HEADPHONES · YOUR NEXT FACE-OFF

Beyerdynamic DT 1990 PRO MKII vs Beyerdynamic DT 900 PRO X

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

Compared products

YOUR FIRST CHOICE

Beyerdynamic DT 1990 PRO MKII

1000303 · 30 ohm · black

Full product profile Official image

Exact model & source notes

The DT 1990 PRO MKII (article 1000303, black) is the second generation of beyerdynamic's open-back, around-ear studio headphone, with 45 mm TESLA.45 dynamic drivers at 30 ohms and a detachable, lockable mini-XLR cable. A spring-steel headband carries a headband pad with a fontanelle recess for pressure relief. It ships with two ear-pad sets tuned differently, two cables and a hard case, and 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 1990 PRO MKII for

Lower stated nominal impedance: 30 ohm vs 48 ohm

Choose the DT 900 PRO X for

Higher stated nominal impedance: 48 ohm vs 30 ohm

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

See the 9 verified differences

THE CONTENDER

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

DT 1990 PRO MKII UK & US retailers

UK & US price history: no verified listing yet

DT 900 PRO X 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 1990 PRO MKII30 Ω

Source 1 Source 2

Beyerdynamic DT 900 PRO X48 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 ↓

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

Wired / wireless connections

Beyerdynamic DT 1990 PRO MKIIWired; detachable, lockable 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 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

Sources

Beyerdynamic DT 1990 PRO MKII

Manufacturer specification · The product page's technical table words the plug as '3-pin XLR plug, 6.35 mm (1/4") stereo jack plug'; the spec sheet specifies a 3-pin mini-XLR cable connector at the headphone and a 3.5 mm jack with 6.35 mm adapter.

beyerdynamic DT 1990 PRO MKII — official product page and technical data (global store)beyerdynamic DT 1990 PRO MKII — spec sheet E1/DT 1990 PRO MKII (10.24)

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)

Check the exact configuration and source conditions for your use.

Nominal impedance

In Visual facts

Beyerdynamic DT 1990 PRO MKII30 ohm

Beyerdynamic DT 900 PRO X48 ohm

Sources

Beyerdynamic DT 1990 PRO MKII

Manufacturer specification

beyerdynamic DT 1990 PRO MKII — official product page and technical data (global store)beyerdynamic DT 1990 PRO MKII — spec sheet E1/DT 1990 PRO MKII (10.24)

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)

Check the exact configuration and source conditions for your use.

Driver construction

Beyerdynamic DT 1990 PRO MKIIDynamic TESLA.45 drivers, 45 mm diameter, PEEK polymer diaphragm

Beyerdynamic DT 900 PRO XDynamic STELLAR.45 driver

Sources

Beyerdynamic DT 1990 PRO MKII

Manufacturer specification · beyerdynamic states the headphones are equipped with two TESLA.45 drivers, each measuring 45 mm in diameter, and that the diaphragm is made of PEEK polymer (product page FAQ). The spec sheet gives the transducer type as dynamic.

beyerdynamic DT 1990 PRO MKII — official product page and technical data (global store)beyerdynamic DT 1990 PRO MKII — spec sheet E1/DT 1990 PRO MKII (10.24)

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)

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

Rated total harmonic distortion

Beyerdynamic DT 1990 PRO MKII0.20% at 100 Hz, 0.06% at 500 Hz, 0.08% at 1 kHz (at 1 mW)

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

Sources

Beyerdynamic DT 1990 PRO MKII

Manufacturer specification

beyerdynamic DT 1990 PRO MKII — spec sheet E1/DT 1990 PRO MKII (10.24)

Beyerdynamic DT 900 PRO X

Manufacturer specification

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

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

Nominal headband pressure

Beyerdynamic DT 1990 PRO MKII6 ±0.5 N

Beyerdynamic DT 900 PRO X5.3 N

Sources

Beyerdynamic DT 1990 PRO MKII

Manufacturer specification

beyerdynamic DT 1990 PRO MKII — spec sheet E1/DT 1990 PRO MKII (10.24)

Beyerdynamic DT 900 PRO X

Manufacturer specification

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

Check the exact configuration and source conditions for your use.

In the box

Beyerdynamic DT 1990 PRO MKIIHeadphones, 'Producing' velour ear pad set (slight bass boost), 'Mixing & Mastering' velour ear pad set (linear), 3 m straight cable, 5 m coiled cable, hard case

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

Sources

Beyerdynamic DT 1990 PRO MKII

Manufacturer specification

beyerdynamic DT 1990 PRO MKII — spec sheet E1/DT 1990 PRO MKII (10.24)

Beyerdynamic DT 900 PRO X

Manufacturer specification

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

Check the exact configuration and source conditions for your use.

Show 3 more verified differences

Rated sensitivity

Beyerdynamic DT 1990 PRO MKII94 dB SPL at 1 mW / 500 Hz; 110 dB SPL at 1 V / 500 Hz

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

Sources

Beyerdynamic DT 1990 PRO MKII

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

beyerdynamic DT 1990 PRO MKII — official product page and technical data (global store)beyerdynamic DT 1990 PRO MKII — spec sheet E1/DT 1990 PRO MKII (10.24)

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)

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 1990 PRO MKIIAlmost every part replaceable, including the headband and ear pads

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

Sources

Beyerdynamic DT 1990 PRO MKII

Manufacturer specification · beyerdynamic's product page states that almost every part of the headphones can be replaced and that the headband and ear pads can be replaced if necessary; the spec sheet words it more broadly: 'All components can be replaced'.

beyerdynamic DT 1990 PRO MKII — official product page and technical data (global store)beyerdynamic DT 1990 PRO MKII — spec sheet E1/DT 1990 PRO MKII (10.24)

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)

Check the exact configuration and source conditions for your use.

Weight without cable

Beyerdynamic DT 1990 PRO MKII376 g

Beyerdynamic DT 900 PRO X345 g

Sources

Beyerdynamic DT 1990 PRO MKII

Manufacturer specification · Headphones without cable.

beyerdynamic DT 1990 PRO MKII — official product page and technical data (global store)beyerdynamic DT 1990 PRO MKII — official North America store page and technical data beyerdynamic DT 1990 PRO MKII — spec sheet E1/DT 1990 PRO MKII (10.24)

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)

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

Missing or non-comparable evidence (8)

Active noise cancellation

Beyerdynamic DT 1990 PRO MKIINot verified

Beyerdynamic DT 900 PRO XNo

Sources

Beyerdynamic DT 1990 PRO MKII

The complete exact sources establish an open dynamic wired design but do not explicitly negate active noise cancellation. Open construction and omission of ANC do not establish a false capability. · Manufacturer specification

beyerdynamic DT 1990 PRO MKII — official product page and technical data (global store)beyerdynamic DT 1990 PRO MKII — spec sheet E1/DT 1990 PRO MKII (10.24)

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)

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

Microphone

In Visual facts

Beyerdynamic DT 1990 PRO MKIINot verified

Beyerdynamic DT 900 PRO XNo

Sources

Beyerdynamic DT 1990 PRO MKII

The complete exact sources list the headphone and accessories but do not explicitly establish absence of a microphone. An omitted microphone and a stereo headphone plug alone cannot become a sourced false capability. · Manufacturer specification

beyerdynamic DT 1990 PRO MKII — official product page and technical data (global store)beyerdynamic DT 1990 PRO MKII — spec sheet E1/DT 1990 PRO MKII (10.24)

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)

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

Battery life

Beyerdynamic DT 1990 PRO MKIINot verified

Beyerdynamic DT 900 PRO XNot required: passive wired headphones powered by the audio source

Sources

Beyerdynamic DT 1990 PRO MKII

The retained exact sources do not explicitly establish battery life or that no battery is required for operation. Do not infer a not-applicable operating requirement from analogue/dynamic construction or a battery-included No row. · Manufacturer specification

beyerdynamic DT 1990 PRO MKII — official product page and technical data (global store)beyerdynamic DT 1990 PRO MKII — spec sheet E1/DT 1990 PRO MKII (10.24)

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)

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

Coiled cable length, stretched

Beyerdynamic DT 1990 PRO MKII5 m

Beyerdynamic DT 900 PRO XNot verified

Sources

Beyerdynamic DT 1990 PRO MKII

Manufacturer specification · Separate supplied coiled cable; 5 m is explicitly measured stretched. A 3 m straight cable is also supplied.

beyerdynamic DT 1990 PRO MKII — official product page and technical data (global store)beyerdynamic DT 1990 PRO MKII — spec sheet E1/DT 1990 PRO MKII (10.24)

Beyerdynamic DT 900 PRO X

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 1990 PRO MKII45 mm

Beyerdynamic DT 900 PRO XNot verified

Sources

Beyerdynamic DT 1990 PRO MKII

Manufacturer specification · Diameter of each TESLA.45 driver as stated on the product page.

beyerdynamic DT 1990 PRO MKII — official product page and technical data (global store)

Beyerdynamic DT 900 PRO X

No source recorded for this side.

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

Earpads

Beyerdynamic DT 1990 PRO MKIINot verified

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

Sources

Beyerdynamic DT 1990 PRO MKII

No source recorded for this side.

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)

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

Construction

Beyerdynamic DT 1990 PRO MKIIRugged spring-steel headband; headband pad of soft memory foam and leatherette with fontanelle recess for pressure relief

Beyerdynamic DT 900 PRO XNot verified

Sources

Beyerdynamic DT 1990 PRO MKII

Manufacturer specification · Spec sheet features: 'Rugged spring steel headband construction' and 'Headband pad with fontanelle recess for pressure relief'. The product page highlights 'High wearing comfort thanks to fontanelle recess', describes the headband as soft memory foam and durable leatherette, and states that the fontanelle recess avoids potentially pain-sensitive areas on the head.

beyerdynamic DT 1990 PRO MKII — official product page and technical data (global store)beyerdynamic DT 1990 PRO MKII — spec sheet E1/DT 1990 PRO MKII (10.24)

Beyerdynamic DT 900 PRO X

No source recorded for this side.

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

Maximum input power

Beyerdynamic DT 1990 PRO MKII100 mW short-term; 30 mW continuous

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

Sources

Beyerdynamic DT 1990 PRO MKII

Manufacturer specification

beyerdynamic DT 1990 PRO MKII — spec sheet E1/DT 1990 PRO MKII (10.24)

Beyerdynamic DT 900 PRO X

Manufacturer specification

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

One source states less detail or a rounded figure. This is not a verified difference; check the exact configuration.

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 1990 PRO MKII

Select a feature to check your fit.

YOUR CHOICE

Beyerdynamic DT 900 PRO X

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 1990 PRO MKII

What it brings

Two velour ear-pad sets are supplied: 'Producing' with a slight bass boost and 'Mixing & Mastering' for a linear response, so the tuning can be changed by swapping pads.
Manufacturer source
beyerdynamic states that almost every part of the headphones can be replaced, including the headband and ear pads, and the single-sided mini-XLR cable is detachable and can be locked.
Manufacturer source Manufacturer source

What to check

beyerdynamic rates it at 376 g without cable and a nominal headband pressure of 6 ±0.5 N; anyone sensitive to weight or clamping force over long sessions should weigh these figures.
Manufacturer source Manufacturer source
The supplied analogue cables use a 3.5 mm stereo plug with a 6.35 mm adapter.
Manufacturer source Manufacturer source

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

COMPARE THE DETAILS

Full specifications

How we verify

Differences only

23 of 23 specifications Sources in each row

Source-backed specifications for Beyerdynamic DT 1990 PRO MKII and Beyerdynamic DT 900 PRO X
Specification	Beyerdynamic DT 1990 PRO MKII	Beyerdynamic DT 900 PRO X

Wearing style Sources Beyerdynamic DT 1990 PRO MKII Manufacturer specification beyerdynamic DT 1990 PRO MKII — official product page and technical data (global store)beyerdynamic DT 1990 PRO MKII — spec sheet E1/DT 1990 PRO MKII (10.24) 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)	Over-ear (circumaural), open-back wired studio headphones	Over-ear (circumaural), open-back wired studio headphones
Weight without cableDifferent Sources Beyerdynamic DT 1990 PRO MKII Manufacturer specification · Headphones without cable. beyerdynamic DT 1990 PRO MKII — official product page and technical data (global store)beyerdynamic DT 1990 PRO MKII — official North America store page and technical data beyerdynamic DT 1990 PRO MKII — spec sheet E1/DT 1990 PRO MKII (10.24) 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)	376 g	345 g
Acoustic design Sources Beyerdynamic DT 1990 PRO MKII Manufacturer specification beyerdynamic DT 1990 PRO MKII — official product page and technical data (global store)beyerdynamic DT 1990 PRO MKII — spec sheet E1/DT 1990 PRO MKII (10.24) 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)	Open-back	Open-back
Nominal headband pressureDifferent Sources Beyerdynamic DT 1990 PRO MKII Manufacturer specification beyerdynamic DT 1990 PRO MKII — spec sheet E1/DT 1990 PRO MKII (10.24) Beyerdynamic DT 900 PRO X Manufacturer specification beyerdynamic DT 900 PRO X — spec sheet E1 / DT 900 PRO X (08.21)	6 ±0.5 N	5.3 N
ServiceabilityDifferent Sources Beyerdynamic DT 1990 PRO MKII Manufacturer specification · beyerdynamic's product page states that almost every part of the headphones can be replaced and that the headband and ear pads can be replaced if necessary; the spec sheet words it more broadly: 'All components can be replaced'. beyerdynamic DT 1990 PRO MKII — official product page and technical data (global store)beyerdynamic DT 1990 PRO MKII — spec sheet E1/DT 1990 PRO MKII (10.24) 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)	Almost every part replaceable, including the headband and ear pads	Nearly all components replaceable, including ear pads and headband pad
Construction Sources Beyerdynamic DT 1990 PRO MKII Manufacturer specification · Spec sheet features: 'Rugged spring steel headband construction' and 'Headband pad with fontanelle recess for pressure relief'. The product page highlights 'High wearing comfort thanks to fontanelle recess', describes the headband as soft memory foam and durable leatherette, and states that the fontanelle recess avoids potentially pain-sensitive areas on the head. beyerdynamic DT 1990 PRO MKII — official product page and technical data (global store)beyerdynamic DT 1990 PRO MKII — spec sheet E1/DT 1990 PRO MKII (10.24) Beyerdynamic DT 900 PRO X No source recorded.	Rugged spring-steel headband; headband pad of soft memory foam and leatherette with fontanelle recess for pressure relief	Not provided
Earpads Sources Beyerdynamic DT 1990 PRO MKII No source recorded. 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)	Not provided	Velour, replaceable; headband pad also replaceable

Wired / wireless connectionsDifferent Sources Beyerdynamic DT 1990 PRO MKII Manufacturer specification · The product page's technical table words the plug as '3-pin XLR plug, 6.35 mm (1/4") stereo jack plug'; the spec sheet specifies a 3-pin mini-XLR cable connector at the headphone and a 3.5 mm jack with 6.35 mm adapter. beyerdynamic DT 1990 PRO MKII — official product page and technical data (global store)beyerdynamic DT 1990 PRO MKII — spec sheet E1/DT 1990 PRO MKII (10.24) 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)	Wired; detachable, lockable 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; 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
Battery life Sources Beyerdynamic DT 1990 PRO MKII The retained exact sources do not explicitly establish battery life or that no battery is required for operation. Do not infer a not-applicable operating requirement from analogue/dynamic construction or a battery-included No row. · Manufacturer specification beyerdynamic DT 1990 PRO MKII — official product page and technical data (global store)beyerdynamic DT 1990 PRO MKII — spec sheet E1/DT 1990 PRO MKII (10.24) 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)	Not listed by the manufacturer	Not required: passive wired headphones powered by the audio source
Cable length Sources Beyerdynamic DT 1990 PRO MKII Manufacturer specification · Supplied straight cable. A separate 5 m coiled cable is also supplied; its 5 m rating is explicitly stretched, not a relaxed straight-cable length. beyerdynamic DT 1990 PRO MKII — official product page and technical data (global store)beyerdynamic DT 1990 PRO MKII — spec sheet E1/DT 1990 PRO MKII (10.24) 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)	3 m	3 m
Supplied plug and adapter Sources Beyerdynamic DT 1990 PRO MKII Manufacturer specification beyerdynamic DT 1990 PRO MKII — spec sheet E1/DT 1990 PRO MKII (10.24) Beyerdynamic DT 900 PRO X Manufacturer specification beyerdynamic DT 900 PRO X — spec sheet E1 / DT 900 PRO X (08.21)	3-pin mini-XLR (headphone end); gold-plated 3.5 mm stereo jack with 6.35 mm (1/4-inch) adapter	3-pin mini-XLR (headphone end); gold-plated 3.5 mm stereo jack with 6.35 mm (1/4-inch) adapter
Coiled cable length, stretched Sources Beyerdynamic DT 1990 PRO MKII Manufacturer specification · Separate supplied coiled cable; 5 m is explicitly measured stretched. A 3 m straight cable is also supplied. beyerdynamic DT 1990 PRO MKII — official product page and technical data (global store)beyerdynamic DT 1990 PRO MKII — spec sheet E1/DT 1990 PRO MKII (10.24) Beyerdynamic DT 900 PRO X No source recorded.	5 m	Not provided

Driver constructionDifferent Sources Beyerdynamic DT 1990 PRO MKII Manufacturer specification · beyerdynamic states the headphones are equipped with two TESLA.45 drivers, each measuring 45 mm in diameter, and that the diaphragm is made of PEEK polymer (product page FAQ). The spec sheet gives the transducer type as dynamic. beyerdynamic DT 1990 PRO MKII — official product page and technical data (global store)beyerdynamic DT 1990 PRO MKII — spec sheet E1/DT 1990 PRO MKII (10.24) 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)	Dynamic TESLA.45 drivers, 45 mm diameter, PEEK polymer diaphragm	Dynamic STELLAR.45 driver
Driver diameter Sources Beyerdynamic DT 1990 PRO MKII Manufacturer specification · Diameter of each TESLA.45 driver as stated on the product page. beyerdynamic DT 1990 PRO MKII — official product page and technical data (global store) Beyerdynamic DT 900 PRO X No source recorded.	45 mm	Not provided
Nominal impedanceDifferent Sources Beyerdynamic DT 1990 PRO MKII Manufacturer specification beyerdynamic DT 1990 PRO MKII — official product page and technical data (global store)beyerdynamic DT 1990 PRO MKII — spec sheet E1/DT 1990 PRO MKII (10.24) 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)	30 ohm	48 ohm
Rated frequency range Sources Beyerdynamic DT 1990 PRO MKII Manufacturer specification beyerdynamic DT 1990 PRO MKII — official product page and technical data (global store)beyerdynamic DT 1990 PRO MKII — spec sheet E1/DT 1990 PRO MKII (10.24) 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)	5–40,000 Hz	5–40,000 Hz
Rated sensitivityDifferent Sources Beyerdynamic DT 1990 PRO MKII Manufacturer specification · Two references are given: per 1 mW and per 1 V, both at 500 Hz. beyerdynamic DT 1990 PRO MKII — official product page and technical data (global store)beyerdynamic DT 1990 PRO MKII — spec sheet E1/DT 1990 PRO MKII (10.24) 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)	94 dB SPL at 1 mW / 500 Hz; 110 dB SPL at 1 V / 500 Hz	100 dB SPL at 1 mW / 500 Hz; 114 dB SPL at 1 V / 500 Hz
Rated total harmonic distortionDifferent Sources Beyerdynamic DT 1990 PRO MKII Manufacturer specification beyerdynamic DT 1990 PRO MKII — spec sheet E1/DT 1990 PRO MKII (10.24) Beyerdynamic DT 900 PRO X Manufacturer specification beyerdynamic DT 900 PRO X — spec sheet E1 / DT 900 PRO X (08.21)	0.20% at 100 Hz, 0.06% at 500 Hz, 0.08% at 1 kHz (at 1 mW)	0.80% at 100 Hz, 0.05% at 500 Hz, 0.04% at 1 kHz (at 1 mW)
Maximum input power Sources Beyerdynamic DT 1990 PRO MKII Manufacturer specification beyerdynamic DT 1990 PRO MKII — spec sheet E1/DT 1990 PRO MKII (10.24) Beyerdynamic DT 900 PRO X Manufacturer specification beyerdynamic DT 900 PRO X — spec sheet E1 / DT 900 PRO X (08.21)	100 mW short-term; 30 mW continuous	100 mW short-term; 30 mW rated continuous

Microphone Sources Beyerdynamic DT 1990 PRO MKII The complete exact sources list the headphone and accessories but do not explicitly establish absence of a microphone. An omitted microphone and a stereo headphone plug alone cannot become a sourced false capability. · Manufacturer specification beyerdynamic DT 1990 PRO MKII — official product page and technical data (global store)beyerdynamic DT 1990 PRO MKII — spec sheet E1/DT 1990 PRO MKII (10.24) 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)	Not listed by the manufacturer	No
Active noise cancellation Sources Beyerdynamic DT 1990 PRO MKII The complete exact sources establish an open dynamic wired design but do not explicitly negate active noise cancellation. Open construction and omission of ANC do not establish a false capability. · Manufacturer specification beyerdynamic DT 1990 PRO MKII — official product page and technical data (global store)beyerdynamic DT 1990 PRO MKII — spec sheet E1/DT 1990 PRO MKII (10.24) 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)	Not listed by the manufacturer	No

HEADPHONE LAB software Sources Beyerdynamic DT 1990 PRO MKII 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 1990 PRO MKII among the models offered FACTORY CALIBRATION, based on the production measurement data of the individual unit. beyerdynamic DT 1990 PRO MKII — official product page and technical data (global store)beyerdynamic HEADPHONE LAB — plug-in features, formats and FACTORY CALIBRATION model list 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	Supported through a separate DAW plug-in, with individual factory calibration	Supported through a separate DAW plug-in, with individual factory calibration

In the boxDifferent Sources Beyerdynamic DT 1990 PRO MKII Manufacturer specification beyerdynamic DT 1990 PRO MKII — spec sheet E1/DT 1990 PRO MKII (10.24) Beyerdynamic DT 900 PRO X Manufacturer specification beyerdynamic DT 900 PRO X — spec sheet E1 / DT 900 PRO X (08.21)	Headphones, 'Producing' velour ear pad set (slight bass boost), 'Mixing & Mastering' velour ear pad set (linear), 3 m straight cable, 5 m coiled cable, hard case	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

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.