HEADPHONES · YOUR NEXT FACE-OFF

Samsung Galaxy Buds4 Pro vs Sennheiser HD 650

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

Compared products

YOUR FIRST CHOICE

Samsung Galaxy Buds4 Pro

SM-R640NZKAEUB · Black · UK

Full product profile Official image

Exact model & source notes

Galaxy Buds4 Pro (SM-R640NZKAEUB in black for the UK, SM-R640NZKAXAR in the US) are Samsung's in-ear true wireless earbuds with silicone ear tips, a 2-way woofer-and-tweeter speaker, adaptive active noise cancellation and Bluetooth 6.1 with LE Audio. Samsung rates them at up to 6 hours of music with ANC on and 26 hours with the case.

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 Samsung Galaxy Buds4 Pro for

A wireless connection

Choose the Sennheiser HD 650 for

A wired connection

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

See the 3 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

Samsung Galaxy Buds4 Pro 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 SIDE6 topics

Yes and No describe the listed feature. Missing evidence stays unverified.

SELECTED TOPIC

01 / 06

Open-back design

Open-back earcups are not sealed. Start here if your listening space is quiet; this construction is not a sound-quality rating.

Samsung Galaxy Buds4 ProNot verified

Sennheiser HD 650Yes

Open-back. Manufacturer specification

Source 1

Choose your must-haves

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 ↓

3 verified differences, most decision-relevant first. Missing information stays separate.

Wired / wireless connections

Samsung Galaxy Buds4 ProBluetooth 6.1 (A2DP, AVRCP, HFP, PBP, TMAP; LE Audio); Charging Case can be charged wirelessly

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

Sources

Samsung Galaxy Buds4 Pro

Manufacturer specification · No USB Type-C cable is included, and the wireless charger and cable are sold separately; Samsung does not name the case's wired charging port on this page. Charging power 2.5 to 4.5 W. On Galaxy devices with One UI 8.0 or later, settings are in the phone's device settings and Quick Panel; earlier versions use the Galaxy Wearable app, which needs Android 12.0 or above with at least 1.5 GB of memory. On iOS the earbuds connect as Bluetooth audio but cannot be controlled because the Galaxy Wearable app is not supported. Samsung (US) lists HD Voice, 24-bit/96 kHz audio, 360 Audio, Bixby and Gemini voice wake-up, Interpreter/Live Translate, Head Gestures and Gaming Mode as unavailable on non-Samsung Android phones with the app; iOS devices and PCs connected over Bluetooth get 16-bit/44 kHz audio, standard call quality, ANC and Ambient mode.

Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications Samsung US — Galaxy Buds4 page with Galaxy Buds comparison table

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.

Drivers

Samsung Galaxy Buds4 ProEnhanced 2-way speaker (woofer + tweeter) with dual amplifier

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

Samsung Galaxy Buds4 Pro

Manufacturer specification

Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications Samsung US — Galaxy Buds4 page with Galaxy Buds comparison table

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.

Wearing style

Samsung Galaxy Buds4 ProIn-ear, true wireless (silicone ear tips, S/M/L supplied)

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

Sources

Samsung Galaxy Buds4 Pro

Manufacturer specification · Two separate earbuds with a charging case. Samsung lists earbuds, three sizes of ear tips (M fitted by default), the charging case and a Quick Start Guide in the box; no USB-C cable is included.

Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications

Sennheiser HD 650

Manufacturer specification

Sennheiser HD 650 — manufacturer specifications

Check the exact configuration and source conditions for your use.

Missing or non-comparable evidence (36)

Acoustic design

Samsung Galaxy Buds4 ProNot verified

Sennheiser HD 650Open-back

Sources

Samsung Galaxy Buds4 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.

Active noise cancellation

Samsung Galaxy Buds4 ProYes

Sennheiser HD 650Not verified

Sources

Samsung Galaxy Buds4 Pro

Manufacturer specification · Active Noise Cancellation with Adaptive ANC, Adaptive Noise Control, Ambient Sound, Voice Detect and Siren Detect. Adaptive Noise Control, Voice Detect and Siren Detect are off by default.

Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications

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

Samsung Galaxy Buds4 ProYes

Sennheiser HD 650Not verified

Sources

Samsung Galaxy Buds4 Pro

Manufacturer specification · Each earbud contains three microphones (six in total), plus a VPU (voice pickup unit) sensor. Super Clear Call isolates the voice with DNN processing and sends it over Super Wideband up to 16 kHz; SWB is available on listed Galaxy devices with One UI 6.1.1 or above and may not be supported depending on the mobile network.

Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications

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

Samsung Galaxy Buds4 ProMusic playback: earbuds up to 6 hours with ANC on (up to 7 hours with ANC off); with the charging case up to 26 hours with ANC on (up to 30 hours with ANC off). Talk time: up to 4.5 hours (ANC on) / 5 hours (ANC off) per charge, 20 / 22 hours with the case.

Sennheiser HD 650Not verified

Sources

Samsung Galaxy Buds4 Pro

Manufacturer specification · Samsung's rated figures; actual battery life may vary with usage conditions, settings, number of charges, Bluetooth signal strength and other factors. Earbud battery 61 mAh, case 530 mAh (typical). The Samsung US comparison table gives the same 6.0/26 h (ANC on) and 7.0/30 h (ANC off) play times.

Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications Samsung US — Galaxy Buds4 page with Galaxy Buds comparison table

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.

Nominal impedance

Samsung Galaxy Buds4 ProNot verified

Sennheiser HD 650300 ohm

Sources

Samsung Galaxy Buds4 Pro

No source recorded for this side.

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

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

Auracast

Samsung Galaxy Buds4 ProYes

Sennheiser HD 650Not verified

Sources

Samsung Galaxy Buds4 Pro

Manufacturer specification

Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications

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.

Auto Switch

Samsung Galaxy Buds4 ProYes

Sennheiser HD 650Not verified

Sources

Samsung Galaxy Buds4 Pro

Manufacturer specification · Moves audio between Samsung Galaxy devices: Galaxy Book with One UI 6.0 Book or later, Galaxy smartphones and Galaxy Tab with One UI 4.1.1 or later, and Galaxy Watch4 series or later, logged in to a Samsung Account. With Samsung TVs (launched Feb 2022 or later, after a July 2022 firmware update) it only covers phone calls.

Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications

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.

Battery capacity

Samsung Galaxy Buds4 ProEarbuds 61 mAh (typical); Charging Case 530 mAh (typical)

Sennheiser HD 650Not verified

Sources

Samsung Galaxy Buds4 Pro

Manufacturer specification

Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications

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.

Included and optional cables

Samsung Galaxy Buds4 ProNot verified

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

Sources

Samsung Galaxy Buds4 Pro

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.

Included cable length

Samsung Galaxy Buds4 ProNot verified

Sennheiser HD 6503 m

Sources

Samsung Galaxy Buds4 Pro

No source recorded for this side.

Sennheiser HD 650

Manufacturer specification · Length of the supplied cable.

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.

Bluetooth audio codecs

Samsung Galaxy Buds4 ProAAC, SBC, SSC (Samsung Seamless Codec), SSC-UHQ (24-bit / 96 kHz), LC3

Sennheiser HD 650Not verified

Sources

Samsung Galaxy Buds4 Pro

Manufacturer specification · SSC-UHQ (24-bit / 96 kHz) is off by default and available on listed Galaxy S, Z and Tab devices with One UI 6.1.1 or above. LC3 is used over LE Audio, which the paired device must support.

Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications Samsung US — Galaxy Buds4 page with Galaxy Buds comparison table

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

Samsung Galaxy Buds4 ProNot verified

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

Sources

Samsung Galaxy Buds4 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

Samsung Galaxy Buds4 ProNot verified

Sennheiser HD 650Approximately 6.0 N ±1.0 N

Sources

Samsung Galaxy Buds4 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.

Earbud controls

Samsung Galaxy Buds4 ProPinch Control: single pinch play/pause, answer or end a call; double pinch next track; triple pinch previous track; pinch and hold for the preset feature or to decline a call; swipe up or down for volume

Sennheiser HD 650Not verified

Sources

Samsung Galaxy Buds4 Pro

Manufacturer specification · Samsung also lists Voice Command and Bixby Voice Wake-up (off by default).

Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications

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.

Rated total harmonic distortion

Samsung Galaxy Buds4 ProNot verified

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

Sources

Samsung Galaxy Buds4 Pro

No source recorded for this side.

Sennheiser HD 650

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.

Driver diameter

Samsung Galaxy Buds4 ProNot verified

Sennheiser HD 65042 mm

Sources

Samsung Galaxy Buds4 Pro

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.

Ear pads

Samsung Galaxy Buds4 ProNot verified

Sennheiser HD 650Velour ear pads; replaceable

Sources

Samsung Galaxy Buds4 Pro

No source recorded for this side.

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

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

Equaliser

Samsung Galaxy Buds4 Pro9-band equaliser; Adaptive EQ adapts sound to ear shape and wearing style; Volume EQ

Sennheiser HD 650Not verified

Sources

Samsung Galaxy Buds4 Pro

Manufacturer specification

Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications

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.

Frequency equalisation

Samsung Galaxy Buds4 ProNot verified

Sennheiser HD 650Diffuse-field equalised

Sources

Samsung Galaxy Buds4 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.

Rated frequency range

Samsung Galaxy Buds4 ProNot verified

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

Sources

Samsung Galaxy Buds4 Pro

No source recorded for this side.

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

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

Galaxy AI features

Samsung Galaxy Buds4 ProInterpreter and Live Translate with compatible Samsung Galaxy devices

Sennheiser HD 650Not verified

Sources

Samsung Galaxy Buds4 Pro

Manufacturer specification · Interpreter needs a smartphone with Galaxy AI features on One UI 6.1.1 or later; availability varies by device model, and a Samsung Account login may be required.

Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications

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.

Head gestures

Samsung Galaxy Buds4 ProHead nod/shake for incoming calls and Bixby

Sennheiser HD 650Not verified

Sources

Samsung Galaxy Buds4 Pro

Manufacturer specification · Off by default; set in the phone settings of paired devices running One UI 8.5 and later.

Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications

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

Samsung Galaxy Buds4 ProNot verified

Sennheiser HD 650Yes

Sources

Samsung Galaxy Buds4 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.

Rated long-term input power

Samsung Galaxy Buds4 ProNot verified

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

Sources

Samsung Galaxy Buds4 Pro

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

Samsung Galaxy Buds4 ProNot verified

Sennheiser HD 6501.8 mT

Sources

Samsung Galaxy Buds4 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.

Neck Stretch Reminder

Samsung Galaxy Buds4 ProYes

Sennheiser HD 650Not verified

Sources

Samsung Galaxy Buds4 Pro

Manufacturer specification

Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications

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

Samsung Galaxy Buds4 ProNot verified

Sennheiser HD 650−10 °C to +55 °C

Sources

Samsung Galaxy Buds4 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.

Samsung Find

Samsung Galaxy Buds4 ProYes

Sennheiser HD 650Not verified

Sources

Samsung Galaxy Buds4 Pro

Manufacturer specification

Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications

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.

Rated sensitivity

Samsung Galaxy Buds4 ProNot verified

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

Sources

Samsung Galaxy Buds4 Pro

No source recorded for this side.

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

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

Sensors

Samsung Galaxy Buds4 ProAccelerometer, gyro sensor, Hall sensor, pressure sensor, proximity sensor, touch sensor, VPU (voice pickup unit)

Sennheiser HD 650Not verified

Sources

Samsung Galaxy Buds4 Pro

Manufacturer specification

Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications

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.

Replaceable parts

Samsung Galaxy Buds4 ProNot verified

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

Sources

Samsung Galaxy Buds4 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.

Spatial audio

Samsung Galaxy Buds4 Pro360 Audio with head tracking

Sennheiser HD 650Not verified

Sources

Samsung Galaxy Buds4 Pro

Manufacturer specification · Only available on Samsung Galaxy smartphones and Galaxy Tab devices with One UI 3.1 or later and selected Samsung TV models; support for 360 Audio and head tracking may vary by application and content.

Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications

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.

Dust, sweat and water resistance

Samsung Galaxy Buds4 ProIP57 (earbuds only; the Charging Case is not water resistant)

Sennheiser HD 650Not verified

Sources

Samsung Galaxy Buds4 Pro

Manufacturer specification · IP57 is based on laboratory test conditions for submersion in up to 1 metre of fresh water for up to 30 minutes. Not advised for beach or pool use. If the earbuds are damaged they are not guaranteed to be water resistant; wet earbuds must be dried before being placed in the Charging Case.

Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications

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 per earbud

Samsung Galaxy Buds4 Pro5.1 g

Sennheiser HD 650Not verified

Sources

Samsung Galaxy Buds4 Pro

Manufacturer specification · Each earbud (30.9 x 18.1 x 19.6 mm). The charging case weighs 44.3 g (51 x 28.3 x 51 mm).

Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications

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.

Dimensions

Samsung Galaxy Buds4 ProEach earbud (H x W x D): 30.9 x 18.1 x 19.6 mm; Charging Case: 51 x 28.3 x 51 mm

Sennheiser HD 650Not verified

Sources

Samsung Galaxy Buds4 Pro

Manufacturer specification

Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications

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

Samsung Galaxy Buds4 ProNot verified

Sennheiser HD 650260 g

Sources

Samsung Galaxy Buds4 Pro

No source recorded for this side.

Sennheiser HD 650

Manufacturer specification · Approximate, without the cable.

Sennheiser HD 650 — manufacturer specifications

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

0 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

Samsung Galaxy Buds4 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

Samsung Galaxy Buds4 Pro

What it brings

Samsung lists a 2-way woofer-and-tweeter speaker with dual amplifiers plus Voice Detect and Siren Detect; the Galaxy Buds4 has a 1-way driver with a single amplifier and Samsung says those two detection features are Buds4 Pro features.
Manufacturer source Manufacturer source Manufacturer source
IP57 rating on the earbuds (Samsung says the Charging Case is not water resistant), three sizes of ear tips in the box and a wirelessly charged case.
Manufacturer source

What to check

The Galaxy Wearable app is not supported on iOS, so iPhone owners get Bluetooth audio without Samsung's controls; elsewhere the app needs Android 12.0 or later, while Galaxy devices on One UI 8.0 or later use the phone's own settings.
Manufacturer source
Neither a USB-C cable nor a wireless charger is included, and each earbud weighs 5.1 g, heavier than the 4.6 g Galaxy Buds4.
Manufacturer source 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

39 of 39 specifications Sources in each row

Source-backed specifications for Samsung Galaxy Buds4 Pro and Sennheiser HD 650
Specification	Samsung Galaxy Buds4 Pro	Sennheiser HD 650

Wearing styleDifferent Sources Samsung Galaxy Buds4 Pro Manufacturer specification · Two separate earbuds with a charging case. Samsung lists earbuds, three sizes of ear tips (M fitted by default), the charging case and a Quick Start Guide in the box; no USB-C cable is included. Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications Sennheiser HD 650 Manufacturer specification Sennheiser HD 650 — manufacturer specifications	In-ear, true wireless (silicone ear tips, S/M/L supplied)	Over-ear (circumaural), open-back dynamic headphones
Weight per earbud Sources Samsung Galaxy Buds4 Pro Manufacturer specification · Each earbud (30.9 x 18.1 x 19.6 mm). The charging case weighs 44.3 g (51 x 28.3 x 51 mm). Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications Sennheiser HD 650 No source recorded.	5.1 g	Not provided
Dimensions Sources Samsung Galaxy Buds4 Pro Manufacturer specification Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications Sennheiser HD 650 No source recorded.	Each earbud (H x W x D): 30.9 x 18.1 x 19.6 mm; Charging Case: 51 x 28.3 x 51 mm	Not provided
Dust, sweat and water resistance Sources Samsung Galaxy Buds4 Pro Manufacturer specification · IP57 is based on laboratory test conditions for submersion in up to 1 metre of fresh water for up to 30 minutes. Not advised for beach or pool use. If the earbuds are damaged they are not guaranteed to be water resistant; wet earbuds must be dried before being placed in the Charging Case. Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications Sennheiser HD 650 No source recorded.	IP57 (earbuds only; the Charging Case is not water resistant)	Not provided
Weight Sources Samsung Galaxy Buds4 Pro No source recorded. Sennheiser HD 650 Manufacturer specification · Approximate, without the cable. Sennheiser HD 650 — manufacturer specifications	Not provided	260 g
Acoustic design Sources Samsung Galaxy Buds4 Pro No source recorded. Sennheiser HD 650 Manufacturer specification Sennheiser HD 650 — manufacturer specifications	Not provided	Open-back
Replaceable parts Sources Samsung Galaxy Buds4 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
Ear pads Sources Samsung Galaxy Buds4 Pro No source recorded. 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	Not provided	Velour ear pads; replaceable
Rated contact pressure Sources Samsung Galaxy Buds4 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 Samsung Galaxy Buds4 Pro Manufacturer specification · No USB Type-C cable is included, and the wireless charger and cable are sold separately; Samsung does not name the case's wired charging port on this page. Charging power 2.5 to 4.5 W. On Galaxy devices with One UI 8.0 or later, settings are in the phone's device settings and Quick Panel; earlier versions use the Galaxy Wearable app, which needs Android 12.0 or above with at least 1.5 GB of memory. On iOS the earbuds connect as Bluetooth audio but cannot be controlled because the Galaxy Wearable app is not supported. Samsung (US) lists HD Voice, 24-bit/96 kHz audio, 360 Audio, Bixby and Gemini voice wake-up, Interpreter/Live Translate, Head Gestures and Gaming Mode as unavailable on non-Samsung Android phones with the app; iOS devices and PCs connected over Bluetooth get 16-bit/44 kHz audio, standard call quality, ANC and Ambient mode. Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications Samsung US — Galaxy Buds4 page with Galaxy Buds comparison table 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	Bluetooth 6.1 (A2DP, AVRCP, HFP, PBP, TMAP; LE Audio); Charging Case can be charged wirelessly	Wired analogue; detachable 6.35 mm unbalanced cable and included 3.5 mm adapter
Battery life Sources Samsung Galaxy Buds4 Pro Manufacturer specification · Samsung's rated figures; actual battery life may vary with usage conditions, settings, number of charges, Bluetooth signal strength and other factors. Earbud battery 61 mAh, case 530 mAh (typical). The Samsung US comparison table gives the same 6.0/26 h (ANC on) and 7.0/30 h (ANC off) play times. Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications Samsung US — Galaxy Buds4 page with Galaxy Buds comparison table 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	Music playback: earbuds up to 6 hours with ANC on (up to 7 hours with ANC off); with the charging case up to 26 hours with ANC on (up to 30 hours with ANC off). Talk time: up to 4.5 hours (ANC on) / 5 hours (ANC off) per charge, 20 / 22 hours with the case.	Not listed by the manufacturer
Battery capacity Sources Samsung Galaxy Buds4 Pro Manufacturer specification Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications Sennheiser HD 650 No source recorded.	Earbuds 61 mAh (typical); Charging Case 530 mAh (typical)	Not provided
Bluetooth audio codecs Sources Samsung Galaxy Buds4 Pro Manufacturer specification · SSC-UHQ (24-bit / 96 kHz) is off by default and available on listed Galaxy S, Z and Tab devices with One UI 6.1.1 or above. LC3 is used over LE Audio, which the paired device must support. Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications Samsung US — Galaxy Buds4 page with Galaxy Buds comparison table Sennheiser HD 650 No source recorded.	AAC, SBC, SSC (Samsung Seamless Codec), SSC-UHQ (24-bit / 96 kHz), LC3	Not provided
Auto Switch Sources Samsung Galaxy Buds4 Pro Manufacturer specification · Moves audio between Samsung Galaxy devices: Galaxy Book with One UI 6.0 Book or later, Galaxy smartphones and Galaxy Tab with One UI 4.1.1 or later, and Galaxy Watch4 series or later, logged in to a Samsung Account. With Samsung TVs (launched Feb 2022 or later, after a July 2022 firmware update) it only covers phone calls. Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications Sennheiser HD 650 No source recorded.	Yes	Not provided
Auracast Sources Samsung Galaxy Buds4 Pro Manufacturer specification Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications Sennheiser HD 650 No source recorded.	Yes	Not provided
Included cable length Sources Samsung Galaxy Buds4 Pro No source recorded. Sennheiser HD 650 Manufacturer specification · Length of the supplied cable. Sennheiser HD 650 — manufacturer specifications Sennheiser HD 650 — exact UK article and product details	Not provided	3 m
Supplied plug configuration Sources Samsung Galaxy Buds4 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
Included and optional cables Sources Samsung Galaxy Buds4 Pro 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

DriversDifferent Sources Samsung Galaxy Buds4 Pro Manufacturer specification Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications Samsung US — Galaxy Buds4 page with Galaxy Buds comparison table 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	Enhanced 2-way speaker (woofer + tweeter) with dual amplifier	42 mm dynamic transducer with 38 mm diaphragm and aluminium voice coil; acoustic mesh and hand-paired transducers within stated ±1 dB tolerance
Spatial audio Sources Samsung Galaxy Buds4 Pro Manufacturer specification · Only available on Samsung Galaxy smartphones and Galaxy Tab devices with One UI 3.1 or later and selected Samsung TV models; support for 360 Audio and head tracking may vary by application and content. Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications Sennheiser HD 650 No source recorded.	360 Audio with head tracking	Not provided
Equaliser Sources Samsung Galaxy Buds4 Pro Manufacturer specification Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications Sennheiser HD 650 No source recorded.	9-band equaliser; Adaptive EQ adapts sound to ear shape and wearing style; Volume EQ	Not provided
Nominal impedance Sources Samsung Galaxy Buds4 Pro No source recorded. 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	Not provided	300 ohm
Rated frequency range Sources Samsung Galaxy Buds4 Pro No source recorded. 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	Not provided	10–41,000 Hz (−10 dB)
Rated sensitivity Sources Samsung Galaxy Buds4 Pro No source recorded. 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	Not provided	103 dB SPL at 1 kHz, 1 V rms
Rated long-term input power Sources Samsung Galaxy Buds4 Pro 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
Frequency equalisation Sources Samsung Galaxy Buds4 Pro No source recorded. Sennheiser HD 650 Manufacturer specification Sennheiser HD 650 — manufacturer specifications	Not provided	Diffuse-field equalised
Rated total harmonic distortion Sources Samsung Galaxy Buds4 Pro No source recorded. Sennheiser HD 650 Manufacturer specification Sennheiser HD 650 — manufacturer specifications Sennheiser HD 650 — exact UK article and product details	Not provided	≤0.05% at 1 kHz, 1 V rms
Driver diameter Sources Samsung Galaxy Buds4 Pro 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 Samsung Galaxy Buds4 Pro Manufacturer specification · Each earbud contains three microphones (six in total), plus a VPU (voice pickup unit) sensor. Super Clear Call isolates the voice with DNN processing and sends it over Super Wideband up to 16 kHz; SWB is available on listed Galaxy devices with One UI 6.1.1 or above and may not be supported depending on the mobile network. Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications 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	Yes	Not listed by the manufacturer
Active noise cancellation Sources Samsung Galaxy Buds4 Pro Manufacturer specification · Active Noise Cancellation with Adaptive ANC, Adaptive Noise Control, Ambient Sound, Voice Detect and Siren Detect. Adaptive Noise Control, Voice Detect and Siren Detect are off by default. Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications 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	Yes	Not listed by the manufacturer

Sensors Sources Samsung Galaxy Buds4 Pro Manufacturer specification Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications Sennheiser HD 650 No source recorded.	Accelerometer, gyro sensor, Hall sensor, pressure sensor, proximity sensor, touch sensor, VPU (voice pickup unit)	Not provided
Head gestures Sources Samsung Galaxy Buds4 Pro Manufacturer specification · Off by default; set in the phone settings of paired devices running One UI 8.5 and later. Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications Sennheiser HD 650 No source recorded.	Head nod/shake for incoming calls and Bixby	Not provided
Earbud controls Sources Samsung Galaxy Buds4 Pro Manufacturer specification · Samsung also lists Voice Command and Bixby Voice Wake-up (off by default). Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications Sennheiser HD 650 No source recorded.	Pinch Control: single pinch play/pause, answer or end a call; double pinch next track; triple pinch previous track; pinch and hold for the preset feature or to decline a call; swipe up or down for volume	Not provided
Galaxy AI features Sources Samsung Galaxy Buds4 Pro Manufacturer specification · Interpreter needs a smartphone with Galaxy AI features on One UI 6.1.1 or later; availability varies by device model, and a Samsung Account login may be required. Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications Sennheiser HD 650 No source recorded.	Interpreter and Live Translate with compatible Samsung Galaxy devices	Not provided
Samsung Find Sources Samsung Galaxy Buds4 Pro Manufacturer specification Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications Sennheiser HD 650 No source recorded.	Yes	Not provided
Neck Stretch Reminder Sources Samsung Galaxy Buds4 Pro Manufacturer specification Samsung UK — Galaxy Buds4 Pro, Black (SM-R640NZKAEUB): product page and specifications Sennheiser HD 650 No source recorded.	Yes	Not provided

Supplied 3.5 mm adapter Sources Samsung Galaxy Buds4 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 Samsung Galaxy Buds4 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 Samsung Galaxy Buds4 Pro No source recorded. Sennheiser HD 650 Manufacturer specification Sennheiser HD 650 — manufacturer specifications	Not provided	−10 °C to +55 °C

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Impedance: 300 Ω
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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.