HEADPHONES · YOUR NEXT FACE-OFF

Beyerdynamic DT 770 PRO vs Sennheiser HD 820

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

Compared products

YOUR FIRST CHOICE

Beyerdynamic DT 770 PRO

Classic black/grey · 80 ohm · 474746

Full product profile Official image

Exact model & source notes

The DT 770 PRO (80 ohm) is a closed-back, over-ear headphone with a dynamic driver and bass-reflex system rated 5–35,000 Hz. It offers about 18 dBA of passive noise attenuation, replaceable velour pads and a fixed 3 m cable.

Specifications checked 11 Sept 2026.

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

Manufacturer specifications

WHICH SUITS YOU?

Choose the Beyerdynamic DT 770 PRO for

Lower stated nominal impedance: 80 ohm vs 300 ohm

Choose the Sennheiser HD 820 for

Higher stated nominal impedance: 300 ohm vs 80 ohm

Built from verified specifications that differ. Not a rating or a recommendation.

See the 7 verified differences

THE CONTENDER

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

Beyerdynamic DT 770 PRO UK & US retailers

UK & US price history: no verified listing yet

Sennheiser HD 820 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 SIDE8 topics

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

SELECTED TOPIC

01 / 08

Impedance

Nominal electrical load, not sound quality or loudness. Output capability and headphone sensitivity matter together; impedance alone cannot decide whether an amplifier is needed.

Beyerdynamic DT 770 PRO80 Ω

Manufacturer specification · Nominal impedance; check that your audio source can drive this load.

Source 1

Sennheiser HD 820300 Ω

Source 1 Source 2

Explore the full specifications

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 ↓

7 verified differences, most decision-relevant first. 1 is also drawn in Visual facts above. Missing information stays separate.

Wired / wireless connections

Beyerdynamic DT 770 PROWired; fixed single-sided 3.5 mm stereo cable with supplied screw-on 6.35 mm adapter

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

Sources

Beyerdynamic DT 770 PRO

Manufacturer specification · Three-pole stereo connection; audio only.

Beyerdynamic DT 770 PRO — manufacturer specifications Beyerdynamic DT 770 PRO — 80-ohm model Beyerdynamic DT 770 PRO — current instruction manual

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)

Check the exact configuration and source conditions for your use.

Nominal impedance

In Visual facts

Beyerdynamic DT 770 PRO80 ohm

Sennheiser HD 820300 ohm

Sources

Beyerdynamic DT 770 PRO

Manufacturer specification · Nominal impedance; check that your audio source can drive this load.

Beyerdynamic DT 770 PRO — manufacturer specifications

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)

Check the exact configuration and source conditions for your use.

Driver construction

Beyerdynamic DT 770 PRODynamic transducer with a bass-reflex acoustic system

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

Sources

Beyerdynamic DT 770 PRO

Manufacturer specification

Beyerdynamic DT 770 PRO — manufacturer specifications Beyerdynamic DT 770 PRO — current instruction manual

Sennheiser HD 820

Manufacturer specification

Sennheiser HD 820 — official UK product page and specifications

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

Supplied plug and adapter

Beyerdynamic DT 770 PRO3.5 mm stereo plug; screw-on 6.35 mm adapter

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

Sources

Beyerdynamic DT 770 PRO

Manufacturer specification · Gold-plated 3.5 mm plug with screw-on adapter; a drawstring bag is also supplied.

Beyerdynamic DT 770 PRO — manufacturer specifications Beyerdynamic DT 770 PRO — current instruction manual

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)

Check the exact configuration and source conditions for your use.

Published distortion limit

Beyerdynamic DT 770 PRO<0.2%

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

Sources

Beyerdynamic DT 770 PRO

Manufacturer specification · beyerdynamic does not state the test level or frequency for this figure.

Beyerdynamic DT 770 PRO — manufacturer specifications Beyerdynamic DT 770 PRO — current instruction manual

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

These published limits can use different input voltages, loudness levels and standards. They cannot establish lower distortion in matched listening conditions.

Rated frequency range

Beyerdynamic DT 770 PRO5–35,000 Hz

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

Sources

Beyerdynamic DT 770 PRO

Manufacturer specification · beyerdynamic does not state the attenuation threshold for this range.

Beyerdynamic DT 770 PRO — manufacturer specifications Beyerdynamic DT 770 PRO — current instruction manual

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)

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

Show 1 more verified difference

Nominal sound pressure level

Beyerdynamic DT 770 PRO96 dB

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

Sources

Beyerdynamic DT 770 PRO

beyerdynamic lists a nominal 96 dB SPL without stating the input reference, so it cannot be compared directly with 1 V rms figures. · Manufacturer specification

Beyerdynamic DT 770 PRO — manufacturer specifications Beyerdynamic DT 770 PRO — current instruction manual

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)

Keep the frequency and voltage or power reference attached. Sensitivity describes output for an input, not sound quality; dB/V and dB/mW are different measures.

Missing or non-comparable evidence (15)

Active noise cancellation

Beyerdynamic DT 770 PRONot verified

Sennheiser HD 820Not verified

Sources

Beyerdynamic DT 770 PRO

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

Beyerdynamic DT 770 PRO — manufacturer specifications Beyerdynamic DT 770 PRO — current instruction manual

Sennheiser HD 820

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

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

Microphone

In Visual facts

Beyerdynamic DT 770 PRONot verified

Sennheiser HD 820Not verified

Sources

Beyerdynamic DT 770 PRO

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

Beyerdynamic DT 770 PRO — manufacturer specifications Beyerdynamic DT 770 PRO — current instruction manual

Sennheiser HD 820

Sennheiser HD 820 — official UK product page and specifications

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

Battery life

Beyerdynamic DT 770 PRONot verified

Sennheiser HD 820Not verified

Sources

Beyerdynamic DT 770 PRO

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

Beyerdynamic DT 770 PRO — manufacturer specifications Beyerdynamic DT 770 PRO — current instruction manual

Sennheiser HD 820

Sennheiser HD 820 — official UK product page and specifications

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

Cable arrangement

Beyerdynamic DT 770 PROFixed, single-sided straight cable

Sennheiser HD 820Not verified

Sources

Beyerdynamic DT 770 PRO

Manufacturer specification

Beyerdynamic DT 770 PRO — manufacturer specifications

Sennheiser HD 820

No source recorded for this side.

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

Published headband pressure

Beyerdynamic DT 770 PROConflicting evidence

Sennheiser HD 820Not verified

Sources

Beyerdynamic DT 770 PRO

beyerdynamic's data sheet lists approx. 3.5 N; its product page lists a firm fit of approx. 3.5–5.5 N. · Manufacturer specification · Nominal clamping force; individual fit and comfort can differ.

Beyerdynamic DT 770 PRO — manufacturer specifications Beyerdynamic DT 770 PRO — 80-ohm model Beyerdynamic DT 770 PRO — current instruction manual

Sennheiser HD 820

No source recorded for this side.

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

Driver diameter

Beyerdynamic DT 770 PRONot verified

Sennheiser HD 82056 mm

Sources

Beyerdynamic DT 770 PRO

beyerdynamic does not state the driver diameter for the 80-ohm DT 770 PRO. · Manufacturer specification

Beyerdynamic DT 770 PRO — manufacturer specifications Beyerdynamic DT 770 PRO — 80-ohm model Beyerdynamic DT 770 PRO — current instruction manual

Sennheiser HD 820

Manufacturer specification

Sennheiser HD 820 — official UK product page and specifications

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

Earpads

Beyerdynamic DT 770 PROGrey velour

Sennheiser HD 820Not verified

Sources

Beyerdynamic DT 770 PRO

Manufacturer specification · User-replaceable; the 32-ohm model uses different pads.

Beyerdynamic DT 770 PRO — 80-ohm model Beyerdynamic DT 770 PRO — current instruction manual

Sennheiser HD 820

No source recorded for this side.

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

Frequency characteristic

Beyerdynamic DT 770 PRODiffuse-field equalised

Sennheiser HD 820Not verified

Sources

Beyerdynamic DT 770 PRO

Manufacturer specification

Beyerdynamic DT 770 PRO — manufacturer specifications Beyerdynamic DT 770 PRO — current instruction manual

Sennheiser HD 820

No source recorded for this side.

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

HEADPHONE LAB software

Beyerdynamic DT 770 PROSupported through a separate DAW plug-in

Sennheiser HD 820Not verified

Sources

Beyerdynamic DT 770 PRO

Manufacturer specification · Separate plug-in for Windows/macOS audio software (VST3, AU, AAX) with crossfeed and optional room simulation; there is no standalone version. beyerdynamic's individual factory-calibration list names other models, not this DT 770 PRO.

Beyerdynamic DT 770 PRO — 80-ohm model Beyerdynamic HEADPHONE LAB — software operation and calibration scope

Sennheiser HD 820

No source recorded for this side.

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

In the box

Beyerdynamic DT 770 PRONot verified

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

Sources

Beyerdynamic DT 770 PRO

No source recorded for this side.

Sennheiser HD 820

Manufacturer specification

Sennheiser HD 820 — official UK product page and specifications

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

Rated input power limit

Beyerdynamic DT 770 PRO100 mW

Sennheiser HD 820Not verified

Sources

Beyerdynamic DT 770 PRO

Manufacturer specification · Power handling capacity, not the amplifier power the headphones need.

Beyerdynamic DT 770 PRO — manufacturer specifications Beyerdynamic DT 770 PRO — current instruction manual

Sennheiser HD 820

No source recorded for this side.

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

Published passive noise attenuation

Beyerdynamic DT 770 PROApprox. 18 dBA

Sennheiser HD 820Not verified

Sources

Beyerdynamic DT 770 PRO

Manufacturer specification · Figure for the 80- and 250-ohm models; the 32-ohm model is rated at about 20 dBA. Not active noise cancellation or hearing protection.

Beyerdynamic DT 770 PRO — manufacturer specifications Beyerdynamic DT 770 PRO — current instruction manual

Sennheiser HD 820

No source recorded for this side.

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

Replaceable components

Beyerdynamic DT 770 PROUser-replaceable ear and headband pads; other repairs through service

Sennheiser HD 820Not verified

Sources

Beyerdynamic DT 770 PRO

Manufacturer specification · The manual explains pad replacement and refers other repairs to beyerdynamic service. The cable is fixed at the earcup.

Beyerdynamic DT 770 PRO — 80-ohm model Beyerdynamic DT 770 PRO — current instruction manual

Sennheiser HD 820

No source recorded for this side.

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

Weight including cable

Beyerdynamic DT 770 PRO375 g

Sennheiser HD 820Not verified

Sources

Beyerdynamic DT 770 PRO

Manufacturer specification · Including cable, per beyerdynamic's product page; its data sheet and manual list 345 g without saying whether the cable is included.

Beyerdynamic DT 770 PRO — manufacturer specifications Beyerdynamic DT 770 PRO — 80-ohm model Beyerdynamic DT 770 PRO — current instruction manual

Sennheiser HD 820

No source recorded for this side.

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

Weight

Beyerdynamic DT 770 PRONot verified

Sennheiser HD 820360 g

Sources

Beyerdynamic DT 770 PRO

No source recorded for this side.

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)

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

3 shared fields have 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

Beyerdynamic DT 770 PRO

Select a feature to check your fit.

YOUR CHOICE

Sennheiser HD 820

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

Beyerdynamic DT 770 PRO

What it brings

The closed-back design gives about 18 dBA of passive noise attenuation, and its dynamic driver with bass-reflex system is rated 5–35,000 Hz at 80 ohms.
Manufacturer source Manufacturer source Manufacturer source
A 3.5 mm plug with a screw-on 6.35 mm adapter covers both common headphone sockets, and the ear and headband pads can be replaced by the owner.
Manufacturer source Manufacturer source Manufacturer source

What to check

The supplied straight cable is 3 m long.
Manufacturer source Manufacturer source Manufacturer source
It weighs 375 g with the cable and is built for a firm professional fit; beyerdynamic's pages give the headband pressure as about 3.5 N in one place and 3.5–5.5 N in another.
Manufacturer source Manufacturer source Manufacturer source

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

COMPARE THE DETAILS

Full specifications

How we verify

Differences only

25 of 25 specifications Sources in each row

Source-backed specifications for Beyerdynamic DT 770 PRO and Sennheiser HD 820
Specification	Beyerdynamic DT 770 PRO	Sennheiser HD 820

Wearing style Sources Beyerdynamic DT 770 PRO Manufacturer specification Beyerdynamic DT 770 PRO — manufacturer specifications 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)	Over-ear (circumaural), closed-back dynamic headphones	Over-ear (circumaural), closed-back dynamic headphones
Acoustic design Sources Beyerdynamic DT 770 PRO Manufacturer specification Beyerdynamic DT 770 PRO — manufacturer specifications Sennheiser HD 820 Manufacturer specification Sennheiser HD 820 — official UK product page and specifications	Closed-back	Closed-back
Weight including cable Sources Beyerdynamic DT 770 PRO Manufacturer specification · Including cable, per beyerdynamic's product page; its data sheet and manual list 345 g without saying whether the cable is included. Beyerdynamic DT 770 PRO — manufacturer specifications Beyerdynamic DT 770 PRO — 80-ohm model Beyerdynamic DT 770 PRO — current instruction manual Sennheiser HD 820 No source recorded.	375 g	Not provided
Earpads Sources Beyerdynamic DT 770 PRO Manufacturer specification · User-replaceable; the 32-ohm model uses different pads. Beyerdynamic DT 770 PRO — 80-ohm model Beyerdynamic DT 770 PRO — current instruction manual Sennheiser HD 820 No source recorded.	Grey velour	Not provided
Replaceable components Sources Beyerdynamic DT 770 PRO Manufacturer specification · The manual explains pad replacement and refers other repairs to beyerdynamic service. The cable is fixed at the earcup. Beyerdynamic DT 770 PRO — 80-ohm model Beyerdynamic DT 770 PRO — current instruction manual Sennheiser HD 820 No source recorded.	User-replaceable ear and headband pads; other repairs through service	Not provided
Weight Sources Beyerdynamic DT 770 PRO No source recorded. 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)	Not provided	360 g

Wired / wireless connectionsDifferent Sources Beyerdynamic DT 770 PRO Manufacturer specification · Three-pole stereo connection; audio only. Beyerdynamic DT 770 PRO — manufacturer specifications Beyerdynamic DT 770 PRO — 80-ohm model Beyerdynamic DT 770 PRO — current instruction manual 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)	Wired; fixed single-sided 3.5 mm stereo cable with supplied screw-on 6.35 mm adapter	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
Cable length Sources Beyerdynamic DT 770 PRO Manufacturer specification · Straight cable on the 80-ohm model. Beyerdynamic DT 770 PRO — manufacturer specifications 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)	3 m	3 m
Cable arrangement Sources Beyerdynamic DT 770 PRO Manufacturer specification Beyerdynamic DT 770 PRO — manufacturer specifications Sennheiser HD 820 No source recorded.	Fixed, single-sided straight cable	Not provided
Supplied plug and adapterDifferent Sources Beyerdynamic DT 770 PRO Manufacturer specification · Gold-plated 3.5 mm plug with screw-on adapter; a drawstring bag is also supplied. Beyerdynamic DT 770 PRO — manufacturer specifications Beyerdynamic DT 770 PRO — current instruction manual 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)	3.5 mm stereo plug; screw-on 6.35 mm adapter	6.35 mm unbalanced (3-pin) and 4.4 mm balanced (5-pin) supplied; XLR-4 balanced (4-pin) cable optional

Nominal impedanceDifferent Sources Beyerdynamic DT 770 PRO Manufacturer specification · Nominal impedance; check that your audio source can drive this load. Beyerdynamic DT 770 PRO — manufacturer specifications 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)	80 ohm	300 ohm
Rated frequency rangeDifferent Sources Beyerdynamic DT 770 PRO Manufacturer specification · beyerdynamic does not state the attenuation threshold for this range. Beyerdynamic DT 770 PRO — manufacturer specifications Beyerdynamic DT 770 PRO — current instruction manual 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)	5–35,000 Hz	12–43,800 Hz (−3 dB); 6–48,000 Hz (−10 dB)
Frequency characteristic Sources Beyerdynamic DT 770 PRO Manufacturer specification Beyerdynamic DT 770 PRO — manufacturer specifications Beyerdynamic DT 770 PRO — current instruction manual Sennheiser HD 820 No source recorded.	Diffuse-field equalised	Not provided
Nominal sound pressure levelDifferent Sources Beyerdynamic DT 770 PRO beyerdynamic lists a nominal 96 dB SPL without stating the input reference, so it cannot be compared directly with 1 V rms figures. · Manufacturer specification Beyerdynamic DT 770 PRO — manufacturer specifications Beyerdynamic DT 770 PRO — current instruction manual 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)	96 dB	103 dB SPL (1 kHz, 1 Vrms)
Published distortion limitDifferent Sources Beyerdynamic DT 770 PRO Manufacturer specification · beyerdynamic does not state the test level or frequency for this figure. Beyerdynamic DT 770 PRO — manufacturer specifications Beyerdynamic DT 770 PRO — current instruction manual 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	<0.2%	<0.02% (1 kHz, 100 dB SPL)
Rated input power limit Sources Beyerdynamic DT 770 PRO Manufacturer specification · Power handling capacity, not the amplifier power the headphones need. Beyerdynamic DT 770 PRO — manufacturer specifications Beyerdynamic DT 770 PRO — current instruction manual Sennheiser HD 820 No source recorded.	100 mW	Not provided
Driver constructionDifferent Sources Beyerdynamic DT 770 PRO Manufacturer specification Beyerdynamic DT 770 PRO — manufacturer specifications Beyerdynamic DT 770 PRO — current instruction manual Sennheiser HD 820 Manufacturer specification Sennheiser HD 820 — official UK product page and specifications	Dynamic transducer with a bass-reflex acoustic system	56 mm Ring Radiator dynamic transducer with concave Gorilla Glass reflectors
Driver diameter Sources Beyerdynamic DT 770 PRO beyerdynamic does not state the driver diameter for the 80-ohm DT 770 PRO. · Manufacturer specification Beyerdynamic DT 770 PRO — manufacturer specifications Beyerdynamic DT 770 PRO — 80-ohm model Beyerdynamic DT 770 PRO — current instruction manual Sennheiser HD 820 Manufacturer specification Sennheiser HD 820 — official UK product page and specifications	Not listed by the manufacturer	56 mm

Published passive noise attenuation Sources Beyerdynamic DT 770 PRO Manufacturer specification · Figure for the 80- and 250-ohm models; the 32-ohm model is rated at about 20 dBA. Not active noise cancellation or hearing protection. Beyerdynamic DT 770 PRO — manufacturer specifications Beyerdynamic DT 770 PRO — current instruction manual Sennheiser HD 820 No source recorded.	Approx. 18 dBA	Not provided

HEADPHONE LAB software Sources Beyerdynamic DT 770 PRO Manufacturer specification · Separate plug-in for Windows/macOS audio software (VST3, AU, AAX) with crossfeed and optional room simulation; there is no standalone version. beyerdynamic's individual factory-calibration list names other models, not this DT 770 PRO. Beyerdynamic DT 770 PRO — 80-ohm model Beyerdynamic HEADPHONE LAB — software operation and calibration scope Sennheiser HD 820 No source recorded.	Supported through a separate DAW plug-in	Not provided

In the box Sources Beyerdynamic DT 770 PRO No source recorded. Sennheiser HD 820 Manufacturer specification Sennheiser HD 820 — official UK product page and specifications	Not provided	Headphones, cable with 6.35 mm unbalanced plug (fitted), cable with 4.4 mm balanced plug, instruction manual, storage box, microfibre cloth

Show unverified (4)Not verified, not provided or conflicting for both products. Kept for completeness; never counted as a difference.

Specifications without verified values for either product
Microphone Sources Beyerdynamic DT 770 PRO 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 Beyerdynamic DT 770 PRO — manufacturer specifications Beyerdynamic DT 770 PRO — current instruction manual 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	Not listed by the manufacturer	Not listed by the manufacturer
Active noise cancellation Sources Beyerdynamic DT 770 PRO 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 Beyerdynamic DT 770 PRO — manufacturer specifications Beyerdynamic DT 770 PRO — current instruction manual 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)	Not listed by the manufacturer	Not listed by the manufacturer
Battery life Sources Beyerdynamic DT 770 PRO 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 Beyerdynamic DT 770 PRO — manufacturer specifications Beyerdynamic DT 770 PRO — current instruction manual 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	Not listed by the manufacturer	Not listed by the manufacturer
Published headband pressure Sources Beyerdynamic DT 770 PRO beyerdynamic's data sheet lists approx. 3.5 N; its product page lists a firm fit of approx. 3.5–5.5 N. · Manufacturer specification · Nominal clamping force; individual fit and comfort can differ. Beyerdynamic DT 770 PRO — manufacturer specifications Beyerdynamic DT 770 PRO — 80-ohm model Beyerdynamic DT 770 PRO — current instruction manual Sennheiser HD 820 No source recorded.	Conflicting sources	Not provided

First product manufacturer source Second product manufacturer source

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Impedance: 130 Ω
Cable length: 3 m
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Cable length: 3 m
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Cable length: 2.5 m
Wearing style: Over-ear (circumaural), closed-back wired gaming headset with boom microphone

Prices & product profile

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.