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HEADPHONES · YOUR NEXT FACE-OFF

Beyerdynamic DT 770 PRO vs Beyerdynamic DT 990 PRO 250 ohm

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

Classic Beyerdynamic DT 770 PRO headphones with the 80 OHM badge, grey velour pads and fixed single-sided cable visible
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 DT 770 PRO for

  • A closed-back design
  • Lower stated nominal impedance: 80 ohm vs 250 ohm

Choose the DT 990 PRO 250 ohm for

  • An open-back design
  • Higher stated nominal impedance: 250 ohm vs 80 ohm
Built from verified specifications that differ. Not a rating or a recommendation.
See the 10 verified differences
THE CONTENDER

Beyerdynamic DT 990 PRO 250 ohm

459038 · 250 ohm · coiled cable

beyerdynamic DT 990 PRO 250 ohm open-back studio headphones with grey velour ear pads, perspective view
Full product profile Official image
Exact model & source notes

The DT 990 PRO in its 250-ohm version (article 459038) is beyerdynamic's open-back, around-ear wired studio headphone with a fixed, single-sided 3 m coiled cable, a 3.5 mm plug and a 6.35 mm adapter. It is passive, has no microphone and is intended for listening and editing rather than for isolation; it works with beyerdynamic's free HEADPHONE LAB plug-in.

Specifications checked 26 Sept 2026.

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

Manufacturer specifications

DT 770 PRO UK & US retailers

UK
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US
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UK & US price history: no verified listing yet

DT 990 PRO 250 ohm UK & US retailers

UK
Search Amazon UKSearch eBay UK
US
Search Amazon USSearch eBay US

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
Beyerdynamic DT 990 PRO 250 ohm250 Ω

Manufacturer specification · Nominal impedance; a 250-ohm load needs a source or headphone amplifier able to drive it.

Source 1Source 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 ↓

10 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
Beyerdynamic DT 990 PRO 250 ohmWired; fixed (non-detachable) single-sided 3 m coiled cable with 3.5 mm stereo mini-jack and 6.35 mm (1/4-inch) adapter
Sources
Beyerdynamic DT 990 PRO 250 ohm

Manufacturer specification · beyerdynamic's FAQ on the product page states that the classic DT models, naming the DT 990 PRO, have fixed cables, whereas PRO X models come with detachable cables. The 80-ohm model (718173) has a straight cable instead; this record is the 250-ohm coiled-cable model.

beyerdynamic DT 990 PRO, 250 Ohms — official product page and technical data (global store)beyerdynamic DT 990 PRO — spec sheet E1/DT 990 PRO (08.22)

Check the exact configuration and source conditions for your use.

Nominal impedance

In Visual facts
Beyerdynamic DT 770 PRO80 ohm
Beyerdynamic DT 990 PRO 250 ohm250 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
Beyerdynamic DT 990 PRO 250 ohm

Manufacturer specification · Nominal impedance; a 250-ohm load needs a source or headphone amplifier able to drive it.

beyerdynamic DT 990 PRO, 250 Ohms — official product page and technical data (global store)beyerdynamic DT 990 PRO — spec sheet E1/DT 990 PRO (08.22)

Check the exact configuration and source conditions for your use.

Driver construction

Beyerdynamic DT 770 PRODynamic transducer with a bass-reflex acoustic system
Beyerdynamic DT 990 PRO 250 ohmDynamic
Sources
Beyerdynamic DT 990 PRO 250 ohm

Manufacturer specification · Driver diameter is not published in the sources read.

beyerdynamic DT 990 PRO — spec sheet E1/DT 990 PRO (08.22)

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
Beyerdynamic DT 990 PRO 250 ohmGold-plated 3.5 mm stereo mini-jack with 6.35 mm (1/4-inch) adapter
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 specificationsBeyerdynamic DT 770 PRO — current instruction manual
Beyerdynamic DT 990 PRO 250 ohm

Manufacturer specification

beyerdynamic DT 990 PRO — spec sheet E1/DT 990 PRO (08.22)

Check the exact configuration and source conditions for your use.

Wearing style

Beyerdynamic DT 770 PROOver-ear (circumaural), closed-back dynamic headphones
Beyerdynamic DT 990 PRO 250 ohmOver-ear (circumaural), open-back wired studio headphones
Sources
Beyerdynamic DT 770 PRO

Manufacturer specification

Beyerdynamic DT 770 PRO — manufacturer specifications

Check the exact configuration and source conditions for your use.

Show 4 more verified differences

Earpads

Beyerdynamic DT 770 PROGrey velour
Beyerdynamic DT 990 PRO 250 ohmVelour, circumaural, replaceable (spare part EDT 990 V)
Sources
Beyerdynamic DT 770 PRO

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

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

Check the exact configuration and source conditions for your use.

Frequency characteristic

Beyerdynamic DT 770 PRODiffuse-field equalised
Beyerdynamic DT 990 PRO 250 ohmDiffuse-field
Sources
Beyerdynamic DT 990 PRO 250 ohm

Manufacturer specification · Spec sheet feature: 'Open diffuse field studio headphones'.

beyerdynamic DT 990 PRO — spec sheet E1/DT 990 PRO (08.22)

Check the exact configuration and source conditions for your use.

Nominal sound pressure level

Beyerdynamic DT 770 PRO96 dB
Beyerdynamic DT 990 PRO 250 ohm96 dB nominal SPL
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 specificationsBeyerdynamic DT 770 PRO — current instruction manual
Beyerdynamic DT 990 PRO 250 ohm

Manufacturer specification · beyerdynamic does not state the reference (per mW or per V) in these sources; specifications are stated according to EN 60 268-7.

beyerdynamic DT 990 PRO, 250 Ohms — official product page and technical data (global store)beyerdynamic DT 990 PRO — spec sheet E1/DT 990 PRO (08.22)

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.

Replaceable components

Beyerdynamic DT 770 PROUser-replaceable ear and headband pads; other repairs through service
Beyerdynamic DT 990 PRO 250 ohmEvery part serviceable; ear pads (EDT 990 V) and headband pad (BN 59-53/D) listed as replacement parts
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 modelBeyerdynamic DT 770 PRO — current instruction manual
Beyerdynamic DT 990 PRO 250 ohm

Manufacturer specification · Product page: 'And if something does need replacing – every part is serviceable.' Its FAQ adds that all models are designed for long-term use thanks to their replaceable components. The spec sheet lists replacement parts EDT 990 V (ear pads, velours, circumaural, order # 926.679) and BN 59-53/D (headband pad, order # 990.681).

beyerdynamic DT 990 PRO, 250 Ohms — official product page and technical data (global store)beyerdynamic DT 990 PRO — spec sheet E1/DT 990 PRO (08.22)

Check the exact configuration and source conditions for your use.

Missing or non-comparable evidence (11)

Active noise cancellation

Beyerdynamic DT 770 PRONot verified
Beyerdynamic DT 990 PRO 250 ohmNo
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 specificationsBeyerdynamic DT 770 PRO — current instruction manual
Beyerdynamic DT 990 PRO 250 ohm

Manufacturer specification · Passive, open-back design; no active noise cancellation is listed, and open-back headphones let outside sound through.

beyerdynamic DT 990 PRO, 250 Ohms — official product page and technical data (global store)

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
Beyerdynamic DT 990 PRO 250 ohmNo
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 specificationsBeyerdynamic DT 770 PRO — current instruction manual
Beyerdynamic DT 990 PRO 250 ohm

Manufacturer specification · Stereo headphone plug; no microphone or remote is listed.

beyerdynamic DT 990 PRO, 250 Ohms — official product page and technical data (global store)beyerdynamic DT 990 PRO — spec sheet E1/DT 990 PRO (08.22)

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

Battery life

Beyerdynamic DT 770 PRONot verified
Beyerdynamic DT 990 PRO 250 ohmNot required: passive wired headphones powered by the audio source
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 specificationsBeyerdynamic DT 770 PRO — current instruction manual
Beyerdynamic DT 990 PRO 250 ohm

Manufacturer specification · Passive headphones with no battery or charging.

beyerdynamic DT 990 PRO, 250 Ohms — official product page and technical data (global store)beyerdynamic DT 990 PRO — spec sheet E1/DT 990 PRO (08.22)

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
Beyerdynamic DT 990 PRO 250 ohmNot verified
Sources
Beyerdynamic DT 770 PRO

Manufacturer specification

Beyerdynamic DT 770 PRO — manufacturer specifications
Beyerdynamic DT 990 PRO 250 ohm

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
Beyerdynamic DT 990 PRO 250 ohmNot 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 specificationsBeyerdynamic DT 770 PRO — 80-ohm modelBeyerdynamic DT 770 PRO — current instruction manual
Beyerdynamic DT 990 PRO 250 ohm

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
Beyerdynamic DT 990 PRO 250 ohmNot verified
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 specificationsBeyerdynamic DT 770 PRO — 80-ohm modelBeyerdynamic DT 770 PRO — current instruction manual
Beyerdynamic DT 990 PRO 250 ohm

No source recorded for this side.

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

Nominal headband pressure

Beyerdynamic DT 770 PRONot verified
Beyerdynamic DT 990 PRO 250 ohmApprox. 3.5–5.5 N
Sources
Beyerdynamic DT 770 PRO

No source recorded for this side.

Beyerdynamic DT 990 PRO 250 ohm

Manufacturer specification · The current product page gives a 3.5–5.5 N range; the 08.22 spec sheet gives approx. 3.5 N.

beyerdynamic DT 990 PRO, 250 Ohms — official product page and technical data (global store)beyerdynamic DT 990 PRO — spec sheet E1/DT 990 PRO (08.22)

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
Beyerdynamic DT 990 PRO 250 ohmNot 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 specificationsBeyerdynamic DT 770 PRO — current instruction manual
Beyerdynamic DT 990 PRO 250 ohm

No source recorded for this side.

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

Power handling

Beyerdynamic DT 770 PRONot verified
Beyerdynamic DT 990 PRO 250 ohm100 mW
Sources
Beyerdynamic DT 770 PRO

No source recorded for this side.

Beyerdynamic DT 990 PRO 250 ohm

Manufacturer specification

beyerdynamic DT 990 PRO — spec sheet E1/DT 990 PRO (08.22)

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

Weight without cable

Beyerdynamic DT 770 PRONot verified
Beyerdynamic DT 990 PRO 250 ohm250 g
Sources
Beyerdynamic DT 770 PRO

No source recorded for this side.

Beyerdynamic DT 990 PRO 250 ohm

Manufacturer specification · Headphones without cable, per the product pages' technical data ('Weight headphones without cable 250 g'). The same product pages state 'Weighing just 375 grams including the cable' (recorded separately as weight including cable), and the 08.22 spec sheet lists 370 g for the 250-ohm version without stating whether the cable is included.

beyerdynamic DT 990 PRO, 250 Ohms — official product page and technical data (global store)beyerdynamic DT 990 PRO, 250 Ohms — official North America store page and technical databeyerdynamic DT 990 PRO — spec sheet E1/DT 990 PRO (08.22)

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

5 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.

YOUR CHOICE

Beyerdynamic DT 770 PRO

Select a feature to check your fit.

YOUR CHOICE

Beyerdynamic DT 990 PRO 250 ohm

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

What to check

Beyerdynamic DT 990 PRO 250 ohm

What it brings

  • Replaceable velour ear pads and a headband pad are listed as spare parts, so the wearing parts can be renewed rather than replacing the headphones.
    Manufacturer source Manufacturer source
  • The single-sided coiled cable ends in a gold-plated 3.5 mm plug with a 1/4-inch (6.35 mm) adapter, and beyerdynamic says the single-sided cable makes the headphones easier to handle when they are constantly put on and taken off.
    Manufacturer source Manufacturer source

What to check

  • At 250 ohms nominal impedance, phones and laptop outputs may not drive it to a comfortable level; beyerdynamic also lists an 80-ohm version (718173) of the same model.
    Manufacturer source Manufacturer source
  • The open-back design lets sound in and out, and there is no microphone, so it is unsuited to noisy places, recording next to a microphone or calls.
    Manufacturer source Manufacturer source
  • The cable is fixed rather than detachable: beyerdynamic states that its classic DT models, including the DT 990 PRO, have fixed cables, whereas its PRO X models come with detachable cables.
    Manufacturer source
COMPARE THE DETAILS

Full specifications

How we verify
26 of 26 specifications Sources in each row
Source-backed specifications for Beyerdynamic DT 770 PRO and Beyerdynamic DT 990 PRO 250 ohm
SpecificationBeyerdynamic DT 770 PROBeyerdynamic DT 990 PRO 250 ohm
Wearing styleDifferent
Sources
Beyerdynamic DT 770 PRO

Manufacturer specification

Beyerdynamic DT 770 PRO — manufacturer specifications
Over-ear (circumaural), closed-back dynamic headphonesOver-ear (circumaural), open-back wired studio headphones
Acoustic designDifferent
Sources
Beyerdynamic DT 770 PRO

Manufacturer specification

Beyerdynamic DT 770 PRO — manufacturer specifications
Closed-backOpen-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 specificationsBeyerdynamic DT 770 PRO — 80-ohm modelBeyerdynamic DT 770 PRO — current instruction manual
Beyerdynamic DT 990 PRO 250 ohm

Manufacturer specification · Including the cable, per the product pages ('Weighing just 375 grams including the cable'). The 08.22 spec sheet lists 370 g for the 250-ohm version without stating whether the cable is included; the product pages' technical data gives 250 g without cable.

beyerdynamic DT 990 PRO, 250 Ohms — official product page and technical data (global store)beyerdynamic DT 990 PRO, 250 Ohms — official North America store page and technical databeyerdynamic DT 990 PRO — spec sheet E1/DT 990 PRO (08.22)
375 g375 g
EarpadsDifferent
Sources
Beyerdynamic DT 770 PRO

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

Beyerdynamic DT 770 PRO — 80-ohm modelBeyerdynamic DT 770 PRO — current instruction manual
Grey velourVelour, circumaural, replaceable (spare part EDT 990 V)
Replaceable componentsDifferent
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 modelBeyerdynamic DT 770 PRO — current instruction manual
Beyerdynamic DT 990 PRO 250 ohm

Manufacturer specification · Product page: 'And if something does need replacing – every part is serviceable.' Its FAQ adds that all models are designed for long-term use thanks to their replaceable components. The spec sheet lists replacement parts EDT 990 V (ear pads, velours, circumaural, order # 926.679) and BN 59-53/D (headband pad, order # 990.681).

beyerdynamic DT 990 PRO, 250 Ohms — official product page and technical data (global store)beyerdynamic DT 990 PRO — spec sheet E1/DT 990 PRO (08.22)
User-replaceable ear and headband pads; other repairs through serviceEvery part serviceable; ear pads (EDT 990 V) and headband pad (BN 59-53/D) listed as replacement parts
Weight without cable
Sources
Beyerdynamic DT 770 PRO

No source recorded.

Beyerdynamic DT 990 PRO 250 ohm

Manufacturer specification · Headphones without cable, per the product pages' technical data ('Weight headphones without cable 250 g'). The same product pages state 'Weighing just 375 grams including the cable' (recorded separately as weight including cable), and the 08.22 spec sheet lists 370 g for the 250-ohm version without stating whether the cable is included.

beyerdynamic DT 990 PRO, 250 Ohms — official product page and technical data (global store)beyerdynamic DT 990 PRO, 250 Ohms — official North America store page and technical databeyerdynamic DT 990 PRO — spec sheet E1/DT 990 PRO (08.22)
Not provided250 g
Nominal headband pressure
Sources
Beyerdynamic DT 770 PRO

No source recorded.

Beyerdynamic DT 990 PRO 250 ohm

Manufacturer specification · The current product page gives a 3.5–5.5 N range; the 08.22 spec sheet gives approx. 3.5 N.

beyerdynamic DT 990 PRO, 250 Ohms — official product page and technical data (global store)beyerdynamic DT 990 PRO — spec sheet E1/DT 990 PRO (08.22)
Not providedApprox. 3.5–5.5 N
Wired / wireless connectionsDifferent
Sources
Beyerdynamic DT 990 PRO 250 ohm

Manufacturer specification · beyerdynamic's FAQ on the product page states that the classic DT models, naming the DT 990 PRO, have fixed cables, whereas PRO X models come with detachable cables. The 80-ohm model (718173) has a straight cable instead; this record is the 250-ohm coiled-cable model.

beyerdynamic DT 990 PRO, 250 Ohms — official product page and technical data (global store)beyerdynamic DT 990 PRO — spec sheet E1/DT 990 PRO (08.22)
Wired; fixed single-sided 3.5 mm stereo cable with supplied screw-on 6.35 mm adapterWired; fixed (non-detachable) single-sided 3 m coiled cable with 3.5 mm stereo mini-jack and 6.35 mm (1/4-inch) adapter
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 specificationsBeyerdynamic DT 770 PRO — current instruction manual
Beyerdynamic DT 990 PRO 250 ohm

Manufacturer specification · Passive headphones with no battery or charging.

beyerdynamic DT 990 PRO, 250 Ohms — official product page and technical data (global store)beyerdynamic DT 990 PRO — spec sheet E1/DT 990 PRO (08.22)
Not listed by the manufacturerNot required: passive wired headphones powered by the audio source
Cable length
Sources
Beyerdynamic DT 770 PRO

Manufacturer specification · Straight cable on the 80-ohm model.

Beyerdynamic DT 770 PRO — manufacturer specifications
Beyerdynamic DT 990 PRO 250 ohm

Manufacturer specification · Coiled cable; length as stated by beyerdynamic.

beyerdynamic DT 990 PRO — spec sheet E1/DT 990 PRO (08.22)
3 m3 m
Cable arrangement
Sources
Beyerdynamic DT 770 PRO

Manufacturer specification

Beyerdynamic DT 770 PRO — manufacturer specifications
Beyerdynamic DT 990 PRO 250 ohm

No source recorded.

Fixed, single-sided straight cableNot 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 specificationsBeyerdynamic DT 770 PRO — current instruction manual
Beyerdynamic DT 990 PRO 250 ohm

Manufacturer specification

beyerdynamic DT 990 PRO — spec sheet E1/DT 990 PRO (08.22)
3.5 mm stereo plug; screw-on 6.35 mm adapterGold-plated 3.5 mm stereo mini-jack with 6.35 mm (1/4-inch) adapter
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
Beyerdynamic DT 990 PRO 250 ohm

Manufacturer specification · Nominal impedance; a 250-ohm load needs a source or headphone amplifier able to drive it.

beyerdynamic DT 990 PRO, 250 Ohms — official product page and technical data (global store)beyerdynamic DT 990 PRO — spec sheet E1/DT 990 PRO (08.22)
80 ohm250 ohm
Rated frequency range
Sources
Beyerdynamic DT 770 PRO

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

Beyerdynamic DT 770 PRO — manufacturer specificationsBeyerdynamic DT 770 PRO — current instruction manual
5–35,000 Hz5–35,000 Hz
Frequency characteristicDifferent
Sources
Beyerdynamic DT 990 PRO 250 ohm

Manufacturer specification · Spec sheet feature: 'Open diffuse field studio headphones'.

beyerdynamic DT 990 PRO — spec sheet E1/DT 990 PRO (08.22)
Diffuse-field equalisedDiffuse-field
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 specificationsBeyerdynamic DT 770 PRO — current instruction manual
Beyerdynamic DT 990 PRO 250 ohm

Manufacturer specification · beyerdynamic does not state the reference (per mW or per V) in these sources; specifications are stated according to EN 60 268-7.

beyerdynamic DT 990 PRO, 250 Ohms — official product page and technical data (global store)beyerdynamic DT 990 PRO — spec sheet E1/DT 990 PRO (08.22)
96 dB96 dB nominal SPL
Published distortion limit
Sources
Beyerdynamic DT 770 PRO

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

Beyerdynamic DT 770 PRO — manufacturer specificationsBeyerdynamic DT 770 PRO — current instruction manual
Beyerdynamic DT 990 PRO 250 ohm

Manufacturer specification

beyerdynamic DT 990 PRO — spec sheet E1/DT 990 PRO (08.22)
<0.2%<0.2%
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 specificationsBeyerdynamic DT 770 PRO — current instruction manual
Beyerdynamic DT 990 PRO 250 ohm

No source recorded.

100 mWNot provided
Driver constructionDifferent
Sources
Beyerdynamic DT 990 PRO 250 ohm

Manufacturer specification · Driver diameter is not published in the sources read.

beyerdynamic DT 990 PRO — spec sheet E1/DT 990 PRO (08.22)
Dynamic transducer with a bass-reflex acoustic systemDynamic
Power handling
Sources
Beyerdynamic DT 770 PRO

No source recorded.

Beyerdynamic DT 990 PRO 250 ohm

Manufacturer specification

beyerdynamic DT 990 PRO — spec sheet E1/DT 990 PRO (08.22)
Not provided100 mW
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 specificationsBeyerdynamic DT 770 PRO — current instruction manual
Beyerdynamic DT 990 PRO 250 ohm

Manufacturer specification · Stereo headphone plug; no microphone or remote is listed.

beyerdynamic DT 990 PRO, 250 Ohms — official product page and technical data (global store)beyerdynamic DT 990 PRO — spec sheet E1/DT 990 PRO (08.22)
Not listed by the manufacturerNo
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 specificationsBeyerdynamic DT 770 PRO — current instruction manual
Beyerdynamic DT 990 PRO 250 ohm

Manufacturer specification · Passive, open-back design; no active noise cancellation is listed, and open-back headphones let outside sound through.

beyerdynamic DT 990 PRO, 250 Ohms — official product page and technical data (global store)
Not listed by the manufacturerNo
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 specificationsBeyerdynamic DT 770 PRO — current instruction manual
Beyerdynamic DT 990 PRO 250 ohm

No source recorded.

Approx. 18 dBANot 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 modelBeyerdynamic HEADPHONE LAB — software operation and calibration scope
Beyerdynamic DT 990 PRO 250 ohm

Manufacturer specification · Free plug-in for DAW software (VST3, AU and AAX for Windows and macOS) with crossfeed and optional room simulation; there is no standalone version. beyerdynamic's FACTORY CALIBRATION list names other models, not this DT 990 PRO.

beyerdynamic DT 990 PRO, 250 Ohms — official product page and technical data (global store)beyerdynamic HEADPHONE LAB — plug-in features, formats and FACTORY CALIBRATION model list
Supported through a separate DAW plug-inSupported through a separate DAW plug-in
Show unverified (2)Not verified, not provided or conflicting for both products. Kept for completeness; never counted as a difference.
Specifications without verified values for either product
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 specificationsBeyerdynamic DT 770 PRO — 80-ohm modelBeyerdynamic DT 770 PRO — current instruction manual
Beyerdynamic DT 990 PRO 250 ohm

No source recorded.

Conflicting sourcesNot provided
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 specificationsBeyerdynamic DT 770 PRO — 80-ohm modelBeyerdynamic DT 770 PRO — current instruction manual
Beyerdynamic DT 990 PRO 250 ohm

No source recorded.

Not listed by the manufacturerNot provided
First product manufacturer sourceSecond product manufacturer source
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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.