HEADPHONES · YOUR NEXT FACE-OFF

Sennheiser HD 490 PRO vs Sennheiser HD 650

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

Compared products

YOUR FIRST CHOICE

Sennheiser HD 490 PRO

700286 · HD 490 PRO (standard, not PRO Plus) · wired

Full product profile Official image

Exact model & source notes

The HD 490 PRO (article 700286) is Sennheiser's open-back, around-ear wired studio reference headphone. It has a 38 mm dynamic transducer, a rated 130 Ω impedance, two interchangeable ear-pad sets for mixing and producing, a detachable cable that can plug into either ear cup, and braille-guided L/R ear cups with grooved pads for eyeglass wearers.

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 HD 490 PRO for

Lower stated nominal impedance: 130 ohm vs 300 ohm

Choose the HD 650 for

Higher stated nominal impedance: 300 ohm vs 130 ohm
Longer stated cable length: 3 m vs 1.8 m

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

See the 11 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

HD 490 PRO UK & US retailers

UK & US price history: no verified listing yet

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.

Sennheiser HD 490 PRO130 Ω

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 ↓

11 verified differences, most decision-relevant first. 2 are also drawn in Visual facts above. 1 feature is the same under different published names, grouped below. Missing information stays separate.

Wired / wireless connections

Sennheiser HD 490 PROWired; detachable 1.8 m cable with 3.5 mm plug and supplied 6.3 mm adapter; right and left ear-cup jacks

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

Sources

Sennheiser HD 490 PRO

Manufacturer specification · Replacement 1.8 m, 3 m, balanced and coiled cables are sold separately as accessories.

Sennheiser HD 490 PRO (article 700286) — official UK product page and technical data Sennheiser HD 490 PRO | HD 490 PRO Plus — product specification sheet (EN)

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

Sennheiser HD 490 PRO130 ohm

Sennheiser HD 650300 ohm

Sources

Sennheiser HD 490 PRO

Manufacturer specification

Sennheiser HD 490 PRO (article 700286) — official UK product page and technical data Sennheiser HD 490 PRO | HD 490 PRO Plus — product specification sheet (EN)

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

Sennheiser HD 490 PRO38 mm dynamic transducer

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

Sennheiser HD 490 PRO

Manufacturer specification

Sennheiser HD 490 PRO | HD 490 PRO Plus — product specification sheet (EN)

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.

Cable arrangement

Sennheiser HD 490 PRODetachable 1.8 m cable; right and left ear-cup jacks, so the cable can be connected on either side

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

Sources

Sennheiser HD 490 PRO

Manufacturer specification · Sennheiser: 'Right and left ear jacks with detachable cable easily adapts to any studio configuration'. Only one 1.8 m cable is in the standard 700286 box.

Sennheiser HD 490 PRO (article 700286) — official UK product page and technical data

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

Check the exact configuration and source conditions for your use.

Cable length

In Visual facts

Sennheiser HD 490 PRO1.8 m

Sennheiser HD 6503 m

Sources

Sennheiser HD 490 PRO

Manufacturer specification

Sennheiser HD 490 PRO (article 700286) — official UK product page and technical data

Sennheiser HD 650

Manufacturer specification · Length of the supplied cable.

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

Sennheiser HD 490 PRO<0.2% at 1 kHz, 100 dB SPL

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

Sources

Sennheiser HD 490 PRO

Manufacturer specification

Sennheiser HD 490 PRO | HD 490 PRO Plus — product specification sheet (EN)

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.

Show 5 more verified differences

Driver diameter

Sennheiser HD 490 PRO38 mm

Sennheiser HD 65042 mm

Sources

Sennheiser HD 490 PRO

Manufacturer specification

Sennheiser HD 490 PRO | HD 490 PRO Plus — product specification sheet (EN)

Sennheiser HD 650

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

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.

Ear pads

Sennheiser HD 490 PROTwo washable, replaceable sets supplied: mixing pads and producing pads

Sennheiser HD 650Velour ear pads; replaceable

Sources

Sennheiser HD 490 PRO

Manufacturer specification

Sennheiser HD 490 PRO | HD 490 PRO Plus — product specification sheet (EN)

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.

Rated frequency range

Sennheiser HD 490 PRO5–36,100 Hz (−10 dB)

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

Sources

Sennheiser HD 490 PRO

Manufacturer specification · The specification sheet states 36,100 Hz; the product page rounds the upper limit to 36,000 Hz.

Sennheiser HD 490 PRO (article 700286) — official UK product page and technical data Sennheiser HD 490 PRO | HD 490 PRO Plus — product specification sheet (EN)

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 power

Sennheiser HD 490 PRO300 mW (100 h, noise IEC 60268)

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

Sources

Sennheiser HD 490 PRO

Manufacturer specification · The datasheet labels this 'Power rating'; the product page lists the same figure as 'Power consumption (Amp)'.

Sennheiser HD 490 PRO (article 700286) — official UK product page and technical data Sennheiser HD 490 PRO | HD 490 PRO Plus — product specification sheet (EN)

Sennheiser HD 650

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

Sennheiser HD 650 — manufacturer specifications

A rated input limit is not electricity consumption or required amplifier power. Different test standards cannot establish a performance advantage.

Rated sensitivity

Sennheiser HD 490 PRO105 dB SPL (1 kHz, 1 Vrms); 96 dB SPL (1 kHz, 1 mW)

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

Sources

Sennheiser HD 490 PRO

Manufacturer specification · Two references are given: per volt and per milliwatt.

Sennheiser HD 490 PRO | HD 490 PRO Plus — product specification sheet (EN)

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.

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

Sennheiser HD 490 PROOver-ear (circumaural), open-back wired studio headphones

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

Sources

Sennheiser HD 490 PRO

Manufacturer specification

Sennheiser HD 490 PRO (article 700286) — official UK product page and technical data Sennheiser HD 490 PRO | HD 490 PRO Plus — product specification sheet (EN)

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.

Missing or non-comparable evidence (13)

Active noise cancellation

Sennheiser HD 490 PRONot verified

Sennheiser HD 650Not verified

Sources

Sennheiser HD 490 PRO

The reviewed exact sources do not explicitly establish active noise cancellation absence. Preserve separately sourced acoustic design and passive attenuation; they cannot turn omitted ANC into a false capability. · Manufacturer specification

Sennheiser HD 490 PRO | HD 490 PRO Plus — product specification sheet (EN)

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

Sennheiser HD 490 PRONot verified

Sennheiser HD 650Not verified

Sources

Sennheiser HD 490 PRO

The reviewed exact sources do not explicitly establish microphone absence. Omission from a package or technical inventory, a stereo audio connector, and a without-remote statement do not establish microphone=false. · Manufacturer specification

Sennheiser HD 490 PRO (article 700286) — official UK product page and technical data Sennheiser HD 490 PRO | HD 490 PRO Plus — product specification sheet (EN)

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

Sennheiser HD 490 PRONot verified

Sennheiser HD 650Not verified

Sources

Sennheiser HD 490 PRO

The reviewed exact sources do not explicitly establish battery life or that no battery is required for operation. A wired/dynamic audio path, omitted charger or Battery included N is not an explicit operating-power requirement. · Manufacturer specification

Sennheiser HD 490 PRO (article 700286) — official UK product page and technical data Sennheiser HD 490 PRO | HD 490 PRO Plus — product specification sheet (EN)

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.

Accessibility features

Sennheiser HD 490 PROBraille-guided L/R ear cups; grooved ear pads for eyeglasses

Sennheiser HD 650Not verified

Sources

Sennheiser HD 490 PRO

Manufacturer specification · Sennheiser describes these as patented accessibility features.

Sennheiser HD 490 PRO (article 700286) — official UK product page and technical data

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 plug configuration

Sennheiser HD 490 PRONot verified

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

Sources

Sennheiser HD 490 PRO

No source recorded for this side.

Sennheiser HD 650

Manufacturer specification · Needs a matching 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

Sennheiser HD 490 PRONot verified

Sennheiser HD 650Approximately 6.0 N ±1.0 N

Sources

Sennheiser HD 490 PRO

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.

Frequency equalisation

Sennheiser HD 490 PRONot verified

Sennheiser HD 650Diffuse-field equalised

Sources

Sennheiser HD 490 PRO

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.

In the box

Sennheiser HD 490 PROHD 490 PRO headphones, 3.5 mm to 6.3 mm adapter, 1.8 m cable, mixing ear pads, producing ear pads, quick guide, safety guide

Sennheiser HD 650Not verified

Sources

Sennheiser HD 490 PRO

Manufacturer specification · The HD 490 PRO Plus (700287) adds a 3 m cable, an extra headband pad and a case; it is a separate article.

Sennheiser HD 490 PRO (article 700286) — official UK product page and technical data Sennheiser HD 490 PRO | HD 490 PRO Plus — product specification sheet (EN)

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

Sennheiser HD 490 PRONot verified

Sennheiser HD 650Yes

Sources

Sennheiser HD 490 PRO

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.

Static magnetic field at the surface

Sennheiser HD 490 PRONot verified

Sennheiser HD 6501.8 mT

Sources

Sennheiser HD 490 PRO

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.

Maximum sound pressure level

Sennheiser HD 490 PRO128 dB SPL (1 kHz, 5% THD)

Sennheiser HD 650Not verified

Sources

Sennheiser HD 490 PRO

Manufacturer specification

Sennheiser HD 490 PRO | HD 490 PRO Plus — product specification sheet (EN)

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.

Operating temperature

Sennheiser HD 490 PRONot verified

Sennheiser HD 650−10 °C to +55 °C

Sources

Sennheiser HD 490 PRO

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.

Replaceable parts

Sennheiser HD 490 PRONot verified

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

Sources

Sennheiser HD 490 PRO

No source recorded for this side.

Sennheiser HD 650

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

Sennheiser HD 650 — manufacturer specifications

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

Sennheiser HD 490 PRO

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

Sennheiser HD 490 PRO

What it brings

Two washable, replaceable ear-pad sets come in the box, one for mixing and one for producing, so the listener can switch pad type without buying accessories.
Manufacturer source Manufacturer source
Sensitivity is stated both per volt (105 dB SPL) and per milliwatt (96 dB SPL) at 130 Ω, which helps when matching it to an interface or headphone amplifier.
Manufacturer source

What to check

It uses an open acoustic principle; Sennheiser presents the open-back design as providing natural ventilation and publishes no ambient-noise attenuation figure.
Manufacturer source Manufacturer source
The standard 700286 box has one 1.8 m cable and no case. The 3 m cable, extra headband pad and case come with the separate PRO Plus article.
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

27 of 27 specifications Sources in each row

Source-backed specifications for Sennheiser HD 490 PRO and Sennheiser HD 650
Specification	Sennheiser HD 490 PRO	Sennheiser HD 650

Wearing style Sources Sennheiser HD 490 PRO Manufacturer specification Sennheiser HD 490 PRO (article 700286) — official UK product page and technical data Sennheiser HD 490 PRO \| HD 490 PRO Plus — product specification sheet (EN) 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 Sources Sennheiser HD 490 PRO Manufacturer specification · Without cable, per the specification sheet. Sennheiser HD 490 PRO (article 700286) — official UK product page and technical data Sennheiser HD 490 PRO \| HD 490 PRO Plus — product specification sheet (EN) Sennheiser HD 650 Manufacturer specification · Approximate, without the cable. Sennheiser HD 650 — manufacturer specifications	260 g	260 g
Acoustic design Sources Sennheiser HD 490 PRO Manufacturer specification Sennheiser HD 490 PRO \| HD 490 PRO Plus — product specification sheet (EN) Sennheiser HD 650 Manufacturer specification Sennheiser HD 650 — manufacturer specifications	Open-back	Open-back
Ear padsDifferent Sources Sennheiser HD 490 PRO Manufacturer specification Sennheiser HD 490 PRO \| HD 490 PRO Plus — product specification sheet (EN) 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	Two washable, replaceable sets supplied: mixing pads and producing pads	Velour ear pads; replaceable
Replaceable parts Sources Sennheiser HD 490 PRO No source recorded. Sennheiser HD 650 Manufacturer specification · Replacement procedures are in the manual; spare-part availability varies. Sennheiser HD 650 — manufacturer specifications	Not provided	Detachable cable and replaceable ear pads; headband padding via repair service
Rated contact pressure Sources Sennheiser HD 490 PRO 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 Sennheiser HD 490 PRO Manufacturer specification · Replacement 1.8 m, 3 m, balanced and coiled cables are sold separately as accessories. Sennheiser HD 490 PRO (article 700286) — official UK product page and technical data Sennheiser HD 490 PRO \| HD 490 PRO Plus — product specification sheet (EN) 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; detachable 1.8 m cable with 3.5 mm plug and supplied 6.3 mm adapter; right and left ear-cup jacks	Wired analogue; detachable 6.35 mm unbalanced cable and included 3.5 mm adapter
Cable arrangementDifferent Sources Sennheiser HD 490 PRO Manufacturer specification · Sennheiser: 'Right and left ear jacks with detachable cable easily adapts to any studio configuration'. Only one 1.8 m cable is in the standard 700286 box. Sennheiser HD 490 PRO (article 700286) — official UK product page and technical data 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	Detachable 1.8 m cable; right and left ear-cup jacks, so the cable can be connected on either side	Detachable 3 m unbalanced cable included; 4.4 mm and XLR-4 cables optional
Cable lengthDifferent Sources Sennheiser HD 490 PRO Manufacturer specification Sennheiser HD 490 PRO (article 700286) — official UK product page and technical data Sennheiser HD 650 Manufacturer specification · Length of the supplied cable. Sennheiser HD 650 — manufacturer specifications Sennheiser HD 650 — exact UK article and product details	1.8 m	3 m
Supplied plug configuration Sources Sennheiser HD 490 PRO No source recorded. Sennheiser HD 650 Manufacturer specification · Needs a matching headphone output. Sennheiser HD 650 — manufacturer specifications Sennheiser HD 650 — exact UK article and product details	Not provided	6.35 mm unbalanced plug with included 6.35 mm-to-3.5 mm adapter

Driver constructionDifferent Sources Sennheiser HD 490 PRO Manufacturer specification Sennheiser HD 490 PRO \| HD 490 PRO Plus — product specification sheet (EN) 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	38 mm dynamic transducer	42 mm dynamic transducer with 38 mm diaphragm and aluminium voice coil; acoustic mesh and hand-paired transducers within stated ±1 dB tolerance
Driver diameterDifferent Sources Sennheiser HD 490 PRO Manufacturer specification Sennheiser HD 490 PRO \| HD 490 PRO Plus — product specification sheet (EN) Sennheiser HD 650 Manufacturer specification · Complete transducer diameter; the diaphragm is 38 mm. Sennheiser HD 650 — exact UK article and product details	38 mm	42 mm
Rated frequency rangeDifferent Sources Sennheiser HD 490 PRO Manufacturer specification · The specification sheet states 36,100 Hz; the product page rounds the upper limit to 36,000 Hz. Sennheiser HD 490 PRO (article 700286) — official UK product page and technical data Sennheiser HD 490 PRO \| HD 490 PRO Plus — product specification sheet (EN) 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	5–36,100 Hz (−10 dB)	10–41,000 Hz (−10 dB)
Nominal impedanceDifferent Sources Sennheiser HD 490 PRO Manufacturer specification Sennheiser HD 490 PRO (article 700286) — official UK product page and technical data Sennheiser HD 490 PRO \| HD 490 PRO Plus — product specification sheet (EN) 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	130 ohm	300 ohm
Rated sensitivityDifferent Sources Sennheiser HD 490 PRO Manufacturer specification · Two references are given: per volt and per milliwatt. Sennheiser HD 490 PRO \| HD 490 PRO Plus — product specification sheet (EN) 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	105 dB SPL (1 kHz, 1 Vrms); 96 dB SPL (1 kHz, 1 mW)	103 dB SPL at 1 kHz, 1 V rms
Rated total harmonic distortionDifferent Sources Sennheiser HD 490 PRO Manufacturer specification Sennheiser HD 490 PRO \| HD 490 PRO Plus — product specification sheet (EN) Sennheiser HD 650 Manufacturer specification Sennheiser HD 650 — manufacturer specifications Sennheiser HD 650 — exact UK article and product details	<0.2% at 1 kHz, 100 dB SPL	≤0.05% at 1 kHz, 1 V rms
Maximum sound pressure level Sources Sennheiser HD 490 PRO Manufacturer specification Sennheiser HD 490 PRO \| HD 490 PRO Plus — product specification sheet (EN) Sennheiser HD 650 No source recorded.	128 dB SPL (1 kHz, 5% THD)	Not provided
Rated powerDifferent Sources Sennheiser HD 490 PRO Manufacturer specification · The datasheet labels this 'Power rating'; the product page lists the same figure as 'Power consumption (Amp)'. Sennheiser HD 490 PRO (article 700286) — official UK product page and technical data Sennheiser HD 490 PRO \| HD 490 PRO Plus — product specification sheet (EN) Sennheiser HD 650 Manufacturer specification · Maximum input the headphones can handle, not the amplifier power they need. Sennheiser HD 650 — manufacturer specifications	300 mW (100 h, noise IEC 60268)	Maximum 500 mW under EN 60-268-7
Frequency equalisation Sources Sennheiser HD 490 PRO No source recorded. Sennheiser HD 650 Manufacturer specification Sennheiser HD 650 — manufacturer specifications	Not provided	Diffuse-field equalised

Accessibility features Sources Sennheiser HD 490 PRO Manufacturer specification · Sennheiser describes these as patented accessibility features. Sennheiser HD 490 PRO (article 700286) — official UK product page and technical data Sennheiser HD 650 No source recorded.	Braille-guided L/R ear cups; grooved ear pads for eyeglasses	Not provided

In the box Sources Sennheiser HD 490 PRO Manufacturer specification · The HD 490 PRO Plus (700287) adds a 3 m cable, an extra headband pad and a case; it is a separate article. Sennheiser HD 490 PRO (article 700286) — official UK product page and technical data Sennheiser HD 490 PRO \| HD 490 PRO Plus — product specification sheet (EN) Sennheiser HD 650 No source recorded.	HD 490 PRO headphones, 3.5 mm to 6.3 mm adapter, 1.8 m cable, mixing ear pads, producing ear pads, quick guide, safety guide	Not provided
Supplied 3.5 mm adapter Sources Sennheiser HD 490 PRO 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 Sennheiser HD 490 PRO 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 Sennheiser HD 490 PRO No source recorded. Sennheiser HD 650 Manufacturer specification Sennheiser HD 650 — manufacturer specifications	Not provided	−10 °C to +55 °C

Show unverified (3)Not verified, not provided or conflicting for both products. Kept for completeness; never counted as a difference.

Specifications without verified values for either product
Microphone Sources Sennheiser HD 490 PRO The reviewed exact sources do not explicitly establish microphone absence. Omission from a package or technical inventory, a stereo audio connector, and a without-remote statement do not establish microphone=false. · Manufacturer specification Sennheiser HD 490 PRO (article 700286) — official UK product page and technical data Sennheiser HD 490 PRO \| HD 490 PRO Plus — product specification sheet (EN) 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	Not listed by the manufacturer	Not listed by the manufacturer
Active noise cancellation Sources Sennheiser HD 490 PRO The reviewed exact sources do not explicitly establish active noise cancellation absence. Preserve separately sourced acoustic design and passive attenuation; they cannot turn omitted ANC into a false capability. · Manufacturer specification Sennheiser HD 490 PRO \| HD 490 PRO Plus — product specification sheet (EN) 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	Not listed by the manufacturer	Not listed by the manufacturer
Battery life Sources Sennheiser HD 490 PRO The reviewed exact sources do not explicitly establish battery life or that no battery is required for operation. A wired/dynamic audio path, omitted charger or Battery included N is not an explicit operating-power requirement. · Manufacturer specification Sennheiser HD 490 PRO (article 700286) — official UK product page and technical data Sennheiser HD 490 PRO \| HD 490 PRO Plus — product specification sheet (EN) 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 listed by the manufacturer	Not listed by the manufacturer

First product manufacturer source Second product manufacturer source

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Sennheiser HD 800 S

Impedance: 300 Ω
Cable length: 3 m
Wearing style: Over-ear (circumaural), open-back dynamic headphones

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Sennheiser HD 600

Impedance: 300 Ω
Cable length: 3 m
Wearing style: Over-ear (circumaural), open-back dynamic headphones

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Sennheiser HD 660S2

Impedance: 300 Ω
Cable length: 1.8 m
Wearing style: Over-ear (circumaural), open-back dynamic headphones

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Sennheiser HD 550

Impedance: 150 Ω
Cable length: 1.8 m
Wearing style: Over-ear, open-back dynamic headphones

Prices & product profile

Each record represents an explicitly checked model and configuration. Original import: 5 Sept 2026; this is not its verification date. This is not a list of current offers or a popularity ranking.