HEADPHONES · YOUR NEXT FACE-OFF

Sennheiser HD 820 vs Beyerdynamic AVENTHO Y

Real specs. Clear sources.Exact models · UK & US buying links

Compared products

YOUR FIRST CHOICE

Sennheiser HD 820

507435 · Black · wired, with 6.35 mm and 4.4 mm cables

Full product profile Official image

Exact model & source notes

The HD 820 (article 507435) is Sennheiser's reference-class closed-back audiophile headphone, with a 56 mm Ring Radiator dynamic transducer behind concave Gorilla Glass reflectors, 300-ohm impedance, a rated 360 g without cable, and both 6.35 mm unbalanced and 4.4 mm balanced cables in the box.

Specifications checked 26 Sept 2026.

Amazon links open search results. Check the exact variant, current price and availability with the retailer.

Manufacturer specifications

WHAT DIFFERS

56 mmDriver size45 mm

360 gWeight316 g

2 of 6 verified differences, in the order listed below. Not a rating.

See the 6 verified differences

THE CONTENDER

Beyerdynamic AVENTHO Y

1002671 · Liquid Black · wireless ANC over-ear

Full product profile Official image

Exact model & source notes

The AVENTHO Y (article 1002671, Liquid Black) is beyerdynamic's foldable, closed-back wireless over-ear headphone with active noise cancellation and a transparency mode. It has a 45 mm dynamic driver, Bluetooth 6.0 with multipoint (SBC and AAC), two integrated ENC call microphones, a 5-band app equaliser and a user-replaceable battery rated at up to 90 hours without ANC and 60 hours with it. It weighs 316 g.

Specifications checked 27 Sept 2026.

Amazon links open search results. Check the exact variant, current price and availability with the retailer.

Manufacturer specifications

Sennheiser HD 820 UK & US retailers

UK & US price history: no verified listing yet

Beyerdynamic AVENTHO Y UK & US retailers

UK & US price history: no verified listing yet

Search links open retailer results, not a matched listing; eBay listings are checked daily. As an Amazon Associate I earn from qualifying purchases. As an eBay Partner, we may be compensated if you make a purchase.

THE DIFFERENCES, MADE VISIBLE

Visual facts

Differences first. Select a topic for its graphic, sources and conditions.

How to read this comparison

Manufacturer facts for the exact models shown. Not a quality rating or a test result.
“Different” means the known values differ, not that one is better.
Missing or conflicting evidence is marked and never counts as a difference. Source chips hold each fact’s sources and conditions.

FEATURES SIDE BY SIDE6 topics

Yes and No describe the listed feature. Missing evidence stays unverified.

SELECTED TOPIC

01 / 06

Open-back design

Open-back earcups are not sealed. Start here if your listening space is quiet; this construction is not a sound-quality rating.

Sennheiser HD 820: closed-back · illustration, not to scale

Beyerdynamic AVENTHO Y: closed-back · illustration, not to scale

Sennheiser HD 820No

Closed-back. Manufacturer specification

Source 1

Beyerdynamic AVENTHO YNo

Closed-back. Manufacturer specification

Source 1 Source 2

Choose your must-haves

Start with your listening environment. Open and closed earcups suit different surroundings. A closed back is not the same as active noise cancellation. Check the exact cable and headphone output. We do not turn impedance, driver size or unpaired lab results into a sound-quality score.

WHAT CHANGES BETWEEN THEM?

Key differences

Full specifications ↓

6 verified differences, most decision-relevant first. Missing information stays separate.

Wired / wireless connections

Sennheiser HD 820Wired analogue; detachable 3 m cables with 6.35 mm unbalanced plug (fitted) and 4.4 mm balanced plug, both supplied; XLR-4 balanced cable optional

Beyerdynamic AVENTHO YBluetooth 6.0 with multipoint; USB-C port (beyerdynamic lists the supplied USB-C to USB-C cable type as 'USB-C / audio cable')

Sources

Sennheiser HD 820

Manufacturer specification · Sennheiser's box list names only the 6.35 mm unbalanced and 4.4 mm balanced cables; no 3.5 mm plug or adapter is listed.

Sennheiser HD 820 — official UK product page and specifications Sennheiser UK store — HD 820 product variant data (SKU and EAN)

Beyerdynamic AVENTHO Y

Manufacturer specification · An optional upgrade package adds a USB-C dongle and boom microphone; it is not in the standard box.

beyerdynamic AVENTHO Y — global product page and technical data beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)

Check the exact configuration and source conditions for your use.

Driver construction

Sennheiser HD 82056 mm Ring Radiator dynamic transducer with concave Gorilla Glass reflectors

Beyerdynamic AVENTHO Y45 mm dynamic driver

Sources

Sennheiser HD 820

Manufacturer specification

Sennheiser HD 820 — official UK product page and specifications

Beyerdynamic AVENTHO Y

Manufacturer specification

beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)

Check whether the diameter describes the complete transducer or only its diaphragm. Different labels and driver sizes do not establish better sound.

Driver size

Sennheiser HD 82056 mm

Beyerdynamic AVENTHO Y45 mm

Sources

Sennheiser HD 820

Manufacturer specification

Sennheiser HD 820 — official UK product page and specifications

Beyerdynamic AVENTHO Y

Manufacturer specification

beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)

Check whether the diameter describes the complete transducer or only its diaphragm. Different labels and driver sizes do not establish better sound.

Rated frequency range

Sennheiser HD 82012–43,800 Hz (−3 dB); 6–48,000 Hz (−10 dB)

Beyerdynamic AVENTHO Y20–20,000 Hz

Sources

Sennheiser HD 820

Manufacturer specification

Sennheiser HD 820 — official UK product page and specifications Sennheiser UK store — HD 820 product variant data (SKU and EAN)

Beyerdynamic AVENTHO Y

Manufacturer specification

beyerdynamic AVENTHO Y — global product page and technical data beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)

Range endpoints need their stated threshold. They do not describe response flatness or prove better bass, detail or sound quality.

In the box

Sennheiser HD 820Headphones, cable with 6.35 mm unbalanced plug (fitted), cable with 4.4 mm balanced plug, instruction manual, storage box, microfibre cloth

Beyerdynamic AVENTHO YAVENTHO Y headphones, USB-C to USB-C charging cable, soft bag, quick start guide, compliance booklet

Sources

Sennheiser HD 820

Manufacturer specification

Sennheiser HD 820 — official UK product page and specifications

Beyerdynamic AVENTHO Y

Manufacturer specification

beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)

Check the exact configuration and source conditions for your use.

Weight

Sennheiser HD 820360 g

Beyerdynamic AVENTHO Y316 g

Sources

Sennheiser HD 820

Manufacturer specification · Without the connection cable, per Sennheiser's UK store data ('360 g without cable'); the product-page table gives 360 g.

Sennheiser HD 820 — official UK product page and specifications Sennheiser UK store — HD 820 product variant data (SKU and EAN)

Beyerdynamic AVENTHO Y

Manufacturer specification · The product pages state 316 g without cable; the specification sheet gives 316 g without stating the basis.

beyerdynamic AVENTHO Y — global product page and technical data beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)

A size or weight trade-off; it does not establish the better product.

Configuration & compatibility details (1)

Wearing style

Sennheiser HD 820Over-ear (circumaural), closed-back dynamic headphones

Beyerdynamic AVENTHO YOver-ear, closed-back foldable wireless headphones

Sources

Sennheiser HD 820

Manufacturer specification

Sennheiser HD 820 — official UK product page and specifications Sennheiser UK store — HD 820 product variant data (SKU and EAN)

Beyerdynamic AVENTHO Y

Manufacturer specification

beyerdynamic AVENTHO Y — global product page and technical data beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)

Both sources describe the same wearing style and acoustic design in different words. The extra wording does not establish a different fit; compare the separately listed fields.

Missing or non-comparable evidence (22)

Active noise cancellation

Sennheiser HD 820Not verified

Beyerdynamic AVENTHO YYes

Sources

Sennheiser HD 820

The reviewed exact sources do not explicitly establish active noise cancellation absence. Preserve separately sourced acoustic design and passive attenuation; they cannot turn omitted ANC into a false capability. · Manufacturer specification

Sennheiser HD 820 — official UK product page and specifications Sennheiser UK store — HD 820 product variant data (SKU and EAN)

Beyerdynamic AVENTHO Y

Manufacturer specification · No attenuation figure is published.

beyerdynamic AVENTHO Y — global product page and technical data beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Microphone

In Visual facts

Sennheiser HD 820Not verified

Beyerdynamic AVENTHO YYes

Sources

Sennheiser HD 820

The reviewed exact sources do not explicitly establish microphone absence. Omission from a package or technical inventory, a stereo audio connector, and a without-remote statement do not establish microphone=false. · Manufacturer specification

Sennheiser HD 820 — official UK product page and specifications

Beyerdynamic AVENTHO Y

Manufacturer specification · Two integrated microphones with ENC; a META VOICE boom microphone is an optional accessory.

beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Battery life

Sennheiser HD 820Not verified

Beyerdynamic AVENTHO YUp to 90 hours without ANC; up to 60 hours with ANC

Sources

Sennheiser HD 820

The reviewed exact sources do not explicitly establish battery life or that no battery is required for operation. A wired/dynamic audio path, omitted charger or Battery included N is not an explicit operating-power requirement. · Manufacturer specification

Sennheiser HD 820 — official UK product page and specifications

Beyerdynamic AVENTHO Y

Manufacturer specification · The specification sheet says 'up to'; the product page's technical data says 'More than 90 hours' and 'More than 60 hours' with ANC. The battery is user-replaceable.

beyerdynamic AVENTHO Y — global product page and technical data beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Nominal impedance

Sennheiser HD 820300 ohm

Beyerdynamic AVENTHO YNot verified

Sources

Sennheiser HD 820

Manufacturer specification

Sennheiser HD 820 — official UK product page and specifications Sennheiser UK store — HD 820 product variant data (SKU and EAN)

Beyerdynamic AVENTHO Y

No source recorded for this side.

Evidence is missing or conflicting on at least one side. This is not a verified difference.

App features

Sennheiser HD 820Not verified

Beyerdynamic AVENTHO Ybeyerdynamic app: customise music playback and device controls, 5-band equaliser, over-the-air firmware updates

Sources

Sennheiser HD 820

No source recorded for this side.

Beyerdynamic AVENTHO Y

Manufacturer specification

beyerdynamic AVENTHO Y — global product page and technical data beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Bluetooth codecs

Sennheiser HD 820Not verified

Beyerdynamic AVENTHO YSBC, AAC

Sources

Sennheiser HD 820

No source recorded for this side.

Beyerdynamic AVENTHO Y

Manufacturer specification

beyerdynamic AVENTHO Y — global product page and technical data beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Bluetooth version and profiles

Sennheiser HD 820Not verified

Beyerdynamic AVENTHO YBluetooth 6.0; HFP, A2DP, AVRCP

Sources

Sennheiser HD 820

No source recorded for this side.

Beyerdynamic AVENTHO Y

Manufacturer specification

beyerdynamic AVENTHO Y — global product page and technical data beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Cable length

Sennheiser HD 8203 m

Beyerdynamic AVENTHO YNot verified

Sources

Sennheiser HD 820

Manufacturer specification

Sennheiser HD 820 — official UK product page and specifications Sennheiser UK store — HD 820 product variant data (SKU and EAN)

Beyerdynamic AVENTHO Y

No source recorded for this side.

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Charge time

Sennheiser HD 820Not verified

Beyerdynamic AVENTHO Y1 hour full charge; 5 minutes gives 6 hours of playtime

Sources

Sennheiser HD 820

No source recorded for this side.

Beyerdynamic AVENTHO Y

Manufacturer specification

beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Charging

Sennheiser HD 820Not verified

Beyerdynamic AVENTHO YUSB-C

Sources

Sennheiser HD 820

No source recorded for this side.

Beyerdynamic AVENTHO Y

Manufacturer specification · Charging temperature range 0 to +45 °C.

beyerdynamic AVENTHO Y — global product page and technical data beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Connectors

Sennheiser HD 8206.35 mm unbalanced (3-pin) and 4.4 mm balanced (5-pin) supplied; XLR-4 balanced (4-pin) cable optional

Beyerdynamic AVENTHO YNot verified

Sources

Sennheiser HD 820

Manufacturer specification

Sennheiser HD 820 — official UK product page and specifications Sennheiser UK store — HD 820 product variant data (SKU and EAN)

Beyerdynamic AVENTHO Y

No source recorded for this side.

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Rated total harmonic distortion

Sennheiser HD 820<0.02% (1 kHz, 100 dB SPL)

Beyerdynamic AVENTHO YNot verified

Sources

Sennheiser HD 820

Manufacturer specification · From the product page's specification table; the same page's feature list states 'Total harmonic distortion: 0.02 % (1 kHz 1 Vrms)', a different test condition.

Sennheiser HD 820 — official UK product page and specifications

Beyerdynamic AVENTHO Y

No source recorded for this side.

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Earpads

Sennheiser HD 820Not verified

Beyerdynamic AVENTHO YInterchangeable, magnetically attached; optional velour ear pads in black/grey

Sources

Sennheiser HD 820

No source recorded for this side.

Beyerdynamic AVENTHO Y

Manufacturer specification

beyerdynamic AVENTHO Y — global product page and technical data beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Construction

Sennheiser HD 820Not verified

Beyerdynamic AVENTHO YFoldable, with aluminium yoke and round ear cups

Sources

Sennheiser HD 820

No source recorded for this side.

Beyerdynamic AVENTHO Y

Manufacturer specification

beyerdynamic AVENTHO Y — global product page and technical data beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Microphone type

Sennheiser HD 820Not verified

Beyerdynamic AVENTHO Y2 integrated microphones with ENC (environmental noise cancellation); META VOICE boom mic available as an optional accessory

Sources

Sennheiser HD 820

No source recorded for this side.

Beyerdynamic AVENTHO Y

Manufacturer specification

beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Multipoint

Sennheiser HD 820Not verified

Beyerdynamic AVENTHO YYes — Multipoint Bluetooth 6.0

Sources

Sennheiser HD 820

No source recorded for this side.

Beyerdynamic AVENTHO Y

Manufacturer specification

beyerdynamic AVENTHO Y — global product page and technical data beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Operating temperature

Sennheiser HD 820Not verified

Beyerdynamic AVENTHO Y−10 to +50 °C

Sources

Sennheiser HD 820

No source recorded for this side.

Beyerdynamic AVENTHO Y

Manufacturer specification

beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Device compatibility

Sennheiser HD 820Not verified

Beyerdynamic AVENTHO YSmartphones, tablets, laptops and desktop computers with Bluetooth; iOS, Android, Windows and macOS

Sources

Sennheiser HD 820

No source recorded for this side.

Beyerdynamic AVENTHO Y

Manufacturer specification

beyerdynamic AVENTHO Y — global product page and technical data

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Rated sensitivity

Sennheiser HD 820103 dB SPL (1 kHz, 1 Vrms)

Beyerdynamic AVENTHO YNot verified

Sources

Sennheiser HD 820

Manufacturer specification · Voltage reference (dB/V), not dB/mW.

Sennheiser HD 820 — official UK product page and specifications Sennheiser UK store — HD 820 product variant data (SKU and EAN)

Beyerdynamic AVENTHO Y

No source recorded for this side.

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Serviceability

Sennheiser HD 820Not verified

Beyerdynamic AVENTHO YUser-replaceable battery in the left ear cup, behind the magnetically attached ear cushion

Sources

Sennheiser HD 820

No source recorded for this side.

Beyerdynamic AVENTHO Y

Manufacturer specification

beyerdynamic AVENTHO Y — global product page and technical data beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Transparency mode

Sennheiser HD 820Not verified

Beyerdynamic AVENTHO YYes

Sources

Sennheiser HD 820

No source recorded for this side.

Beyerdynamic AVENTHO Y

Manufacturer specification

beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Wireless range

Sennheiser HD 820Not verified

Beyerdynamic AVENTHO YUp to 20 m

Sources

Sennheiser HD 820

No source recorded for this side.

Beyerdynamic AVENTHO Y

Manufacturer specification

beyerdynamic AVENTHO Y — global product page and technical data beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)

Evidence is missing or conflicting on at least one side. This is not a verified difference.

1 shared field has the same recorded value.

YOUR HEADPHONES. YOUR RULES.

Check against your must-haves

Feature matching for the features you select. It doesn’t rate sound or comfort.

Start with your listening setup.

Choose a starting point, then fine-tune your must-haves.

FINE-TUNE THE DETAILS

Your essentials.

These shortcuts select the features shown above. Check the fit against your own equipment and listening space.

A feature match describes the selected requirements. It doesn’t rate sound or comfort.

Open-back designFor a quiet listening spaceClosed-back designAn enclosed outer earcupDetachable cableUnplug the cable at the headphonesBuilt-in microphoneFor calls and voice chatActive noise cancellationNot the same as a closed back

YOUR CHOICE

Sennheiser HD 820

Select a feature to check your fit.

YOUR CHOICE

Beyerdynamic AVENTHO Y

Select a feature to check your fit.

Feature matching, not a sound-quality score. The specification table links to the evidence for each feature.

WHAT EACH CHOICE ASKS OF YOU

What it brings and what to check

Sennheiser HD 820

What it brings

Both an unbalanced 6.35 mm cable and a balanced 4.4 mm cable are supplied, each 3 m long, and an optional XLR-4 balanced cable is available for headphone amplifiers, DACs and other components.
Manufacturer source
Sennheiser attributes ambient-noise attenuation to the closed-back construction but publishes no attenuation figure.
Manufacturer source Manufacturer source
Sennheiser publishes 12–43,800 Hz at −3 dB and 6–48,000 Hz at −10 dB, 300-ohm impedance and 103 dB at 1 kHz, 1 V.
Manufacturer source Manufacturer source

What to check

Sennheiser states the distortion test two ways: below 0.02% at 1 kHz and 100 dB in the specification table, and 0.02% at 1 kHz, 1 Vrms in the feature list.
Manufacturer source
The supplied cables end in 6.35 mm and 4.4 mm plugs; no 3.5 mm plug or adapter is listed in the box, and the XLR-4 cable is optional.
Manufacturer source
The supplied cables are 3 m long, with 6.35 mm unbalanced and 4.4 mm balanced plugs.
Manufacturer source Manufacturer source

Beyerdynamic AVENTHO Y

What it brings

The battery can be replaced by the user — it sits in the left ear cup behind the magnetic ear cushion — and the ear pads are interchangeable.
Manufacturer source Manufacturer source
beyerdynamic rates up to 60 hours with ANC on, and a 5-minute charge gives 6 hours of playtime.
Manufacturer source Manufacturer source
A USB-C dongle and boom microphone can be added later as an optional upgrade package.
Manufacturer source

What to check

The codec list is SBC and AAC only, and the boom microphone and dongle are not in the standard box.
Manufacturer source Manufacturer source
beyerdynamic publishes no ANC attenuation figure, and its battery wording differs between 'up to' (specification sheet) and 'more than' (product page).
Manufacturer source Manufacturer source

COMPARE THE DETAILS

Full specifications

How we verify

Differences only

30 of 30 specifications Sources in each row

Source-backed specifications for Sennheiser HD 820 and Beyerdynamic AVENTHO Y
Specification	Sennheiser HD 820	Beyerdynamic AVENTHO Y

Wearing styleDifferent Sources Sennheiser HD 820 Manufacturer specification Sennheiser HD 820 — official UK product page and specifications Sennheiser UK store — HD 820 product variant data (SKU and EAN) Beyerdynamic AVENTHO Y Manufacturer specification beyerdynamic AVENTHO Y — global product page and technical data beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)	Over-ear (circumaural), closed-back dynamic headphones	Over-ear, closed-back foldable wireless headphones
WeightDifferent Sources Sennheiser HD 820 Manufacturer specification · Without the connection cable, per Sennheiser's UK store data ('360 g without cable'); the product-page table gives 360 g. Sennheiser HD 820 — official UK product page and specifications Sennheiser UK store — HD 820 product variant data (SKU and EAN) Beyerdynamic AVENTHO Y Manufacturer specification · The product pages state 316 g without cable; the specification sheet gives 316 g without stating the basis. beyerdynamic AVENTHO Y — global product page and technical data beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)	360 g	316 g
Acoustic design Sources Sennheiser HD 820 Manufacturer specification Sennheiser HD 820 — official UK product page and specifications Beyerdynamic AVENTHO Y Manufacturer specification beyerdynamic AVENTHO Y — global product page and technical data beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)	Closed-back	Closed-back
Earpads Sources Sennheiser HD 820 No source recorded. Beyerdynamic AVENTHO Y Manufacturer specification beyerdynamic AVENTHO Y — global product page and technical data beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)	Not provided	Interchangeable, magnetically attached; optional velour ear pads in black/grey
Serviceability Sources Sennheiser HD 820 No source recorded. Beyerdynamic AVENTHO Y Manufacturer specification beyerdynamic AVENTHO Y — global product page and technical data beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)	Not provided	User-replaceable battery in the left ear cup, behind the magnetically attached ear cushion
Construction Sources Sennheiser HD 820 No source recorded. Beyerdynamic AVENTHO Y Manufacturer specification beyerdynamic AVENTHO Y — global product page and technical data beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)	Not provided	Foldable, with aluminium yoke and round ear cups

Wired / wireless connectionsDifferent Sources Sennheiser HD 820 Manufacturer specification · Sennheiser's box list names only the 6.35 mm unbalanced and 4.4 mm balanced cables; no 3.5 mm plug or adapter is listed. Sennheiser HD 820 — official UK product page and specifications Sennheiser UK store — HD 820 product variant data (SKU and EAN) Beyerdynamic AVENTHO Y Manufacturer specification · An optional upgrade package adds a USB-C dongle and boom microphone; it is not in the standard box. beyerdynamic AVENTHO Y — global product page and technical data beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)	Wired analogue; detachable 3 m cables with 6.35 mm unbalanced plug (fitted) and 4.4 mm balanced plug, both supplied; XLR-4 balanced cable optional	Bluetooth 6.0 with multipoint; USB-C port (beyerdynamic lists the supplied USB-C to USB-C cable type as 'USB-C / audio cable')
Battery life Sources Sennheiser HD 820 The reviewed exact sources do not explicitly establish battery life or that no battery is required for operation. A wired/dynamic audio path, omitted charger or Battery included N is not an explicit operating-power requirement. · Manufacturer specification Sennheiser HD 820 — official UK product page and specifications Beyerdynamic AVENTHO Y Manufacturer specification · The specification sheet says 'up to'; the product page's technical data says 'More than 90 hours' and 'More than 60 hours' with ANC. The battery is user-replaceable. beyerdynamic AVENTHO Y — global product page and technical data beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)	Not listed by the manufacturer	Up to 90 hours without ANC; up to 60 hours with ANC
Cable length Sources Sennheiser HD 820 Manufacturer specification Sennheiser HD 820 — official UK product page and specifications Sennheiser UK store — HD 820 product variant data (SKU and EAN) Beyerdynamic AVENTHO Y No source recorded.	3 m	Not provided
Connectors Sources Sennheiser HD 820 Manufacturer specification Sennheiser HD 820 — official UK product page and specifications Sennheiser UK store — HD 820 product variant data (SKU and EAN) Beyerdynamic AVENTHO Y No source recorded.	6.35 mm unbalanced (3-pin) and 4.4 mm balanced (5-pin) supplied; XLR-4 balanced (4-pin) cable optional	Not provided
Bluetooth version and profiles Sources Sennheiser HD 820 No source recorded. Beyerdynamic AVENTHO Y Manufacturer specification beyerdynamic AVENTHO Y — global product page and technical data beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)	Not provided	Bluetooth 6.0; HFP, A2DP, AVRCP
Bluetooth codecs Sources Sennheiser HD 820 No source recorded. Beyerdynamic AVENTHO Y Manufacturer specification beyerdynamic AVENTHO Y — global product page and technical data beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)	Not provided	SBC, AAC
Multipoint Sources Sennheiser HD 820 No source recorded. Beyerdynamic AVENTHO Y Manufacturer specification beyerdynamic AVENTHO Y — global product page and technical data beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)	Not provided	Yes — Multipoint Bluetooth 6.0
Wireless range Sources Sennheiser HD 820 No source recorded. Beyerdynamic AVENTHO Y Manufacturer specification beyerdynamic AVENTHO Y — global product page and technical data beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)	Not provided	Up to 20 m
Charge time Sources Sennheiser HD 820 No source recorded. Beyerdynamic AVENTHO Y Manufacturer specification beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)	Not provided	1 hour full charge; 5 minutes gives 6 hours of playtime
Charging Sources Sennheiser HD 820 No source recorded. Beyerdynamic AVENTHO Y Manufacturer specification · Charging temperature range 0 to +45 °C. beyerdynamic AVENTHO Y — global product page and technical data beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)	Not provided	USB-C
Device compatibility Sources Sennheiser HD 820 No source recorded. Beyerdynamic AVENTHO Y Manufacturer specification beyerdynamic AVENTHO Y — global product page and technical data	Not provided	Smartphones, tablets, laptops and desktop computers with Bluetooth; iOS, Android, Windows and macOS

Driver constructionDifferent Sources Sennheiser HD 820 Manufacturer specification Sennheiser HD 820 — official UK product page and specifications Beyerdynamic AVENTHO Y Manufacturer specification beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)	56 mm Ring Radiator dynamic transducer with concave Gorilla Glass reflectors	45 mm dynamic driver
Driver sizeDifferent Sources Sennheiser HD 820 Manufacturer specification Sennheiser HD 820 — official UK product page and specifications Beyerdynamic AVENTHO Y Manufacturer specification beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)	56 mm	45 mm
Rated frequency rangeDifferent Sources Sennheiser HD 820 Manufacturer specification Sennheiser HD 820 — official UK product page and specifications Sennheiser UK store — HD 820 product variant data (SKU and EAN) Beyerdynamic AVENTHO Y Manufacturer specification beyerdynamic AVENTHO Y — global product page and technical data beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)	12–43,800 Hz (−3 dB); 6–48,000 Hz (−10 dB)	20–20,000 Hz
Nominal impedance Sources Sennheiser HD 820 Manufacturer specification Sennheiser HD 820 — official UK product page and specifications Sennheiser UK store — HD 820 product variant data (SKU and EAN) Beyerdynamic AVENTHO Y No source recorded.	300 ohm	Not provided
Rated sensitivity Sources Sennheiser HD 820 Manufacturer specification · Voltage reference (dB/V), not dB/mW. Sennheiser HD 820 — official UK product page and specifications Sennheiser UK store — HD 820 product variant data (SKU and EAN) Beyerdynamic AVENTHO Y No source recorded.	103 dB SPL (1 kHz, 1 Vrms)	Not provided
Rated total harmonic distortion Sources Sennheiser HD 820 Manufacturer specification · From the product page's specification table; the same page's feature list states 'Total harmonic distortion: 0.02 % (1 kHz 1 Vrms)', a different test condition. Sennheiser HD 820 — official UK product page and specifications Beyerdynamic AVENTHO Y No source recorded.	<0.02% (1 kHz, 100 dB SPL)	Not provided

Microphone Sources Sennheiser HD 820 The reviewed exact sources do not explicitly establish microphone absence. Omission from a package or technical inventory, a stereo audio connector, and a without-remote statement do not establish microphone=false. · Manufacturer specification Sennheiser HD 820 — official UK product page and specifications Beyerdynamic AVENTHO Y Manufacturer specification · Two integrated microphones with ENC; a META VOICE boom microphone is an optional accessory. beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)	Not listed by the manufacturer	Yes
Active noise cancellation Sources Sennheiser HD 820 The reviewed exact sources do not explicitly establish active noise cancellation absence. Preserve separately sourced acoustic design and passive attenuation; they cannot turn omitted ANC into a false capability. · Manufacturer specification Sennheiser HD 820 — official UK product page and specifications Sennheiser UK store — HD 820 product variant data (SKU and EAN) Beyerdynamic AVENTHO Y Manufacturer specification · No attenuation figure is published. beyerdynamic AVENTHO Y — global product page and technical data beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)	Not listed by the manufacturer	Yes
Microphone type Sources Sennheiser HD 820 No source recorded. Beyerdynamic AVENTHO Y Manufacturer specification beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)	Not provided	2 integrated microphones with ENC (environmental noise cancellation); META VOICE boom mic available as an optional accessory
Transparency mode Sources Sennheiser HD 820 No source recorded. Beyerdynamic AVENTHO Y Manufacturer specification beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)	Not provided	Yes

App features Sources Sennheiser HD 820 No source recorded. Beyerdynamic AVENTHO Y Manufacturer specification beyerdynamic AVENTHO Y — global product page and technical data beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)	Not provided	beyerdynamic app: customise music playback and device controls, 5-band equaliser, over-the-air firmware updates

In the boxDifferent Sources Sennheiser HD 820 Manufacturer specification Sennheiser HD 820 — official UK product page and specifications Beyerdynamic AVENTHO Y Manufacturer specification beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)	Headphones, cable with 6.35 mm unbalanced plug (fitted), cable with 4.4 mm balanced plug, instruction manual, storage box, microfibre cloth	AVENTHO Y headphones, USB-C to USB-C charging cable, soft bag, quick start guide, compliance booklet

Operating temperature Sources Sennheiser HD 820 No source recorded. Beyerdynamic AVENTHO Y Manufacturer specification beyerdynamic AVENTHO Y — English specification sheet (E1, 07.26)	Not provided	−10 to +50 °C

First product manufacturer source Second product manufacturer source

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Impedance: 48 Ω
Cable length: 2.5 m
Wearing style: Over-ear (circumaural), closed-back wired gaming headset with boom microphone

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Beyerdynamic AVENTHO 300

Wearing style: Over-ear (circumaural), closed-back, foldable wireless headphones
Wired / wireless connections: Bluetooth 5.4 with multipoint (AAC, aptX Lossless, aptX Adaptive, LE Audio); USB-C charging port; supplied 3.5 mm mini-jack cable
Microphone: Yes

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Sennheiser ACCENTUM Wireless

Wearing style: Over-ear (circumaural), closed-back wireless headphones
Wired / wireless connections: Bluetooth 5.2 (SBC, AAC, aptX HD); USB-C for charging, calls and streaming from a PC/Mac/mobile device
Microphone: Yes

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Sennheiser MOMENTUM 5 Wireless

Wearing style: Over-ear (circumaural), closed-back wireless headphones with a fold-flat design
Dimensions: 180 x 197 x 47 mm (folded flat)
Wired / wireless connections: Bluetooth 5.4 (SBC, AAC, aptX, aptX HD, aptX Lossless, aptX Adaptive); USB-C for charging, calls and streaming from a PC/Mac; 2.5 mm analogue input with supplied 2.5 mm-to-3.5 mm cable

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Each record represents an explicitly checked model and configuration. Original import: 5 Sept 2026; this is not its verification date. This is not a list of current offers or a popularity ranking.