than 0.2% at 1 kHz / 90 dB SPL. Stored upper bound.

Max input power

Not available

Not available

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

Not available

Not available

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

Not available

Not available

DAC

Not available

Not available

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

Not available

Not available

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

Yes3Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/accentum-plus-wireless/Instruction%20manual%20ACCENTUM%20Plus/Instruction_manual_ACCENTUM_Plus.pdfRead 5 October 2026Page 26 explicitly sound effects are stored in headphones and remain active without Smart Control app on a different Bluetooth source.

No12Maker product pageus.sennheiser-hearing.com/products/hd-550Read 23 October 2026Maker explicitly describes a direct analog signal path with no electronics. No powered noise cancellation, digital USB audio or stored electronic equalizer.

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

51Maker spec sheet (PDF)boulanger.scene7.com/is/content/Boulanger/4260752330596_f_0Read 5 October 2026

Not available

EQ presets

Bass Boost, Podcast1Maker spec sheet (PDF)boulanger.scene7.com/is/content/Boulanger/4260752330596_f_0Read 5 October 2026Maker sheet explicitly Bass Boost and Podcast sound modes. Both are independently demonstrated as EQ presets in SoundGuys review. Other preset names not stated are not guessed.

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

7 of 10 differ

Active noise cancelling

Yes1Maker spec sheet (PDF)boulanger.scene7.com/is/content/Boulanger/4260752330596_f_0Read 5 October 2026

No12Maker product pageus.sennheiser-hearing.com/products/hd-550Read 23 October 2026Maker explicitly describes a direct analog signal path with no electronics. No powered noise cancellation, digital USB audio or stored electronic equalizer.

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

Hybrid1Maker spec sheet (PDF)boulanger.scene7.com/is/content/Boulanger/4260752330596_f_0Read 5 October 2026

Not available

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

43Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/accentum-plus-wireless/Instruction%20manual%20ACCENTUM%20Plus/Instruction_manual_ACCENTUM_Plus.pdfRead 5 October 2026Page 7 expressly two ANC microphones directed outward and two inward. Four physical ANC microphones, not four voice microphones.

Not available

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

Yes1Maker spec sheet (PDF)boulanger.scene7.com/is/content/Boulanger/4260752330596_f_0Read 5 October 2026

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

Yes1Maker spec sheet (PDF)boulanger.scene7.com/is/content/Boulanger/4260752330596_f_0Read 5 October 2026

Not available

Adjustable transparency

Yes3Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/accentum-plus-wireless/Instruction%20manual%20ACCENTUM%20Plus/Instruction_manual_ACCENTUM_Plus.pdfRead 5 October 2026Page 21 transparency and ANC intensity remain incrementally adjustable in app. Numerical level count not stated.

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

Yes3Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/accentum-plus-wireless/Instruction%20manual%20ACCENTUM%20Plus/Instruction_manual_ACCENTUM_Plus.pdfRead 5 October 2026Page 22 exact selectable Off, Auto and Max wind-reduction modes. These are not ANC level counts.

Not available

Measured

5 of 21 differ

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

The measured response follows the reviewer preference curve closely in bass and mids, with a narrow emphasis near 5-6 kHz.5Reviewsoundguys.com/sennheiser-accentum-plus-review-110432Read 5 October 2026Same exact unit and firmware, Objective Measurements text. No plotted numeric points, target curve deviation or review scores converted to dB.

Bass rolls off gently below 25 Hz. The response stays within 3 dB from 25 Hz to 2 kHz. Treble has a peak near 13 kHz.11Measurementdiyaudioheaven.wordpress.com/measurements/brands-s-se/hd550Read 23 October 2026Flatbed rig with good seal, no smoothing. Reviewer applies microphone and low-frequency correction. Measurements published July 11 2025. Actual fit can differ.

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

The standardized call samples show wind-rejection problems. The reviewer finds the microphones adequate for indoor office calls.5Reviewsoundguys.com/sennheiser-accentum-plus-review-110432Read 5 October 2026Same unit and firmware, standardized ideal, office, street, windy and reverberant samples. No numerical microphone bandwidth inferred from audio.

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.

ASennheiser ACCENTUM Plus Wireless

Connection	ANC	Hours (h)
Bluetooth	Yes	53.25

Source5Reviewsoundguys.com/sennheiser-accentum-plus-review-110432Read 5 October 2026Provided unit tested three days, firmware 3.14.9, Smart Control 4.7.0. Looped standardized music peaking 75 dB SPL lasted 53 h 15 min with ANC on. Codec not named. 53.25 h actual test, distinct from 50 h maker claim.

BSennheiser HD 550

Not available

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

53.25h=CalculatedFrom Measured battery life

Not available

Clamping forceiMeasured by a reviewer, not claimed by the maker

Not available

Not available

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

Not available

238g(8.4 oz)11Measurementdiyaudioheaven.wordpress.com/measurements/brands-s-se/hd550Read 23 October 2026Measured specimen 238 g excluding cable. Maker claim stays 237 g.

Microphone

8 of 16 differ

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

Built-in1Maker spec sheet (PDF)boulanger.scene7.com/is/content/Boulanger/4260752330596_f_0Read 5 October 2026

None7Reviewtechradar.com/gaming/sennheiser-hd-550-reviewRead 23 October 2026Base headphone has no microphone. Optional boom arm is excluded.

Microphone element

MEMS1Maker spec sheet (PDF)boulanger.scene7.com/is/content/Boulanger/4260752330596_f_0Read 5 October 2026

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.

21Maker spec sheet (PDF)boulanger.scene7.com/is/content/Boulanger/4260752330596_f_0Read 5 October 2026Exact sheet says two beamforming speech microphones, corroborated manual page 6 device diagram and current maker support specification. Manual page 34 incorrectly lists four voice microphones in a 2x2 array, conflicting with those exact sources. Retain two, distinct from four ANC microphones.2Maker product pagesupport.sennheiser-hearing.com/hc/en-gb/articles/37817890197021-ACCENTUM-Plus-Wireless-SpecificationsRead 5 October 2026Current exact maker table explicitly two mics, beamforming for noise reduction, corroborating sheet and manual device diagram.

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.

Min50Max8,000Hz1Maker spec sheet (PDF)boulanger.scene7.com/is/content/Boulanger/4260752330596_f_0Read 5 October 202650 Hz-8 kHz, confirmed manual page 34 at -3 dB.

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

Yes3Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/accentum-plus-wireless/Instruction%20manual%20ACCENTUM%20Plus/Instruction_manual_ACCENTUM_Plus.pdfRead 5 October 2026Page 24 multifunction button once toggles microphone during call. This is a shared physical button, not separate dedicated mute hardware.

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.

Voice prompt3Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/accentum-plus-wireless/Instruction%20manual%20ACCENTUM%20Plus/Instruction_manual_ACCENTUM_Plus.pdfRead 5 October 2026Page 24 explicit Mute on / Mute off voice prompts. No mic-mute LED inferred from generic power LED.

Not available

Sidetone

Yes3Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/accentum-plus-wireless/Instruction%20manual%20ACCENTUM%20Plus/Instruction_manual_ACCENTUM_Plus.pdfRead 5 October 2026

Not available

Adjustable sidetone

Yes3Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/accentum-plus-wireless/Instruction%20manual%20ACCENTUM%20Plus/Instruction_manual_ACCENTUM_Plus.pdfRead 5 October 2026Page 25 own voice playback controlled with app slider, can also be 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, Bluetooth3Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/accentum-plus-wireless/Instruction%20manual%20ACCENTUM%20Plus/Instruction_manual_ACCENTUM_Plus.pdfRead 5 October 2026

Analog8Reviewsoundguys.com/sennheiser-hd-550-review-134419Read 23 October 2026

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

3.5 mm TRS5Reviewsoundguys.com/sennheiser-accentum-plus-review-110432Read 5 October 2026Review explicitly included TRS analog cable and 2.5 mm TRS headset socket. Maker sheet confirms 3.5 mm source plug / 2.5 mm headset plug.

3.5 mm TRS, 6.35 mm8Reviewsoundguys.com/sennheiser-hd-550-review-134419Read 23 October 2026

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

2.5 mm3Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/accentum-plus-wireless/Instruction%20manual%20ACCENTUM%20Plus/Instruction_manual_ACCENTUM_Plus.pdfRead 5 October 2026

2.5 mm8Reviewsoundguys.com/sennheiser-hd-550-review-134419Read 23 October 2026Connectivity section explicitly identifies 2.5 mm locking headset end and 3.5 mm TRS source end.

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

1.2m3Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/accentum-plus-wireless/Instruction%20manual%20ACCENTUM%20Plus/Instruction_manual_ACCENTUM_Plus.pdfRead 5 October 2026

1.8m9Maker spec sheet (PDF)gzhls.at/blob/ldb/2/9/c/b/88e1c5f7d6f57d4eddbdef407b2427546a53.pdfRead 23 October 2026

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

USB-C3Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/accentum-plus-wireless/Instruction%20manual%20ACCENTUM%20Plus/Instruction_manual_ACCENTUM_Plus.pdfRead 5 October 2026

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.

Yes3Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/accentum-plus-wireless/Instruction%20manual%20ACCENTUM%20Plus/Instruction_manual_ACCENTUM_Plus.pdfRead 5 October 2026Page 29 explicitly USB audio playback and microphone recording on Mac/PC/mobile device, unlike analog mode. Bluetooth connections should be disconnected first.

No12Maker product pageus.sennheiser-hearing.com/products/hd-550Read 23 October 2026Maker explicitly describes a direct analog signal path with no electronics. No powered noise cancellation, digital USB audio or stored electronic equalizer.

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.

Yes3Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/accentum-plus-wireless/Instruction%20manual%20ACCENTUM%20Plus/Instruction_manual_ACCENTUM_Plus.pdfRead 5 October 2026Page 28 specifically analog listening when battery is empty. Bluetooth deactivates with analog cable, ANC needs battery, music/call/assistant controls unavailable.

Yes3Maker product pageus.sennheiser-hearing.com/products/hd-550Read 23 October 2026Direct analog signal path with no electronics and no charging or pairing.

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

Not available

Not available

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

Not available

Not available

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

Not available

Not available

Bluetooth

5.21Maker spec sheet (PDF)boulanger.scene7.com/is/content/Boulanger/4260752330596_f_0Read 5 October 2026

Not available

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

SBC, AAC, aptX, aptX Adaptive1Maker spec sheet (PDF)boulanger.scene7.com/is/content/Boulanger/4260752330596_f_0Read 5 October 2026Exact sheet and current maker support list classic aptX as well as aptX Adaptive, AAC and SBC. Call codecs mSBC/CVSD are not stored as music codecs. Bluetooth LE identification does not prove LE Audio or LC3.2Maker product pagesupport.sennheiser-hearing.com/hc/en-gb/articles/37817890197021-ACCENTUM-Plus-Wireless-SpecificationsRead 5 October 2026Current exact table explicitly SBC, AAC, aptX and aptX Adaptive for music.

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.

Yes3Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/accentum-plus-wireless/Instruction%20manual%20ACCENTUM%20Plus/Instruction_manual_ACCENTUM_Plus.pdfRead 5 October 2026Page 13 two active Bluetooth devices, one audio source at a time.

Not available

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

23Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/accentum-plus-wireless/Instruction%20manual%20ACCENTUM%20Plus/Instruction_manual_ACCENTUM_Plus.pdfRead 5 October 2026

Not available

Paired devices remembered

63Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/accentum-plus-wireless/Instruction%20manual%20ACCENTUM%20Plus/Instruction_manual_ACCENTUM_Plus.pdfRead 5 October 2026Page 13 stores up to six paired devices, seventh overwrites least-used profile. This is not six simultaneous connections.

Not available

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

Not available

Not available

Fast pairing

Not available

Not available

Base station

Not available

Not available

Latency

None of 2 known

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

Not available

Not available

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

Not available

Not available

Compatibility

2 of 3 differ

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

Windows, macOS, Android, iOS3Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/accentum-plus-wireless/Instruction%20manual%20ACCENTUM%20Plus/Instruction_manual_ACCENTUM_Plus.pdfRead 5 October 20265Reviewsoundguys.com/sennheiser-accentum-plus-review-110432Read 5 October 2026Exact FAQ explicitly compatibility with Android and iPhone. Desktop Mac/PC USB routes are documented in full manual page 29.

PS5, PS4, Xbox Series X|S, Xbox One, Nintendo Switch7Reviewtechradar.com/gaming/sennheiser-hd-550-reviewRead 23 October 2026Comparison table explicitly lists these platforms. PC stored as Windows, corroborated by wired PC review. Mobile lacks named OS and is omitted.

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.

ASennheiser ACCENTUM Plus Wireless

Platform	Connection
Windows	USB
macOS	USB
Android	Bluetooth
iOS	Bluetooth

Source3Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/accentum-plus-wireless/Instruction%20manual%20ACCENTUM%20Plus/Instruction_manual_ACCENTUM_Plus.pdfRead 5 October 2026Page 29 explicitly USB playback/recording Mac and PC. Exact SoundGuys FAQ independently confirms Android/iPhone Bluetooth compatibility. Generic mobile USB text does not establish every Android or iOS USB route.5Reviewsoundguys.com/sennheiser-accentum-plus-review-110432Read 5 October 2026

BSennheiser HD 550

Not available

Official licence

Not available

Not available

Battery and charging

10 of 13 differ

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

800mAh1Maker spec sheet (PDF)boulanger.scene7.com/is/content/Boulanger/4260752330596_f_0Read 5 October 2026Sheet page 3 gives two alternative battery suppliers, each one physical cell of 800 mAh at 3.7 V, 2.96 Wh or rounded 3.0 Wh. 0.8 Ah x 3.7 V = 2.96 Wh. Current maker support agrees 800 mAh. Manual page 34 incorrectly puts 5 V USB input, 700 mAh and 2.96 Wh into one battery row, inconsistent with each other. That summary row is not used.2Maker product pagesupport.sennheiser-hearing.com/hc/en-gb/articles/37817890197021-ACCENTUM-Plus-Wireless-SpecificationsRead 5 October 2026Current exact maker support specification updated August 8, 2026 explicitly 800 mAh, matching full maker sheet rather than inconsistent manual summary.

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.

11Maker spec sheet (PDF)boulanger.scene7.com/is/content/Boulanger/4260752330596_f_0Read 5 October 2026Sheet page 3 gives one cell installed and none outside product for each alternative supplier. Alternatives are not two simultaneously installed cells.

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.

ASennheiser ACCENTUM Plus Wireless

Connection	ANC	Hours (h)
Bluetooth	Yes	50

Source1Maker spec sheet (PDF)boulanger.scene7.com/is/content/Boulanger/4260752330596_f_0Read 5 October 2026Up to 50 hours music via Bluetooth with ANC on, iPhone at medium volume. Codec not named. No separate ANC-off claim inferred.

BSennheiser HD 550

Not available

Battery life (claimed, max)

50h=CalculatedFrom Claimed battery life

Not available

Battery life with ANC (claimed)

50h=CalculatedFrom Claimed battery life

Not available

Battery life without ANC (claimed)

Not available

Not available

Charging port

USB-C1Maker spec sheet (PDF)boulanger.scene7.com/is/content/Boulanger/4260752330596_f_0Read 5 October 2026

Not available

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

210min1Maker spec sheet (PDF)boulanger.scene7.com/is/content/Boulanger/4260752330596_f_0Read 5 October 20263Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/accentum-plus-wireless/Instruction%20manual%20ACCENTUM%20Plus/Instruction_manual_ACCENTUM_Plus.pdfRead 5 October 2026Page 11 explicitly complete charging cycle about 3.5 hours, corroborating specification sheet.

Not available

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

10min1Maker spec sheet (PDF)boulanger.scene7.com/is/content/Boulanger/4260752330596_f_0Read 5 October 2026

Not available

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

5h1Maker spec sheet (PDF)boulanger.scene7.com/is/content/Boulanger/4260752330596_f_0Read 5 October 2026Sheet explicitly 10 minutes charging for up to 5 hours music, also manual page 11 diagram. ANC state and codec not specified for quick charge.

Not available

Use while charging

Yes3Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/accentum-plus-wireless/Instruction%20manual%20ACCENTUM%20Plus/Instruction_manual_ACCENTUM_Plus.pdfRead 5 October 2026Page 11 expressly can listen to music or make calls while charging, potentially increasing charge time. USB mode charges simultaneously on page 29.

Not available

Charging dock or stand

Not available

Not available

Controls

4 of 6 differ

Controls

Buttons, Touch3Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/accentum-plus-wireless/Instruction%20manual%20ACCENTUM%20Plus/Instruction_manual_ACCENTUM_Plus.pdfRead 5 October 2026

Not available

Volume control

Touch3Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/accentum-plus-wireless/Instruction%20manual%20ACCENTUM%20Plus/Instruction_manual_ACCENTUM_Plus.pdfRead 5 October 2026

None7Reviewtechradar.com/gaming/sennheiser-hd-550-reviewRead 23 October 2026No onboard controls or volume dial.

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

Yes3Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/accentum-plus-wireless/Instruction%20manual%20ACCENTUM%20Plus/Instruction_manual_ACCENTUM_Plus.pdfRead 5 October 2026Page 26 Smart Pause sensor pauses/resumes music, accepts calls on wearing and mutes/resumes calls on removal/replacement.

Not available

Voice assistant

Siri, Google Assistant3Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/accentum-plus-wireless/Instruction%20manual%20ACCENTUM%20Plus/Instruction_manual_ACCENTUM_Plus.pdfRead 5 October 2026Page 25 explicitly connected device Siri or Google Assistant via multifunction button, using Bluetooth or USB. Smartphone/software compatibility applies. No built-in always-listening assistant license assumed.

Not available

Comfort and build

6 of 11 differ

Headband type

Padded4Maker product pageus.sennheiser-hearing.com/products/accentum-plusRead 5 October 2026

Padded7Reviewtechradar.com/gaming/sennheiser-hd-550-reviewRead 23 October 2026

Headband material

Silicone lining4Maker product pageus.sennheiser-hearing.com/products/accentum-plusRead 5 October 2026Exact maker description says soft touch silicone-lined headband. This describes the lining, not the structural core.

Synthetic leather3Maker product pageus.sennheiser-hearing.com/products/hd-550Read 23 October 2026

Frame material

Plastic yokes5Reviewsoundguys.com/sennheiser-accentum-plus-review-110432Read 5 October 2026Review explicitly yokes are plastic. Structural scope is the yokes, not a guess from generic mostly-plastic wording.

Plastic8Reviewsoundguys.com/sennheiser-hd-550-review-134419Read 23 October 2026Design describes plastic exterior and chassis.

Ear cup material

Not available

Steel mesh covers3Maker product pageus.sennheiser-hearing.com/products/hd-550Read 23 October 2026Maker names steel covers. Entire cup construction is not claimed to be steel.

Ear pad material

Leather-like covering5Reviewsoundguys.com/sennheiser-accentum-plus-review-110432Read 5 October 2026Review explicitly leather-like cushions. Real animal leather not asserted.

Synthetic velour9Maker spec sheet (PDF)gzhls.at/blob/ldb/2/9/c/b/88e1c5f7d6f57d4eddbdef407b2427546a53.pdfRead 23 October 2026

Replaceable ear pads

Yes3Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/accentum-plus-wireless/Instruction%20manual%20ACCENTUM%20Plus/Instruction_manual_ACCENTUM_Plus.pdfRead 5 October 2026Page 30 explicitly instructions to remove/replace pads, press into earcup notch. No clip/twist/magnetic attachment enum guessed from generic notch.

Yes9Maker spec sheet (PDF)gzhls.at/blob/ldb/2/9/c/b/88e1c5f7d6f57d4eddbdef407b2427546a53.pdfRead 23 October 2026

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

Not available

Not available

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

Width42Height71mm(1.7 × 2.8 in)11Measurementdiyaudioheaven.wordpress.com/measurements/brands-s-se/hd550Read 23 October 2026Specifications explicitly names inner pad width 42 mm and height 71 mm. Front/rear depth differs, so a single depth is omitted. SoundGuys labels 43 x 75 mm as ear cup dimensions without saying usable opening.

Ear tips included

Not available

Not available

Dust and water rating

Not available

Not available

User-replaceable parts

Ear pads3Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/accentum-plus-wireless/Instruction%20manual%20ACCENTUM%20Plus/Instruction_manual_ACCENTUM_Plus.pdfRead 5 October 2026

Ear pads, Audio cable9Maker spec sheet (PDF)gzhls.at/blob/ldb/2/9/c/b/88e1c5f7d6f57d4eddbdef407b2427546a53.pdfRead 23 October 2026Page 3 lists replacement cable and ear pads.

Software

3 of 3 differ

Companion app

Sennheiser Smart Control1Maker spec sheet (PDF)boulanger.scene7.com/is/content/Boulanger/4260752330596_f_0Read 5 October 2026

Not available

App platforms

Android, iOS1Maker spec sheet (PDF)boulanger.scene7.com/is/content/Boulanger/4260752330596_f_0Read 5 October 2026

Not available

User firmware updates

Yes3Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/accentum-plus-wireless/Instruction%20manual%20ACCENTUM%20Plus/Instruction_manual_ACCENTUM_Plus.pdfRead 5 October 2026

Not available

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.

227g(8 oz)1Maker spec sheet (PDF)boulanger.scene7.com/is/content/Boulanger/4260752330596_f_0Read 5 October 2026Approximately 227 g device only, not 582 g packaged weight or 6520 g master carton.

237g(8.4 oz)9Maker spec sheet (PDF)gzhls.at/blob/ldb/2/9/c/b/88e1c5f7d6f57d4eddbdef407b2427546a53.pdfRead 23 October 2026Page 3 explicitly excludes cable.

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.

Width165Height195Depth48mm(6.5 × 7.7 × 1.9 in)1Maker spec sheet (PDF)boulanger.scene7.com/is/content/Boulanger/4260752330596_f_0Read 5 October 2026Sheet page 3 explicitly 165 x 195 x 48 mm folded flat. Current support reproduces 16.5 x 19.5 x 4.8 without unit, and SoundGuys depth 480 mm is a transcription error. Use exact maker millimetre table.2Maker product pagesupport.sennheiser-hearing.com/hc/en-gb/articles/37817890197021-ACCENTUM-Plus-Wireless-SpecificationsRead 5 October 2026Current table labels folded-flat dimensions but omits the centimetre unit. Exact millimetre dimensions come from the full maker sheet.

Not available

Certifications

None of 3 known

Hi-Res Audio

Not available

Not available

Communication certifications

Not available

Not available

FCC ID

Not available

Not available

Other certifications

Not available

Not available

In the box

2 of 3 differ

In the box

Sennheiser ACCENTUM Plus headphones, USB-A to USB-C cable, 3.5 mm to 2.5 mm audio cable, Carry case, Quick guide, Safety guide, Compliance sheet3Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/accentum-plus-wireless/Instruction%20manual%20ACCENTUM%20Plus/Instruction_manual_ACCENTUM_Plus.pdfRead 5 October 2026Page 5 complete exact list, USB A to C cable, analog 3.5 mm stereo plug approx. 1.2 m, case and three documents. No airline adapter included.

HD 550 headphones, 1.80 m cable with 3.5 mm jack plug, 3.5 to 6.35 mm screw-on jack adapter, Drawstring bag, Safety guide9Maker spec sheet (PDF)gzhls.at/blob/ldb/2/9/c/b/88e1c5f7d6f57d4eddbdef407b2427546a53.pdfRead 23 October 2026Page 3 complete box contents.

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

ASennheiser ACCENTUM Plus Wireless

Type	Length (m)	Count
USB-A to USB-C cable	Not available	1
3.5 mm to 2.5 mm stereo audio cable	1.2	1

Source3Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/accentum-plus-wireless/Instruction%20manual%20ACCENTUM%20Plus/Instruction_manual_ACCENTUM_Plus.pdfRead 5 October 2026

BSennheiser HD 550

Type	Length (m)	Count
2.5 mm locking headset plug to 3.5 mm stereo plug	1.8	1

Source9Maker spec sheet (PDF)gzhls.at/blob/ldb/2/9/c/b/88e1c5f7d6f57d4eddbdef407b2427546a53.pdfRead 23 October 2026

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

Soft5Reviewsoundguys.com/sennheiser-accentum-plus-review-110432Read 5 October 2026Review explicitly says soft-shell case. Maker packaging Hard box is the retail carton, not a hard carry case.

Soft9Maker spec sheet (PDF)gzhls.at/blob/ldb/2/9/c/b/88e1c5f7d6f57d4eddbdef407b2427546a53.pdfRead 23 October 2026

Links

Not compared

Product page

us.sennheiser-hearing.com/products/accentum-plus4Maker product pageus.sennheiser-hearing.com/products/accentum-plusRead 5 October 2026Exact current maker product public JSON https://us.sennheiser-hearing.com/products/accentum-plus.js directly opened including product description, image array and SKU cells. Wrong /accentum-plus-wireless handle returns 404 and is not used.

us.sennheiser-hearing.com/products/hd-5503Maker product pageus.sennheiser-hearing.com/products/hd-550Read 23 October 2026

Spec sheet

boulanger.scene7.com/is/content/Boulanger/4260752330596_f_01Maker spec sheet (PDF)boulanger.scene7.com/is/content/Boulanger/4260752330596_f_0Read 5 October 2026Full three-page maker specification sheet hosted by retailer Boulanger, dated 09/23. Technical and battery tables pages 2-3 opened and visually checked. Packaging and master-carton figures are not product dimensions or weight.

gzhls.at/blob/ldb/2/9/c/b/88e1c5f7d6f57d4eddbdef407b2427546a53.pdf1Maker spec sheet (PDF)gzhls.at/blob/ldb/2/9/c/b/88e1c5f7d6f57d4eddbdef407b2427546a53.pdfRead 23 October 2026

Manual

cdn.sennheiser-hearing.com/product-documents/product-downloads/accentum-plus-wireless/Instruction%20manual%20ACCENTUM%20Plus/Instruction_manual_ACCENTUM_Plus.pdf3Owner's manualcdn.sennheiser-hearing.com/product-documents/product-downloads/accentum-plus-wireless/Instruction%20manual%20ACCENTUM%20Plus/Instruction_manual_ACCENTUM_Plus.pdfRead 5 October 2026Full 36-page official English manual version 08/25 A02 directly opened. Source conflicts in page 34 battery and speech-mic summary are explicitly resolved against full maker sheet and current support table. Page 35 warranty says 12 months, then generic most products 2-year wording. Warranty omitted pending exact market conditions.

www.richersounds.com/content/product_files/HD550.pdf10Owner's manualrichersounds.com/content/product_files/HD550.pdfRead 23 October 2026Maker safety guide HD 505 / HD 550 with connection, headband adjustment and ear pad replacement illustrations. Retailer mirror because current maker Download article is empty.

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.

Not available

2years3Maker product pageus.sennheiser-hearing.com/products/hd-550Read 23 October 2026US maker page includes a 2-year manufacturer warranty.

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