HEADPHONES · YOUR NEXT FACE-OFF

Beyerdynamic DT 900 PRO X vs Beyerdynamic DT 990 PRO 250 ohm

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

Compared products

YOUR FIRST CHOICE

Beyerdynamic DT 900 PRO X

729906 · 48 ohm · black

Full product profile Official image

Exact model & source notes

The DT 900 PRO X (article 729906) is beyerdynamic's open-back, around-ear wired studio headphone built around its 48-ohm STELLAR.45 dynamic driver. It uses a detachable mini-XLR cable, two straight cables (3 m and 1.8 m) come in the box, and it works with beyerdynamic's free HEADPHONE LAB plug-in, which offers individual factory calibration for this model.

Specifications checked 26 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 900 PRO X for

Lower stated nominal impedance: 48 ohm vs 250 ohm

Choose the DT 990 PRO 250 ohm for

Higher stated nominal impedance: 250 ohm vs 48 ohm

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

See the 13 verified differences

THE CONTENDER

Beyerdynamic DT 990 PRO 250 ohm

459038 · 250 ohm · coiled cable

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 900 PRO X UK & US retailers

UK & US price history: no verified listing yet

DT 990 PRO 250 ohm 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 900 PRO X48 Ω

Source 1 Source 2

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 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 ↓

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

Wired / wireless connections

Beyerdynamic DT 900 PRO XWired; detachable single-sided cable with 3-pin mini-XLR at the headphone and 3.5 mm stereo jack with 6.35 mm (1/4-inch) 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 900 PRO X

Manufacturer specification

beyerdynamic DT 900 PRO X — official product page and technical data (global store)beyerdynamic DT 900 PRO X — spec sheet E1 / DT 900 PRO X (08.21)

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 900 PRO X48 ohm

Beyerdynamic DT 990 PRO 250 ohm250 ohm

Sources

Beyerdynamic DT 900 PRO X

Manufacturer specification

beyerdynamic DT 900 PRO X — official product page and technical data (global store)beyerdynamic DT 900 PRO X — spec sheet E1 / DT 900 PRO X (08.21)

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 900 PRO XDynamic STELLAR.45 driver

Beyerdynamic DT 990 PRO 250 ohmDynamic

Sources

Beyerdynamic DT 900 PRO X

Manufacturer specification · beyerdynamic's driver name; a diameter is not stated in the sources read.

beyerdynamic DT 900 PRO X — spec sheet E1 / DT 900 PRO X (08.21)

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 900 PRO X3-pin mini-XLR (headphone end); gold-plated 3.5 mm stereo jack with 6.35 mm (1/4-inch) 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 900 PRO X

Manufacturer specification

beyerdynamic DT 900 PRO X — spec sheet E1 / DT 900 PRO X (08.21)

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.

Rated total harmonic distortion

Beyerdynamic DT 900 PRO X0.80% at 100 Hz, 0.05% at 500 Hz, 0.04% at 1 kHz (at 1 mW)

Beyerdynamic DT 990 PRO 250 ohm<0.2%

Sources

Beyerdynamic DT 900 PRO X

Manufacturer specification

beyerdynamic DT 900 PRO X — spec sheet E1 / DT 900 PRO X (08.21)

Beyerdynamic DT 990 PRO 250 ohm

Manufacturer specification

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

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

Earpads

Beyerdynamic DT 900 PRO XVelour, replaceable; headband pad also replaceable

Beyerdynamic DT 990 PRO 250 ohmVelour, circumaural, replaceable (spare part EDT 990 V)

Sources

Beyerdynamic DT 900 PRO X

Manufacturer specification

beyerdynamic DT 900 PRO X — official product page and technical data (global store)beyerdynamic DT 900 PRO X — spec sheet E1 / DT 900 PRO X (08.21)

Beyerdynamic DT 990 PRO 250 ohm

Manufacturer specification

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.

Show 7 more verified differences

Rated frequency range

Beyerdynamic DT 900 PRO X5–40,000 Hz

Beyerdynamic DT 990 PRO 250 ohm5–35,000 Hz

Sources

Beyerdynamic DT 900 PRO X

Manufacturer specification

beyerdynamic DT 900 PRO X — official product page and technical data (global store)beyerdynamic DT 900 PRO X — spec sheet E1 / DT 900 PRO X (08.21)

Beyerdynamic DT 990 PRO 250 ohm

Manufacturer specification

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)

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

Headband pressure

Beyerdynamic DT 900 PRO X5.3 N

Beyerdynamic DT 990 PRO 250 ohmApprox. 3.5–5.5 N

Sources

Beyerdynamic DT 900 PRO X

Manufacturer specification

beyerdynamic DT 900 PRO X — spec sheet E1 / DT 900 PRO X (08.21)

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)

Check the exact configuration and source conditions for your use.

HEADPHONE LAB software

Beyerdynamic DT 900 PRO XSupported through a separate DAW plug-in, with individual factory calibration

Beyerdynamic DT 990 PRO 250 ohmSupported through a separate DAW plug-in

Sources

Beyerdynamic DT 900 PRO X

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 lists the DT 900 PRO X among the models offered FACTORY CALIBRATION, based on the production measurement data of the individual unit.

beyerdynamic DT 900 PRO X — official product page and technical data (global store)beyerdynamic HEADPHONE LAB — plug-in features, formats and FACTORY CALIBRATION model list

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

Check the exact configuration and source conditions for your use.

Maximum input power

Beyerdynamic DT 900 PRO X100 mW short-term; 30 mW rated continuous

Beyerdynamic DT 990 PRO 250 ohm100 mW

Sources

Beyerdynamic DT 900 PRO X

Manufacturer specification

beyerdynamic DT 900 PRO X — spec sheet E1 / DT 900 PRO X (08.21)

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.

Rated sensitivity

Beyerdynamic DT 900 PRO X100 dB SPL at 1 mW / 500 Hz; 114 dB SPL at 1 V / 500 Hz

Beyerdynamic DT 990 PRO 250 ohm96 dB nominal SPL

Sources

Beyerdynamic DT 900 PRO X

Manufacturer specification · Two references are given: per 1 mW and per 1 V, both at 500 Hz.

beyerdynamic DT 900 PRO X — official product page and technical data (global store)beyerdynamic DT 900 PRO X — spec sheet E1 / DT 900 PRO X (08.21)

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.

Serviceability

Beyerdynamic DT 900 PRO XNearly all components replaceable, including ear pads and headband pad

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 900 PRO X

Manufacturer specification · Product page (Sustainability): 'If required, nearly all the headphones’ components can be replaced'. The spec sheet lists 'Soft, replaceable ear pads and headband pad' and states that the detachable mini-XLR cable can be replaced by cables of different lengths and connection options.

beyerdynamic DT 900 PRO X — official product page and technical data (global store)beyerdynamic DT 900 PRO X — spec sheet E1 / DT 900 PRO X (08.21)

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.

Weight without cable

Beyerdynamic DT 900 PRO X345 g

Beyerdynamic DT 990 PRO 250 ohm250 g

Sources

Beyerdynamic DT 900 PRO X

Manufacturer specification · Headphones without cable.

beyerdynamic DT 900 PRO X — official product page and technical data (global store)beyerdynamic DT 900 PRO X — official North America store page and technical data beyerdynamic DT 900 PRO X — spec sheet E1 / DT 900 PRO X (08.21)

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

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

Missing or non-comparable evidence (3)

Frequency characteristic

Beyerdynamic DT 900 PRO XNot verified

Beyerdynamic DT 990 PRO 250 ohmDiffuse-field

Sources

Beyerdynamic DT 900 PRO X

No source recorded for this side.

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)

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

In the box

Beyerdynamic DT 900 PRO XHeadphones, 3 m straight mini-XLR cable, 1.8 m straight mini-XLR cable (each with 3.5 mm jack and 6.35 mm adapter), bag

Beyerdynamic DT 990 PRO 250 ohmNot verified

Sources

Beyerdynamic DT 900 PRO X

Manufacturer specification

beyerdynamic DT 900 PRO X — spec sheet E1 / DT 900 PRO X (08.21)

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.

Weight including cable

Beyerdynamic DT 900 PRO XNot verified

Beyerdynamic DT 990 PRO 250 ohm375 g

Sources

Beyerdynamic DT 900 PRO X

No source recorded for this side.

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.

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

6 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 900 PRO X

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 900 PRO X

What it brings

A 48-ohm nominal impedance and a rated 100 dB SPL at 1 mW mean it is specified for use with laptops, tablets and phones as well as studio interfaces.
Manufacturer source Manufacturer source
The single-sided cable detaches at a mini-XLR connector and can be replaced by cables of different lengths and connection options; the ear pads and headband pad are also replaceable.
Manufacturer source Manufacturer source

What to check

It is an open-back design (beyerdynamic's operating principle: open) with no active noise cancellation, and neither the product page nor the spec sheet gives an ambient-noise attenuation rating.
Manufacturer source Manufacturer source
There is no microphone or inline remote; the supplied cables are audio-only stereo leads.
Manufacturer source Manufacturer source

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

Differences only

22 of 22 specifications Sources in each row

Source-backed specifications for Beyerdynamic DT 900 PRO X and Beyerdynamic DT 990 PRO 250 ohm
Specification	Beyerdynamic DT 900 PRO X	Beyerdynamic DT 990 PRO 250 ohm

Wearing style Sources Beyerdynamic DT 900 PRO X Manufacturer specification beyerdynamic DT 900 PRO X — official product page and technical data (global store)beyerdynamic DT 900 PRO X — spec sheet E1 / DT 900 PRO X (08.21) Beyerdynamic DT 990 PRO 250 ohm Manufacturer specification 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)	Over-ear (circumaural), open-back wired studio headphones	Over-ear (circumaural), open-back wired studio headphones
Weight without cableDifferent Sources Beyerdynamic DT 900 PRO X Manufacturer specification · Headphones without cable. beyerdynamic DT 900 PRO X — official product page and technical data (global store)beyerdynamic DT 900 PRO X — official North America store page and technical data beyerdynamic DT 900 PRO X — spec sheet E1 / DT 900 PRO X (08.21) 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 data beyerdynamic DT 990 PRO — spec sheet E1/DT 990 PRO (08.22)	345 g	250 g
Acoustic design Sources Beyerdynamic DT 900 PRO X Manufacturer specification beyerdynamic DT 900 PRO X — official product page and technical data (global store)beyerdynamic DT 900 PRO X — spec sheet E1 / DT 900 PRO X (08.21) Beyerdynamic DT 990 PRO 250 ohm Manufacturer specification 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)	Open-back	Open-back
Headband pressureDifferent Sources Beyerdynamic DT 900 PRO X Manufacturer specification beyerdynamic DT 900 PRO X — spec sheet E1 / DT 900 PRO X (08.21) 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)	5.3 N	Approx. 3.5–5.5 N
EarpadsDifferent Sources Beyerdynamic DT 900 PRO X Manufacturer specification beyerdynamic DT 900 PRO X — official product page and technical data (global store)beyerdynamic DT 900 PRO X — spec sheet E1 / DT 900 PRO X (08.21) Beyerdynamic DT 990 PRO 250 ohm Manufacturer specification 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)	Velour, replaceable; headband pad also replaceable	Velour, circumaural, replaceable (spare part EDT 990 V)
ServiceabilityDifferent Sources Beyerdynamic DT 900 PRO X Manufacturer specification · Product page (Sustainability): 'If required, nearly all the headphones’ components can be replaced'. The spec sheet lists 'Soft, replaceable ear pads and headband pad' and states that the detachable mini-XLR cable can be replaced by cables of different lengths and connection options. beyerdynamic DT 900 PRO X — official product page and technical data (global store)beyerdynamic DT 900 PRO X — spec sheet E1 / DT 900 PRO X (08.21) 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)	Nearly all components replaceable, including ear pads and headband pad	Every part serviceable; ear pads (EDT 990 V) and headband pad (BN 59-53/D) listed as replacement parts
Weight including cable Sources Beyerdynamic DT 900 PRO X No source recorded. 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 data beyerdynamic DT 990 PRO — spec sheet E1/DT 990 PRO (08.22)	Not provided	375 g

Wired / wireless connectionsDifferent Sources Beyerdynamic DT 900 PRO X Manufacturer specification beyerdynamic DT 900 PRO X — official product page and technical data (global store)beyerdynamic DT 900 PRO X — spec sheet E1 / DT 900 PRO X (08.21) 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; detachable single-sided cable with 3-pin mini-XLR at the headphone and 3.5 mm stereo jack with 6.35 mm (1/4-inch) adapter	Wired; 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 900 PRO X Manufacturer specification · Passive headphones with no battery or charging. beyerdynamic DT 900 PRO X — official product page and technical data (global store)beyerdynamic DT 900 PRO X — spec sheet E1 / DT 900 PRO X (08.21) 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 required: passive wired headphones powered by the audio source	Not required: passive wired headphones powered by the audio source
Cable length Sources Beyerdynamic DT 900 PRO X Manufacturer specification · Longest supplied cable; a second 1.8 m straight cable is also included. beyerdynamic DT 900 PRO X — official product page and technical data (global store)beyerdynamic DT 900 PRO X — spec sheet E1 / DT 900 PRO X (08.21) 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 m	3 m
Supplied plug and adapterDifferent Sources Beyerdynamic DT 900 PRO X Manufacturer specification beyerdynamic DT 900 PRO X — spec sheet E1 / DT 900 PRO X (08.21) Beyerdynamic DT 990 PRO 250 ohm Manufacturer specification beyerdynamic DT 990 PRO — spec sheet E1/DT 990 PRO (08.22)	3-pin mini-XLR (headphone end); gold-plated 3.5 mm stereo jack with 6.35 mm (1/4-inch) adapter	Gold-plated 3.5 mm stereo mini-jack with 6.35 mm (1/4-inch) adapter

Driver constructionDifferent Sources Beyerdynamic DT 900 PRO X Manufacturer specification · beyerdynamic's driver name; a diameter is not stated in the sources read. beyerdynamic DT 900 PRO X — spec sheet E1 / DT 900 PRO X (08.21) 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 STELLAR.45 driver	Dynamic
Nominal impedanceDifferent Sources Beyerdynamic DT 900 PRO X Manufacturer specification beyerdynamic DT 900 PRO X — official product page and technical data (global store)beyerdynamic DT 900 PRO X — spec sheet E1 / DT 900 PRO X (08.21) 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)	48 ohm	250 ohm
Rated frequency rangeDifferent Sources Beyerdynamic DT 900 PRO X Manufacturer specification beyerdynamic DT 900 PRO X — official product page and technical data (global store)beyerdynamic DT 900 PRO X — spec sheet E1 / DT 900 PRO X (08.21) Beyerdynamic DT 990 PRO 250 ohm Manufacturer specification 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)	5–40,000 Hz	5–35,000 Hz
Rated sensitivityDifferent Sources Beyerdynamic DT 900 PRO X Manufacturer specification · Two references are given: per 1 mW and per 1 V, both at 500 Hz. beyerdynamic DT 900 PRO X — official product page and technical data (global store)beyerdynamic DT 900 PRO X — spec sheet E1 / DT 900 PRO X (08.21) 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)	100 dB SPL at 1 mW / 500 Hz; 114 dB SPL at 1 V / 500 Hz	96 dB nominal SPL
Rated total harmonic distortionDifferent Sources Beyerdynamic DT 900 PRO X Manufacturer specification beyerdynamic DT 900 PRO X — spec sheet E1 / DT 900 PRO X (08.21) Beyerdynamic DT 990 PRO 250 ohm Manufacturer specification beyerdynamic DT 990 PRO — spec sheet E1/DT 990 PRO (08.22)	0.80% at 100 Hz, 0.05% at 500 Hz, 0.04% at 1 kHz (at 1 mW)	<0.2%
Maximum input powerDifferent Sources Beyerdynamic DT 900 PRO X Manufacturer specification beyerdynamic DT 900 PRO X — spec sheet E1 / DT 900 PRO X (08.21) Beyerdynamic DT 990 PRO 250 ohm Manufacturer specification beyerdynamic DT 990 PRO — spec sheet E1/DT 990 PRO (08.22)	100 mW short-term; 30 mW rated continuous	100 mW
Frequency characteristic Sources Beyerdynamic DT 900 PRO X No source recorded. 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)	Not provided	Diffuse-field

Microphone Sources Beyerdynamic DT 900 PRO X Manufacturer specification · Supplied cables end in a stereo headphone jack; no microphone is listed. beyerdynamic DT 900 PRO X — official product page and technical data (global store)beyerdynamic DT 900 PRO X — spec sheet E1 / DT 900 PRO X (08.21) 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)	No	No
Active noise cancellation Sources Beyerdynamic DT 900 PRO X Manufacturer specification · Passive, open-back design; no active noise cancellation is listed. beyerdynamic DT 900 PRO X — official product page and technical data (global store) 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)	No	No

HEADPHONE LAB softwareDifferent Sources Beyerdynamic DT 900 PRO X 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 lists the DT 900 PRO X among the models offered FACTORY CALIBRATION, based on the production measurement data of the individual unit. beyerdynamic DT 900 PRO X — official product page and technical data (global store)beyerdynamic HEADPHONE LAB — plug-in features, formats and FACTORY CALIBRATION model list 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-in, with individual factory calibration	Supported through a separate DAW plug-in

In the box Sources Beyerdynamic DT 900 PRO X Manufacturer specification beyerdynamic DT 900 PRO X — spec sheet E1 / DT 900 PRO X (08.21) Beyerdynamic DT 990 PRO 250 ohm No source recorded.	Headphones, 3 m straight mini-XLR cable, 1.8 m straight mini-XLR cable (each with 3.5 mm jack and 6.35 mm adapter), bag	Not provided

First product manufacturer source Second 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.