HEADPHONES · YOUR NEXT FACE-OFF

Beyerdynamic DT 990 PRO 250 ohm vs Sennheiser HD 650

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

Compared products

YOUR FIRST CHOICE

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

WHICH SUITS YOU?

Choose the Beyerdynamic DT 990 PRO 250 ohm for

Lower stated nominal impedance: 250 ohm vs 300 ohm

Choose the Sennheiser HD 650 for

Higher stated nominal impedance: 300 ohm vs 250 ohm

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

See the 10 verified differences

THE CONTENDER

Sennheiser HD 650

508825 · titanium-silver · 300 ohm · standard 3 m unbalanced cable

Full product profile Official image

Exact model & source notes

The HD 650 is an open-back, over-ear headphone with a 42 mm dynamic driver rated 10–41,000 Hz (−10 dB) at 300 ohms. It comes with a detachable 3 m 6.35 mm cable and a 3.5 mm adapter; balanced cables are optional extras.

Specifications checked 11 Sept 2026.

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

Manufacturer specifications

Beyerdynamic DT 990 PRO 250 ohm UK & US retailers

UK & US price history: no verified listing yet

Sennheiser HD 650 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 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

Sennheiser HD 650300 Ω

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

Source 1

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. 1 feature is the same under different published names, grouped below. Missing information stays separate.

Wired / wireless connections

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

Sennheiser HD 650Wired analogue; detachable 6.35 mm unbalanced cable and included 3.5 mm 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)

Sennheiser HD 650

Manufacturer specification · Optional 4.4 mm and XLR-4 balanced cables are sold separately.

Sennheiser HD 650 — manufacturer specifications Sennheiser HD 650 — exact UK article and product details

Check the exact configuration and source conditions for your use.

Nominal impedance

In Visual facts

Beyerdynamic DT 990 PRO 250 ohm250 ohm

Sennheiser HD 650300 ohm

Sources

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)

Sennheiser HD 650

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

Sennheiser HD 650 — exact UK article and product details

Check the exact configuration and source conditions for your use.

Driver construction

Beyerdynamic DT 990 PRO 250 ohmDynamic

Sennheiser HD 65042 mm dynamic transducer with 38 mm diaphragm and aluminium voice coil; acoustic mesh and hand-paired transducers within stated ±1 dB tolerance

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)

Sennheiser HD 650

Manufacturer specification · The driver, diaphragm and voice-coil sizes describe different parts.

Sennheiser HD 650 — manufacturer specifications Sennheiser HD 650 — exact UK article and product details

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 990 PRO 250 ohmGold-plated 3.5 mm stereo mini-jack with 6.35 mm (1/4-inch) adapter

Sennheiser HD 6506.35 mm unbalanced plug with included 6.35 mm-to-3.5 mm adapter

Sources

Beyerdynamic DT 990 PRO 250 ohm

Manufacturer specification

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

Sennheiser HD 650

Manufacturer specification · Needs a matching headphone output.

Sennheiser HD 650 — manufacturer specifications Sennheiser HD 650 — exact UK article and product details

Check the exact configuration and source conditions for your use.

Rated total harmonic distortion

Beyerdynamic DT 990 PRO 250 ohm<0.2%

Sennheiser HD 650≤0.05% at 1 kHz, 1 V rms

Sources

Beyerdynamic DT 990 PRO 250 ohm

Manufacturer specification

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

Sennheiser HD 650

Manufacturer specification

Sennheiser HD 650 — manufacturer specifications Sennheiser HD 650 — exact UK article and product details

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

Earpads

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

Sennheiser HD 650Velour ear pads; replaceable

Sources

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)

Sennheiser HD 650

Manufacturer specification · Replacement procedure shown in the manual.

Sennheiser HD 650 — manufacturer specifications Sennheiser HD 650 — exact UK article and product details

Check the exact configuration and source conditions for your use.

Show 4 more verified differences

Frequency characteristic

Beyerdynamic DT 990 PRO 250 ohmDiffuse-field

Sennheiser HD 650Diffuse-field equalised

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)

Sennheiser HD 650

Manufacturer specification

Sennheiser HD 650 — manufacturer specifications

Check the exact configuration and source conditions for your use.

Rated frequency range

Beyerdynamic DT 990 PRO 250 ohm5–35,000 Hz

Sennheiser HD 65010–41,000 Hz (−10 dB)

Sources

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)

Sennheiser HD 650

Manufacturer specification · The manual rates 10–41,000 Hz at −10 dB; Sennheiser's UK feature list quotes 12–41,000 Hz without a threshold.

Sennheiser HD 650 — manufacturer specifications Sennheiser HD 650 — exact UK article and product details

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

Rated sensitivity

Beyerdynamic DT 990 PRO 250 ohm96 dB nominal SPL

Sennheiser HD 650103 dB SPL at 1 kHz, 1 V rms

Sources

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)

Sennheiser HD 650

Manufacturer specification · Rated at 1 kHz with 1 V rms; not directly comparable with dB/mW ratings.

Sennheiser HD 650 — manufacturer specifications

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 990 PRO 250 ohmEvery part serviceable; ear pads (EDT 990 V) and headband pad (BN 59-53/D) listed as replacement parts

Sennheiser HD 650Detachable cable and replaceable ear pads; headband padding via repair service

Sources

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)

Sennheiser HD 650

Manufacturer specification · Replacement procedures are in the manual; spare-part availability varies.

Sennheiser HD 650 — manufacturer specifications

Check the exact configuration and source conditions for your use.

Same feature, different names (1)

The sources publish different names for the same feature. Both names and their sources are shown; they are not counted as differences.

Wearing style

Beyerdynamic DT 990 PRO 250 ohmOver-ear (circumaural), open-back wired studio headphones

Sennheiser HD 650Over-ear (circumaural), open-back dynamic headphones

Sources

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)

Sennheiser HD 650

Manufacturer specification

Sennheiser HD 650 — manufacturer specifications

Both sources state the same feature under different published names. This is not a verified difference; check the exact feature you need.

Small physical differences (1)

Weight without cable

Beyerdynamic DT 990 PRO 250 ohm250 g

Sennheiser HD 650260 g

Sources

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)

Sennheiser HD 650

Manufacturer specification · Approximate, without the cable.

Sennheiser HD 650 — manufacturer specifications

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

Missing or non-comparable evidence (14)

Active noise cancellation

Beyerdynamic DT 990 PRO 250 ohmNo

Sennheiser HD 650Not verified

Sources

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)

Sennheiser HD 650

The reviewed exact manufacturer sources establish open-back dynamic construction but do not explicitly state whether active noise cancellation is present or absent. Acoustic mesh, an absorber or an omitted ANC control does not establish ANC=false. · Manufacturer specification

Sennheiser HD 650 — manufacturer specifications Sennheiser HD 650 — exact UK article and product details

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

Microphone

In Visual facts

Beyerdynamic DT 990 PRO 250 ohmNo

Sennheiser HD 650Not verified

Sources

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)

Sennheiser HD 650

The reviewed exact manufacturer sources do not explicitly establish microphone presence or absence for the supplied configuration. Stereo audio conductors and omitted controls are not proof that no microphone exists. · Manufacturer specification

Sennheiser HD 650 — manufacturer specifications Sennheiser HD 650 — exact UK article and product details

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

Battery life

Beyerdynamic DT 990 PRO 250 ohmNot required: passive wired headphones powered by the audio source

Sennheiser HD 650Not verified

Sources

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)

Sennheiser HD 650

The reviewed exact manufacturer sources do not explicitly give battery life or state that no battery is required for operation. A wired analogue connection is known; the generic disposal wording “battery/rechargeable battery (if applicable)” establishes neither presence nor absence. · Manufacturer specification

Sennheiser HD 650 — manufacturer specifications Sennheiser HD 650 — exact UK article and product details

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

Included and optional cables

Beyerdynamic DT 990 PRO 250 ohmNot verified

Sennheiser HD 650Detachable 3 m unbalanced cable included; 4.4 mm and XLR-4 cables optional

Sources

Beyerdynamic DT 990 PRO 250 ohm

No source recorded for this side.

Sennheiser HD 650

Manufacturer specification · Optional cables are sold separately; balanced cables need a balanced headphone output.

Sennheiser HD 650 — manufacturer specifications Sennheiser HD 650 — exact UK article and product details

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

Rated contact pressure

Beyerdynamic DT 990 PRO 250 ohmNot verified

Sennheiser HD 650Approximately 6.0 N ±1.0 N

Sources

Beyerdynamic DT 990 PRO 250 ohm

No source recorded for this side.

Sennheiser HD 650

Manufacturer specification · Nominal clamping force; individual fit and comfort can differ.

Sennheiser HD 650 — manufacturer specifications

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

Driver diameter

Beyerdynamic DT 990 PRO 250 ohmNot verified

Sennheiser HD 65042 mm

Sources

Beyerdynamic DT 990 PRO 250 ohm

No source recorded for this side.

Sennheiser HD 650

Manufacturer specification · Complete transducer diameter; the diaphragm is 38 mm.

Sennheiser HD 650 — exact UK article and product details

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

Nominal headband pressure

Beyerdynamic DT 990 PRO 250 ohmApprox. 3.5–5.5 N

Sennheiser HD 650Not verified

Sources

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)

Sennheiser HD 650

No source recorded for this side.

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

HEADPHONE LAB software

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

Sennheiser HD 650Not verified

Sources

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

Sennheiser HD 650

No source recorded for this side.

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

Supplied 3.5 mm adapter

Beyerdynamic DT 990 PRO 250 ohmNot verified

Sennheiser HD 650Yes

Sources

Beyerdynamic DT 990 PRO 250 ohm

No source recorded for this side.

Sennheiser HD 650

Manufacturer specification · Manual package contents explicitly includes a 6.35 mm-to-3.5 mm stereo adapter.

Sennheiser HD 650 — manufacturer specifications Sennheiser HD 650 — exact UK article and product details

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

Rated long-term input power

Beyerdynamic DT 990 PRO 250 ohmNot verified

Sennheiser HD 650Maximum 500 mW under EN 60-268-7

Sources

Beyerdynamic DT 990 PRO 250 ohm

No source recorded for this side.

Sennheiser HD 650

Manufacturer specification · Maximum input the headphones can handle, not the amplifier power they need.

Sennheiser HD 650 — manufacturer specifications

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

Static magnetic field at the surface

Beyerdynamic DT 990 PRO 250 ohmNot verified

Sennheiser HD 6501.8 mT

Sources

Beyerdynamic DT 990 PRO 250 ohm

No source recorded for this side.

Sennheiser HD 650

Manufacturer specification · Static magnetic field at the headphone surface.

Sennheiser HD 650 — manufacturer specifications Sennheiser HD 650 — exact UK article and product details

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

Operating temperature

Beyerdynamic DT 990 PRO 250 ohmNot verified

Sennheiser HD 650−10 °C to +55 °C

Sources

Beyerdynamic DT 990 PRO 250 ohm

No source recorded for this side.

Sennheiser HD 650

Manufacturer specification

Sennheiser HD 650 — manufacturer specifications

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

Power handling

Beyerdynamic DT 990 PRO 250 ohm100 mW

Sennheiser HD 650Not verified

Sources

Beyerdynamic DT 990 PRO 250 ohm

Manufacturer specification

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

Sennheiser HD 650

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 990 PRO 250 ohm375 g

Sennheiser HD 650Not verified

Sources

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.

Sennheiser HD 650

No source recorded for this side.

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

2 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 990 PRO 250 ohm

Select a feature to check your fit.

YOUR CHOICE

Sennheiser HD 650

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 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

Sennheiser HD 650

What it brings

Its 42 mm dynamic driver has hand-paired transducers matched within ±1 dB, and the supplied 6.35 mm cable with 3.5 mm adapter fits both common socket sizes. The cable and velour ear pads are replaceable.
Manufacturer source Manufacturer source

What to check

At 300 ohms, check that your amplifier or audio source can drive the headphones properly. The documented connection uses the supplied analogue audio cable and 3.5 mm adapter.
Manufacturer source Manufacturer source
Sennheiser describes the intended use as listening at home with high-quality audio systems. The 4.4 mm balanced and XLR-4 cables are optional accessories.
Manufacturer source Manufacturer source

COMPARE THE DETAILS

Full specifications

How we verify

Differences only

28 of 28 specifications Sources in each row

Source-backed specifications for Beyerdynamic DT 990 PRO 250 ohm and Sennheiser HD 650
Specification	Beyerdynamic DT 990 PRO 250 ohm	Sennheiser HD 650

Wearing style Sources 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) Sennheiser HD 650 Manufacturer specification Sennheiser HD 650 — manufacturer specifications	Over-ear (circumaural), open-back wired studio headphones	Over-ear (circumaural), open-back dynamic headphones
Weight without cableDifferent Sources 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) Sennheiser HD 650 Manufacturer specification · Approximate, without the cable. Sennheiser HD 650 — manufacturer specifications	250 g	260 g
Weight including cable Sources 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) Sennheiser HD 650 No source recorded.	375 g	Not provided
Acoustic design Sources 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) Sennheiser HD 650 Manufacturer specification Sennheiser HD 650 — manufacturer specifications	Open-back	Open-back
Nominal headband pressure Sources 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) Sennheiser HD 650 No source recorded.	Approx. 3.5–5.5 N	Not provided
EarpadsDifferent Sources 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) Sennheiser HD 650 Manufacturer specification · Replacement procedure shown in the manual. Sennheiser HD 650 — manufacturer specifications Sennheiser HD 650 — exact UK article and product details	Velour, circumaural, replaceable (spare part EDT 990 V)	Velour ear pads; replaceable
ServiceabilityDifferent Sources 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) Sennheiser HD 650 Manufacturer specification · Replacement procedures are in the manual; spare-part availability varies. Sennheiser HD 650 — manufacturer specifications	Every part serviceable; ear pads (EDT 990 V) and headband pad (BN 59-53/D) listed as replacement parts	Detachable cable and replaceable ear pads; headband padding via repair service
Rated contact pressure Sources Beyerdynamic DT 990 PRO 250 ohm No source recorded. Sennheiser HD 650 Manufacturer specification · Nominal clamping force; individual fit and comfort can differ. Sennheiser HD 650 — manufacturer specifications	Not provided	Approximately 6.0 N ±1.0 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) Sennheiser HD 650 Manufacturer specification · Optional 4.4 mm and XLR-4 balanced cables are sold separately. Sennheiser HD 650 — manufacturer specifications Sennheiser HD 650 — exact UK article and product details	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	Wired analogue; detachable 6.35 mm unbalanced cable and included 3.5 mm adapter
Battery life Sources 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) Sennheiser HD 650 The reviewed exact manufacturer sources do not explicitly give battery life or state that no battery is required for operation. A wired analogue connection is known; the generic disposal wording “battery/rechargeable battery (if applicable)” establishes neither presence nor absence. · Manufacturer specification Sennheiser HD 650 — manufacturer specifications Sennheiser HD 650 — exact UK article and product details	Not required: passive wired headphones powered by the audio source	Not listed by the manufacturer
Cable length Sources 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) Sennheiser HD 650 Manufacturer specification · Length of the supplied cable. Sennheiser HD 650 — manufacturer specifications Sennheiser HD 650 — exact UK article and product details	3 m	3 m
Supplied plug and adapterDifferent Sources Beyerdynamic DT 990 PRO 250 ohm Manufacturer specification beyerdynamic DT 990 PRO — spec sheet E1/DT 990 PRO (08.22) Sennheiser HD 650 Manufacturer specification · Needs a matching headphone output. Sennheiser HD 650 — manufacturer specifications Sennheiser HD 650 — exact UK article and product details	Gold-plated 3.5 mm stereo mini-jack with 6.35 mm (1/4-inch) adapter	6.35 mm unbalanced plug with included 6.35 mm-to-3.5 mm adapter
Included and optional cables Sources Beyerdynamic DT 990 PRO 250 ohm No source recorded. Sennheiser HD 650 Manufacturer specification · Optional cables are sold separately; balanced cables need a balanced headphone output. Sennheiser HD 650 — manufacturer specifications Sennheiser HD 650 — exact UK article and product details	Not provided	Detachable 3 m unbalanced cable included; 4.4 mm and XLR-4 cables optional

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) Sennheiser HD 650 Manufacturer specification · The driver, diaphragm and voice-coil sizes describe different parts. Sennheiser HD 650 — manufacturer specifications Sennheiser HD 650 — exact UK article and product details	Dynamic	42 mm dynamic transducer with 38 mm diaphragm and aluminium voice coil; acoustic mesh and hand-paired transducers within stated ±1 dB tolerance
Nominal impedanceDifferent Sources 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) Sennheiser HD 650 Manufacturer specification · Nominal impedance; check that your amplifier or audio source can drive this load. Sennheiser HD 650 — exact UK article and product details	250 ohm	300 ohm
Rated frequency rangeDifferent Sources 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) Sennheiser HD 650 Manufacturer specification · The manual rates 10–41,000 Hz at −10 dB; Sennheiser's UK feature list quotes 12–41,000 Hz without a threshold. Sennheiser HD 650 — manufacturer specifications Sennheiser HD 650 — exact UK article and product details	5–35,000 Hz	10–41,000 Hz (−10 dB)
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) Sennheiser HD 650 Manufacturer specification Sennheiser HD 650 — manufacturer specifications	Diffuse-field	Diffuse-field equalised
Rated sensitivityDifferent Sources 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) Sennheiser HD 650 Manufacturer specification · Rated at 1 kHz with 1 V rms; not directly comparable with dB/mW ratings. Sennheiser HD 650 — manufacturer specifications	96 dB nominal SPL	103 dB SPL at 1 kHz, 1 V rms
Rated total harmonic distortionDifferent Sources Beyerdynamic DT 990 PRO 250 ohm Manufacturer specification beyerdynamic DT 990 PRO — spec sheet E1/DT 990 PRO (08.22) Sennheiser HD 650 Manufacturer specification Sennheiser HD 650 — manufacturer specifications Sennheiser HD 650 — exact UK article and product details	<0.2%	≤0.05% at 1 kHz, 1 V rms
Power handling Sources Beyerdynamic DT 990 PRO 250 ohm Manufacturer specification beyerdynamic DT 990 PRO — spec sheet E1/DT 990 PRO (08.22) Sennheiser HD 650 No source recorded.	100 mW	Not provided
Rated long-term input power Sources Beyerdynamic DT 990 PRO 250 ohm No source recorded. Sennheiser HD 650 Manufacturer specification · Maximum input the headphones can handle, not the amplifier power they need. Sennheiser HD 650 — manufacturer specifications	Not provided	Maximum 500 mW under EN 60-268-7
Driver diameter Sources Beyerdynamic DT 990 PRO 250 ohm No source recorded. Sennheiser HD 650 Manufacturer specification · Complete transducer diameter; the diaphragm is 38 mm. Sennheiser HD 650 — exact UK article and product details	Not provided	42 mm

Microphone Sources 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) Sennheiser HD 650 The reviewed exact manufacturer sources do not explicitly establish microphone presence or absence for the supplied configuration. Stereo audio conductors and omitted controls are not proof that no microphone exists. · Manufacturer specification Sennheiser HD 650 — manufacturer specifications Sennheiser HD 650 — exact UK article and product details	No	Not listed by the manufacturer
Active noise cancellation Sources 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) Sennheiser HD 650 The reviewed exact manufacturer sources establish open-back dynamic construction but do not explicitly state whether active noise cancellation is present or absent. Acoustic mesh, an absorber or an omitted ANC control does not establish ANC=false. · Manufacturer specification Sennheiser HD 650 — manufacturer specifications Sennheiser HD 650 — exact UK article and product details	No	Not listed by the manufacturer

HEADPHONE LAB software Sources 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 Sennheiser HD 650 No source recorded.	Supported through a separate DAW plug-in	Not provided

Supplied 3.5 mm adapter Sources Beyerdynamic DT 990 PRO 250 ohm No source recorded. Sennheiser HD 650 Manufacturer specification · Manual package contents explicitly includes a 6.35 mm-to-3.5 mm stereo adapter. Sennheiser HD 650 — manufacturer specifications Sennheiser HD 650 — exact UK article and product details	Not provided	Yes

Static magnetic field at the surface Sources Beyerdynamic DT 990 PRO 250 ohm No source recorded. Sennheiser HD 650 Manufacturer specification · Static magnetic field at the headphone surface. Sennheiser HD 650 — manufacturer specifications Sennheiser HD 650 — exact UK article and product details	Not provided	1.8 mT
Operating temperature Sources Beyerdynamic DT 990 PRO 250 ohm No source recorded. Sennheiser HD 650 Manufacturer specification Sennheiser HD 650 — manufacturer specifications	Not provided	−10 °C to +55 °C

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.