HEADPHONES · YOUR NEXT FACE-OFF

OnePlus Buds 4 vs Sennheiser HD 800 S

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

Compared products

YOUR FIRST CHOICE

OnePlus Buds 4

5481158909 · Storm Gray · UK

Full product profile Official image

Exact model & source notes

OnePlus Buds 4 are true wireless earbuds with real-time adaptive ANC, a dual-driver design (11 mm woofer plus 6 mm tweeter) and Bluetooth 5.4 with LHDC 5.0, AAC and SBC, plus Steady Connect for extended range on select OnePlus phones. This record is the Storm Gray colour (UK SKU 5481158909); OnePlus rates it at 6 hours with ANC on and 24 hours with the case using AAC.

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 OnePlus Buds 4 for

A wireless connection

Choose the Sennheiser HD 800 S for

A wired connection

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

See the 5 verified differences

THE CONTENDER

Sennheiser HD 800 S

Black · HD 800 S · 506911

Full product profile Official image

Exact model & source notes

The HD 800 S is an open-back, over-ear headphone built around a 56 mm ring-radiator driver with an acoustic absorber. It is rated 4–51,000 Hz (−10 dB) at 300 ohms and ships with detachable 3 m cables in both 6.35 mm unbalanced and 4.4 mm balanced form.

Specifications checked 11 Sept 2026.

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

Manufacturer specifications

OnePlus Buds 4 UK & US retailers

UK & US price history: no verified listing yet

Sennheiser HD 800 S 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.

OnePlus Buds 4Not verified

Sennheiser HD 800 SYes

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 ↓

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

Wired / wireless connections

OnePlus Buds 4Bluetooth 5.4 with Steady Connect; LHDC 5.0, AAC and SBC codecs; dual-device connection

Sennheiser HD 800 SWired analogue; detachable 6.35 mm unbalanced and 4.4 mm balanced cables

Sources

OnePlus Buds 4

Manufacturer specification · Google Fast Pair is listed without an exact supported-phone range on these Buds 4 pages. Steady Connect is restricted to select OnePlus phones with OxygenOS 15.0.0 or later. The declared Bluetooth range is 10 m; actual conditions and interference vary. Case charging is separate and does not establish cable audio.

OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (UK) — OnePlus Buds 4 overview

Sennheiser HD 800 S

Manufacturer specification · The XLR-4 cable is an optional accessory. The manual describes using a standard 3.5 mm adapter, but its inclusion or exclusion is not explicitly established by the reviewed package list.

Sennheiser HD 800 S — manufacturer specifications Sennheiser HD 800 S — current instruction manual

Check the exact configuration and source conditions for your use.

Drivers

OnePlus Buds 4Dual drivers: 11 mm woofer + 6 mm tweeter

Sennheiser HD 800 S56 mm dynamic ring radiator; 40 mm voice coil; angled drivers, acoustic absorber, vibration-damping chassis and headband insert

Sources

OnePlus Buds 4

Manufacturer specification · Woofer: 30-layer ceramic-metal diaphragm; tweeter: flat diaphragm.

OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (UK) — OnePlus Buds 4 overview

Sennheiser HD 800 S

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

Sennheiser HD 800 S — manufacturer specifications Sennheiser HD 800 S — current instruction manual

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

Wearing style

OnePlus Buds 4In-ear, true wireless (ear tips in S, M and L)

Sennheiser HD 800 SOver-ear (circumaural), open-back dynamic headphones

Sources

OnePlus Buds 4

Manufacturer specification · Two earbuds (one pair) with a charging case; the box lists ear tips in S, M and L pairs, with M pre-installed. OnePlus does not state the ear tip material.

OnePlus (UK) — OnePlus Buds 4 Specs

Sennheiser HD 800 S

Manufacturer specification

Sennheiser HD 800 S — manufacturer specifications

Check the exact configuration and source conditions for your use.

Frequency response

OnePlus Buds 415 Hz to 40 kHz

Sennheiser HD 800 S10–44,100 Hz (−3 dB); 4–51,000 Hz (−10 dB)

Sources

OnePlus Buds 4

Manufacturer specification

OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (US) — OnePlus Buds 4 Specs

Sennheiser HD 800 S

Manufacturer specification · The manual gives both thresholds; the UK page lists only the wider range.

Sennheiser HD 800 S — manufacturer specifications Sennheiser HD 800 S — current instruction manual

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

Manufacturer sensitivity and reference

OnePlus Buds 4118 ± 1.3 dB at 1 mW

Sennheiser HD 800 S102 dB SPL at 1 kHz, 1 V rms

Sources

OnePlus Buds 4

Manufacturer specification · Buds 4 names a 1 mW input but no frequency or test fixture. Buds Pro 3 names 1 kHz and the literal “Input: -10 dB IEC711” notation, without identifying that input in volts or milliwatts. These do not provide sensitivity on the same basis; do not convert or rank them.

OnePlus (UK) — OnePlus Buds 4 Specs

Sennheiser HD 800 S

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

Sennheiser HD 800 S — current instruction manual

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.

Missing or non-comparable evidence (43)

Acoustic design

OnePlus Buds 4Not verified

Sennheiser HD 800 SOpen-back

Sources

OnePlus Buds 4

No source recorded for this side.

Sennheiser HD 800 S

Manufacturer specification

Sennheiser HD 800 S — manufacturer specifications

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

Active noise cancellation

OnePlus Buds 4Yes

Sennheiser HD 800 SNot verified

Sources

OnePlus Buds 4

Manufacturer specification · Real-time adaptive ANC advertised up to 55 dB and up to 5,500 Hz; modes: ANC on, Adaptive, Transparency and ANC off. The overview advertises 800 adjustments per second and a 200% voice-cancellation improvement (3×) against OnePlus Buds 3, based on OnePlus Test Laboratory results. These claims do not compare against Buds Pro 3, and no matched attenuation test is supplied. TÜV High Performance Noise Cancellation is a manufacturer-listed claim, not independently re-certified here.

OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (UK) — OnePlus Buds 4 overview

Sennheiser HD 800 S

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 800 S — manufacturer specifications Sennheiser HD 800 S — current instruction manual Sennheiser HD 800 S — manufacturer specification table

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

Microphone

In Visual facts

OnePlus Buds 4Yes

Sennheiser HD 800 SNot verified

Sources

OnePlus Buds 4

Manufacturer specification · Three microphones per earbud with 3-mic AI call noise cancellation.

OnePlus (UK) — OnePlus Buds 4 Specs

Sennheiser HD 800 S

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 800 S — manufacturer specifications Sennheiser HD 800 S — current instruction manual Sennheiser HD 800 S — manufacturer specification table

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

Battery life

OnePlus Buds 4Earbuds: 6 hours with ANC on, 11 hours with ANC off (AAC). With the case: 24 hours with ANC on, 45 hours with ANC off (AAC). Using LHDC: 5.5 / 22 hours with ANC on and 9 / 37 hours with ANC off.

Sennheiser HD 800 SNot verified

Sources

OnePlus Buds 4

Manufacturer specification · OnePlus test figures at 50% volume with the stated codec. Fast charge: 10 minutes gives 3.5 hours (earbuds) or 11 hours (earbuds + case) with ANC off, AAC.

OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (US) — OnePlus Buds 4 Specs

Sennheiser HD 800 S

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 800 S — manufacturer specifications Sennheiser HD 800 S — current instruction manual Sennheiser HD 800 S — manufacturer specification table

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

Listed driver impedances

OnePlus Buds 418 Ω ± 15%; 10 Ω ± 15%

Sennheiser HD 800 S300 ohm

Sources

OnePlus Buds 4

Manufacturer specification · The table gives two values but does not explicitly assign them to a named driver or a headphone input/load condition. Do not invent a woofer/tweeter assignment or amplifier compatibility result.

OnePlus (UK) — OnePlus Buds 4 Specs

Sennheiser HD 800 S

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

Sennheiser HD 800 S — manufacturer specifications

The recorded units or formats differ. These values are not ranked.

AI Translation

OnePlus Buds 4Yes

Sennheiser HD 800 SNot verified

Sources

OnePlus Buds 4

Manufacturer specification · Three earbud taps activate AI Translation on the OnePlus phone; available on select OnePlus devices with OxygenOS 15.0.1 and above.

OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (UK) — OnePlus Buds 4 overview

Sennheiser HD 800 S

No source recorded for this side.

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

Companion app

OnePlus Buds 4Compatible with the HeyMelody app. Sound features: Sound Master EQ (Balanced, Serenade and Bass Mode presets, a customisable six-band EQ and BassWave); Golden Sound personal audio profile from an ear scan and listening test

Sennheiser HD 800 SNot verified

Sources

OnePlus Buds 4

Manufacturer specification · Golden Sound (and OnePlus 3D Audio) is set in 'Earbuds Function' on OnePlus phones with Android 12 and above; other users (iOS / Android 7.0 and above) need the HeyMelody app. The specification page also lists OTA updates.

OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (UK) — OnePlus Buds 4 overview

Sennheiser HD 800 S

No source recorded for this side.

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

Battery capacity

OnePlus Buds 4Earbuds 62 mAh; charging case 530 mAh

Sennheiser HD 800 SNot verified

Sources

OnePlus Buds 4

Manufacturer specification

OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (US) — OnePlus Buds 4 Specs

Sennheiser HD 800 S

No source recorded for this side.

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

Playback with case, AAC, ANC on

OnePlus Buds 424 h

Sennheiser HD 800 SNot verified

Sources

OnePlus Buds 4

Manufacturer specification · Music playback with the case, AAC, ANC on and 50% volume. OnePlus Test Laboratory claim; actual performance varies.

OnePlus (UK) — OnePlus Buds 4 Specs

Sennheiser HD 800 S

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

OnePlus Buds 4Not verified

Sennheiser HD 800 SDetachable 3 m unbalanced and balanced cables included; XLR-4 cable optional

Sources

OnePlus Buds 4

No source recorded for this side.

Sennheiser HD 800 S

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

Sennheiser HD 800 S — manufacturer specifications Sennheiser HD 800 S — current instruction manual

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

Included cable length

OnePlus Buds 4Not verified

Sennheiser HD 800 S3 m

Sources

OnePlus Buds 4

No source recorded for this side.

Sennheiser HD 800 S

Manufacturer specification · Length of the supplied cable.

Sennheiser HD 800 S — manufacturer specifications Sennheiser HD 800 S — current instruction manual

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

UK published case weight

OnePlus Buds 439.57 g

Sennheiser HD 800 SNot verified

Sources

OnePlus Buds 4

Manufacturer specification · UK: 39.57 ± 1 g; US: 39.97 ± 1 g. The selected SKU is UK; the source discrepancy is unexplained. Do not average the figures, assert physical equivalence across regions or interpret case weight as the earbuds-and-case total.

OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (US) — OnePlus Buds 4 Specs

Sennheiser HD 800 S

No source recorded for this side.

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

Charge time

OnePlus Buds 4Earbuds about 50 minutes; earbuds + case about 80 minutes

Sennheiser HD 800 SNot verified

Sources

OnePlus Buds 4

Manufacturer specification

OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (US) — OnePlus Buds 4 Specs

Sennheiser HD 800 S

No source recorded for this side.

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

Case charging connector

OnePlus Buds 4USB Type-C

Sennheiser HD 800 SNot verified

Sources

OnePlus Buds 4

Manufacturer specification · The source describes charging, not USB audio or data operation. Compatible charger power and a cable-audio mode are not established.

OnePlus (UK) — OnePlus Buds 4 Specs

Sennheiser HD 800 S

No source recorded for this side.

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

Bluetooth codecs

OnePlus Buds 4LHDC 5.0, AAC, SBC

Sennheiser HD 800 SNot verified

Sources

OnePlus Buds 4

Manufacturer specification · LHDC 5.0 Hi-Res Audio up to 1 Mbps, 24 bit, 192 kHz. Hi-Res Audio is supported on Android devices with LHDC 5.0 (OnePlus phones with Android 12 and above via 'Earbuds Function'; other Android 7.0 and above via the HeyMelody app) and is not supported on iOS devices.

OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (UK) — OnePlus Buds 4 overview

Sennheiser HD 800 S

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

OnePlus Buds 4Not verified

Sennheiser HD 800 S6.35 mm unbalanced cable and 4.4 mm balanced cable

Sources

OnePlus Buds 4

No source recorded for this side.

Sennheiser HD 800 S

Manufacturer specification · Needs a matching headphone output; the 4.4 mm balanced cable needs a balanced output.

Sennheiser HD 800 S — manufacturer specifications Sennheiser HD 800 S — current instruction manual

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

Rated contact pressure

OnePlus Buds 4Not verified

Sennheiser HD 800 SApproximately 3.4 N ±0.3 N

Sources

OnePlus Buds 4

No source recorded for this side.

Sennheiser HD 800 S

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

Sennheiser HD 800 S — current instruction manual

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

Earbud controls

OnePlus Buds 4Touch controls on the stem: slide up or down for volume; long touch and hold to switch between Noise Cancellation and Transparency modes; single tap to play or pause; double tap for the next song; triple tap for the previous song

Sennheiser HD 800 SNot verified

Sources

OnePlus Buds 4

Manufacturer specification · Single tap must be manually activated in the phone Settings (OnePlus phones) or the HeyMelody app (other Android and iOS). OnePlus also lists a tap for the phone's built-in voice assistant (activated manually in the same way), Double-Tap for Camera Control and three taps for AI Translation on select OnePlus devices.

OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (UK) — OnePlus Buds 4 overview

Sennheiser HD 800 S

No source recorded for this side.

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

DAC

OnePlus Buds 4Dual DACs: a dedicated DAC for each driver (11 mm woofer and 6 mm tweeter)

Sennheiser HD 800 SNot verified

Sources

OnePlus Buds 4

Manufacturer specification

OnePlus (UK) — OnePlus Buds 4 overview

Sennheiser HD 800 S

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

OnePlus Buds 4Not verified

Sennheiser HD 800 S≤0.02% at 1 kHz, 1 V rms

Sources

OnePlus Buds 4

No source recorded for this side.

Sennheiser HD 800 S

Manufacturer specification

Sennheiser HD 800 S — manufacturer specifications Sennheiser HD 800 S — current instruction manual

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

Driver diameter

OnePlus Buds 4Not verified

Sennheiser HD 800 S56 mm

Sources

OnePlus Buds 4

No source recorded for this side.

Sennheiser HD 800 S

Manufacturer specification · Ring-radiator transducer diameter.

Sennheiser HD 800 S — manufacturer specifications Sennheiser HD 800 S — current instruction manual

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

Ear pads

OnePlus Buds 4Not verified

Sennheiser HD 800 SMicrofibre ear pads; replaceable

Sources

OnePlus Buds 4

No source recorded for this side.

Sennheiser HD 800 S

Manufacturer specification · Replacement procedure shown in the manual.

Sennheiser HD 800 S — manufacturer specifications Sennheiser HD 800 S — current instruction manual

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

Find My Earbuds

OnePlus Buds 4Yes

Sennheiser HD 800 SNot verified

Sources

OnePlus Buds 4

Manufacturer specification · Listed by name only; OnePlus does not describe how it works on these pages.

OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (UK) — OnePlus Buds 4 overview

Sennheiser HD 800 S

No source recorded for this side.

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

Frequency equalisation

OnePlus Buds 4Not verified

Sennheiser HD 800 SDiffuse-field equalised

Sources

OnePlus Buds 4

No source recorded for this side.

Sennheiser HD 800 S

Manufacturer specification

Sennheiser HD 800 S — current instruction manual

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

Spatial audio head tracking

OnePlus Buds 4Not verified

Sennheiser HD 800 SNot verified

Sources

OnePlus Buds 4

No explicit head-tracking presence or absence is established in the complete reviewed Buds4 pages. OnePlus3DAudio alone does not prove head tracking. · Manufacturer specification

OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (UK) — OnePlus Buds 4 overview

Sennheiser HD 800 S

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

OnePlus Buds 4Not verified

Sennheiser HD 800 SNot verified

Sources

OnePlus Buds 4

No source recorded for this side.

Sennheiser HD 800 S

The manual describes using a standard 3.5 mm adapter but does not explicitly say it is supplied or not supplied. It is absent from the reviewed package list; that omission is not a definitive exclusion. · Manufacturer specification

Sennheiser HD 800 S — manufacturer specifications Sennheiser HD 800 S — current instruction manual

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

Rated long-term input power

OnePlus Buds 4Not verified

Sennheiser HD 800 SMaximum 500 mW under EN 60-268-7

Sources

OnePlus Buds 4

No source recorded for this side.

Sennheiser HD 800 S

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

Sennheiser HD 800 S — current instruction manual

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

Low-latency mode

OnePlus Buds 447 ms low latency

Sennheiser HD 800 SNot verified

Sources

OnePlus Buds 4

Manufacturer specification · OnePlus Test Laboratory figure; enabled automatically on OnePlus phones, manual operation in the HeyMelody app on other brands.

OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (UK) — OnePlus Buds 4 overview

Sennheiser HD 800 S

No source recorded for this side.

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

Static magnetic field at the surface

OnePlus Buds 4Not verified

Sennheiser HD 800 S10.5 mT

Sources

OnePlus Buds 4

No source recorded for this side.

Sennheiser HD 800 S

Manufacturer specification · Static magnetic field at the headphone surface.

Sennheiser HD 800 S — manufacturer specifications Sennheiser HD 800 S — current instruction manual

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

Manufacturer microphone sensitivity

OnePlus Buds 4-38 ± 1 dB

Sennheiser HD 800 SNot verified

Sources

OnePlus Buds 4

Manufacturer specification · Buds4 gives no dBV/Pa reference; Pro3 explicitly gives dBV/Pa. These different bases cannot establish a microphone-performance difference.

OnePlus (UK) — OnePlus Buds 4 Specs

Sennheiser HD 800 S

No source recorded for this side.

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

Multipoint (dual-device) connection

OnePlus Buds 4Yes

Sennheiser HD 800 SNot verified

Sources

OnePlus Buds 4

Manufacturer specification

OnePlus (UK) — OnePlus Buds 4 Specs

Sennheiser HD 800 S

No source recorded for this side.

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

Operating temperature

OnePlus Buds 4Not verified

Sennheiser HD 800 S−10 °C to +55 °C

Sources

OnePlus Buds 4

No source recorded for this side.

Sennheiser HD 800 S

Manufacturer specification · Storage −20 °C to +70 °C; relative humidity 10–80% operating and 10–90% storage, non-condensing.

Sennheiser HD 800 S — current instruction manual

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

Manufacturer rated power

OnePlus Buds 410 mW

Sennheiser HD 800 SNot verified

Sources

OnePlus Buds 4

Manufacturer specification · The Audio table does not explicitly assign this rating to an individual driver or define a continuous/peak basis. No power-handling or sound-quality ranking is established.

OnePlus (UK) — OnePlus Buds 4 Specs

Sennheiser HD 800 S

No source recorded for this side.

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

Replaceable parts

OnePlus Buds 4Not verified

Sennheiser HD 800 SDetachable cables; replaceable ear pads, headband padding and washable 3D-mesh dust covers

Sources

OnePlus Buds 4

No source recorded for this side.

Sennheiser HD 800 S

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

Sennheiser HD 800 S — current instruction manual

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

UK published earbuds and case total weight

OnePlus Buds 449.02 g

Sennheiser HD 800 SNot verified

Sources

OnePlus Buds 4

Manufacturer specification · UK: 49.02 ± 1 g; US: 49.42 ± 1 g. These are published total values, not newly calculated sums. The regional difference remains unexplained.

OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (US) — OnePlus Buds 4 Specs

Sennheiser HD 800 S

No source recorded for this side.

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

Unreferenced advertised sound pressure

OnePlus Buds 496.5 dB

Sennheiser HD 800 SNot verified

Sources

OnePlus Buds 4

Manufacturer specification · No frequency, input reference, weighting or explicit maximum label is supplied in this row. Do not reinterpret as maximum SPL or sensitivity.

OnePlus (UK) — OnePlus Buds 4 Specs

Sennheiser HD 800 S

No source recorded for this side.

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

Spatial audio

OnePlus Buds 4Spatial audio rendering

Sennheiser HD 800 SNot verified

Sources

OnePlus Buds 4

Manufacturer specification · Marketed as OnePlus 3D Audio. Set through Earbuds Function on OnePlus phones running Android 12 or later, or through HeyMelody for other iOS/Android 7 or later users. These pages do not explicitly establish head tracking.

OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (UK) — OnePlus Buds 4 overview

Sennheiser HD 800 S

No source recorded for this side.

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

Bone-conduction voice pickup sensor

OnePlus Buds 4Not verified

Sennheiser HD 800 SNot verified

Sources

OnePlus Buds 4

The complete reviewed Buds4 pages describe three microphones per side but do not establish VPU presence or absence. · Manufacturer specification

OnePlus (UK) — OnePlus Buds 4 Specs

Sennheiser HD 800 S

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

OnePlus Buds 4IP55 (earbuds only; the charging case is not rated)

Sennheiser HD 800 SNot verified

Sources

OnePlus Buds 4

Manufacturer specification · OnePlus: the earbuds feature IP55 water and dust resistance, however the charging case does not. Water and dust resistance may diminish with device ageing; liquid and dust damage are not covered under the warranty.

OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (UK) — OnePlus Buds 4 overview

Sennheiser HD 800 S

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

OnePlus Buds 44.73 g

Sennheiser HD 800 SNot verified

Sources

OnePlus Buds 4

Manufacturer specification · Each earbud, stated as 4.73 ± 0.2 g on both UK and US pages. The UK page gives the charging case as 39.57 ± 1 g (total 49.02 ± 1 g); the US page gives 39.97 ± 1 g (total 49.42 ± 1 g).

OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (US) — OnePlus Buds 4 Specs

Sennheiser HD 800 S

No source recorded for this side.

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

Wireless case charging

OnePlus Buds 4Not verified

Sennheiser HD 800 SNot verified

Sources

OnePlus Buds 4

The complete reviewed exact pages list USB-C charging but do not explicitly establish wireless-charging presence or absence. Omission does not mean false. · Manufacturer specification

OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (UK) — OnePlus Buds 4 overview

Sennheiser HD 800 S

No source recorded for this side.

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

Dimensions

OnePlus Buds 4Each earbud: 31 x 20.6 x 24.2 mm; charging case: 65.4 x 52.4 x 25.3 mm

Sennheiser HD 800 SNot verified

Sources

OnePlus Buds 4

Manufacturer specification

OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (US) — OnePlus Buds 4 Specs

Sennheiser HD 800 S

No source recorded for this side.

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

Weight

OnePlus Buds 4Not verified

Sennheiser HD 800 S330 g

Sources

OnePlus Buds 4

No source recorded for this side.

Sennheiser HD 800 S

Manufacturer specification · Approximate, without the cable.

Sennheiser HD 800 S — current instruction manual

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

OnePlus Buds 4

Select a feature to check your fit.

YOUR CHOICE

Sennheiser HD 800 S

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

OnePlus Buds 4

What it brings

Supports the LHDC 5.0 codec alongside AAC and SBC, plus dual-device connection and Google Fast Pair.
Manufacturer source
Adaptive ANC is rated up to 55 dB, with separate Adaptive and Transparency modes, and each earbud has three microphones for calls.
Manufacturer source

What to check

The specification page lists USB-C case charging; wireless-charging support is not established by the reviewed exact sources.
Manufacturer source
Battery drops when using LHDC: 5.5 hours per charge with ANC on, versus 6 hours with AAC. OnePlus's UK and US pages also give slightly different case weights (39.57 g and 39.97 g).
Manufacturer source Manufacturer source

Sennheiser HD 800 S

What it brings

Its 56 mm ring-radiator driver is rated 10–44,100 Hz (−3 dB) with total harmonic distortion of 0.02% or less at 1 kHz and 1 V rms, in a diffuse-field-equalised open design.
Manufacturer source Manufacturer source
Both a 6.35 mm unbalanced and a 4.4 mm balanced cable are included, and the ear pads, headband padding and dust covers can be replaced by the owner.
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 cables with 6.35 mm and 4.4 mm plugs.
Manufacturer source Manufacturer source
Sennheiser describes the intended use as listening at home with high-quality audio systems. A standard 3.5 mm adapter can be used, but the reviewed sources do not explicitly establish whether one is included.
Manufacturer source Manufacturer source

COMPARE THE DETAILS

Full specifications

How we verify

Differences only

48 of 48 specifications Sources in each row

Source-backed specifications for OnePlus Buds 4 and Sennheiser HD 800 S
Specification	OnePlus Buds 4	Sennheiser HD 800 S

Wearing styleDifferent Sources OnePlus Buds 4 Manufacturer specification · Two earbuds (one pair) with a charging case; the box lists ear tips in S, M and L pairs, with M pre-installed. OnePlus does not state the ear tip material. OnePlus (UK) — OnePlus Buds 4 Specs Sennheiser HD 800 S Manufacturer specification Sennheiser HD 800 S — manufacturer specifications	In-ear, true wireless (ear tips in S, M and L)	Over-ear (circumaural), open-back dynamic headphones
Weight per earbud Sources OnePlus Buds 4 Manufacturer specification · Each earbud, stated as 4.73 ± 0.2 g on both UK and US pages. The UK page gives the charging case as 39.57 ± 1 g (total 49.02 ± 1 g); the US page gives 39.97 ± 1 g (total 49.42 ± 1 g). OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (US) — OnePlus Buds 4 Specs Sennheiser HD 800 S No source recorded.	4.73 g	Not provided
Dimensions Sources OnePlus Buds 4 Manufacturer specification OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (US) — OnePlus Buds 4 Specs Sennheiser HD 800 S No source recorded.	Each earbud: 31 x 20.6 x 24.2 mm; charging case: 65.4 x 52.4 x 25.3 mm	Not provided
Dust, sweat and water resistance Sources OnePlus Buds 4 Manufacturer specification · OnePlus: the earbuds feature IP55 water and dust resistance, however the charging case does not. Water and dust resistance may diminish with device ageing; liquid and dust damage are not covered under the warranty. OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (UK) — OnePlus Buds 4 overview Sennheiser HD 800 S No source recorded.	IP55 (earbuds only; the charging case is not rated)	Not provided
UK published case weight Sources OnePlus Buds 4 Manufacturer specification · UK: 39.57 ± 1 g; US: 39.97 ± 1 g. The selected SKU is UK; the source discrepancy is unexplained. Do not average the figures, assert physical equivalence across regions or interpret case weight as the earbuds-and-case total. OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (US) — OnePlus Buds 4 Specs Sennheiser HD 800 S No source recorded.	39.57 g	Not provided
UK published earbuds and case total weight Sources OnePlus Buds 4 Manufacturer specification · UK: 49.02 ± 1 g; US: 49.42 ± 1 g. These are published total values, not newly calculated sums. The regional difference remains unexplained. OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (US) — OnePlus Buds 4 Specs Sennheiser HD 800 S No source recorded.	49.02 g	Not provided
Acoustic design Sources OnePlus Buds 4 No source recorded. Sennheiser HD 800 S Manufacturer specification Sennheiser HD 800 S — manufacturer specifications	Not provided	Open-back
Weight Sources OnePlus Buds 4 No source recorded. Sennheiser HD 800 S Manufacturer specification · Approximate, without the cable. Sennheiser HD 800 S — current instruction manual	Not provided	330 g
Ear pads Sources OnePlus Buds 4 No source recorded. Sennheiser HD 800 S Manufacturer specification · Replacement procedure shown in the manual. Sennheiser HD 800 S — manufacturer specifications Sennheiser HD 800 S — current instruction manual	Not provided	Microfibre ear pads; replaceable
Replaceable parts Sources OnePlus Buds 4 No source recorded. Sennheiser HD 800 S Manufacturer specification · Replacement procedures are in the manual; spare-part availability varies. Sennheiser HD 800 S — current instruction manual	Not provided	Detachable cables; replaceable ear pads, headband padding and washable 3D-mesh dust covers
Rated contact pressure Sources OnePlus Buds 4 No source recorded. Sennheiser HD 800 S Manufacturer specification · Nominal clamping force; individual fit and comfort can differ. Sennheiser HD 800 S — current instruction manual	Not provided	Approximately 3.4 N ±0.3 N

Wired / wireless connectionsDifferent Sources OnePlus Buds 4 Manufacturer specification · Google Fast Pair is listed without an exact supported-phone range on these Buds 4 pages. Steady Connect is restricted to select OnePlus phones with OxygenOS 15.0.0 or later. The declared Bluetooth range is 10 m; actual conditions and interference vary. Case charging is separate and does not establish cable audio. OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (UK) — OnePlus Buds 4 overview Sennheiser HD 800 S Manufacturer specification · The XLR-4 cable is an optional accessory. The manual describes using a standard 3.5 mm adapter, but its inclusion or exclusion is not explicitly established by the reviewed package list. Sennheiser HD 800 S — manufacturer specifications Sennheiser HD 800 S — current instruction manual	Bluetooth 5.4 with Steady Connect; LHDC 5.0, AAC and SBC codecs; dual-device connection	Wired analogue; detachable 6.35 mm unbalanced and 4.4 mm balanced cables
Battery life Sources OnePlus Buds 4 Manufacturer specification · OnePlus test figures at 50% volume with the stated codec. Fast charge: 10 minutes gives 3.5 hours (earbuds) or 11 hours (earbuds + case) with ANC off, AAC. OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (US) — OnePlus Buds 4 Specs Sennheiser HD 800 S 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 800 S — manufacturer specifications Sennheiser HD 800 S — current instruction manual Sennheiser HD 800 S — manufacturer specification table	Earbuds: 6 hours with ANC on, 11 hours with ANC off (AAC). With the case: 24 hours with ANC on, 45 hours with ANC off (AAC). Using LHDC: 5.5 / 22 hours with ANC on and 9 / 37 hours with ANC off.	Not listed by the manufacturer
Battery capacity Sources OnePlus Buds 4 Manufacturer specification OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (US) — OnePlus Buds 4 Specs Sennheiser HD 800 S No source recorded.	Earbuds 62 mAh; charging case 530 mAh	Not provided
Charge time Sources OnePlus Buds 4 Manufacturer specification OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (US) — OnePlus Buds 4 Specs Sennheiser HD 800 S No source recorded.	Earbuds about 50 minutes; earbuds + case about 80 minutes	Not provided
Low-latency mode Sources OnePlus Buds 4 Manufacturer specification · OnePlus Test Laboratory figure; enabled automatically on OnePlus phones, manual operation in the HeyMelody app on other brands. OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (UK) — OnePlus Buds 4 overview Sennheiser HD 800 S No source recorded.	47 ms low latency	Not provided
Bluetooth codecs Sources OnePlus Buds 4 Manufacturer specification · LHDC 5.0 Hi-Res Audio up to 1 Mbps, 24 bit, 192 kHz. Hi-Res Audio is supported on Android devices with LHDC 5.0 (OnePlus phones with Android 12 and above via 'Earbuds Function'; other Android 7.0 and above via the HeyMelody app) and is not supported on iOS devices. OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (UK) — OnePlus Buds 4 overview Sennheiser HD 800 S No source recorded.	LHDC 5.0, AAC, SBC	Not provided
Multipoint (dual-device) connection Sources OnePlus Buds 4 Manufacturer specification OnePlus (UK) — OnePlus Buds 4 Specs Sennheiser HD 800 S No source recorded.	Yes	Not provided
Case charging connector Sources OnePlus Buds 4 Manufacturer specification · The source describes charging, not USB audio or data operation. Compatible charger power and a cable-audio mode are not established. OnePlus (UK) — OnePlus Buds 4 Specs Sennheiser HD 800 S No source recorded.	USB Type-C	Not provided
Playback with case, AAC, ANC on Sources OnePlus Buds 4 Manufacturer specification · Music playback with the case, AAC, ANC on and 50% volume. OnePlus Test Laboratory claim; actual performance varies. OnePlus (UK) — OnePlus Buds 4 Specs Sennheiser HD 800 S No source recorded.	24 h	Not provided
Included cable length Sources OnePlus Buds 4 No source recorded. Sennheiser HD 800 S Manufacturer specification · Length of the supplied cable. Sennheiser HD 800 S — manufacturer specifications Sennheiser HD 800 S — current instruction manual	Not provided	3 m
Included and optional cables Sources OnePlus Buds 4 No source recorded. Sennheiser HD 800 S Manufacturer specification · Optional cables are sold separately; balanced cables need a balanced headphone output. Sennheiser HD 800 S — manufacturer specifications Sennheiser HD 800 S — current instruction manual	Not provided	Detachable 3 m unbalanced and balanced cables included; XLR-4 cable optional
Supplied plug configuration Sources OnePlus Buds 4 No source recorded. Sennheiser HD 800 S Manufacturer specification · Needs a matching headphone output; the 4.4 mm balanced cable needs a balanced output. Sennheiser HD 800 S — manufacturer specifications Sennheiser HD 800 S — current instruction manual	Not provided	6.35 mm unbalanced cable and 4.4 mm balanced cable

DriversDifferent Sources OnePlus Buds 4 Manufacturer specification · Woofer: 30-layer ceramic-metal diaphragm; tweeter: flat diaphragm. OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (UK) — OnePlus Buds 4 overview Sennheiser HD 800 S Manufacturer specification · The driver, diaphragm and voice-coil sizes describe different parts. Sennheiser HD 800 S — manufacturer specifications Sennheiser HD 800 S — current instruction manual	Dual drivers: 11 mm woofer + 6 mm tweeter	56 mm dynamic ring radiator; 40 mm voice coil; angled drivers, acoustic absorber, vibration-damping chassis and headband insert
Frequency responseDifferent Sources OnePlus Buds 4 Manufacturer specification OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (US) — OnePlus Buds 4 Specs Sennheiser HD 800 S Manufacturer specification · The manual gives both thresholds; the UK page lists only the wider range. Sennheiser HD 800 S — manufacturer specifications Sennheiser HD 800 S — current instruction manual	15 Hz to 40 kHz	10–44,100 Hz (−3 dB); 4–51,000 Hz (−10 dB)
DAC Sources OnePlus Buds 4 Manufacturer specification OnePlus (UK) — OnePlus Buds 4 overview Sennheiser HD 800 S No source recorded.	Dual DACs: a dedicated DAC for each driver (11 mm woofer and 6 mm tweeter)	Not provided
Spatial audio Sources OnePlus Buds 4 Manufacturer specification · Marketed as OnePlus 3D Audio. Set through Earbuds Function on OnePlus phones running Android 12 or later, or through HeyMelody for other iOS/Android 7 or later users. These pages do not explicitly establish head tracking. OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (UK) — OnePlus Buds 4 overview Sennheiser HD 800 S No source recorded.	Spatial audio rendering	Not provided
Listed driver impedances Sources OnePlus Buds 4 Manufacturer specification · The table gives two values but does not explicitly assign them to a named driver or a headphone input/load condition. Do not invent a woofer/tweeter assignment or amplifier compatibility result. OnePlus (UK) — OnePlus Buds 4 Specs Sennheiser HD 800 S Manufacturer specification · Nominal impedance; check that your amplifier or audio source can drive this load. Sennheiser HD 800 S — manufacturer specifications	18 Ω ± 15%; 10 Ω ± 15%	300 ohm
Manufacturer sensitivity and referenceDifferent Sources OnePlus Buds 4 Manufacturer specification · Buds 4 names a 1 mW input but no frequency or test fixture. Buds Pro 3 names 1 kHz and the literal “Input: -10 dB IEC711” notation, without identifying that input in volts or milliwatts. These do not provide sensitivity on the same basis; do not convert or rank them. OnePlus (UK) — OnePlus Buds 4 Specs Sennheiser HD 800 S Manufacturer specification · Rated at 1 kHz with 1 V rms; not directly comparable with dB/mW ratings. Sennheiser HD 800 S — current instruction manual	118 ± 1.3 dB at 1 mW	102 dB SPL at 1 kHz, 1 V rms
Unreferenced advertised sound pressure Sources OnePlus Buds 4 Manufacturer specification · No frequency, input reference, weighting or explicit maximum label is supplied in this row. Do not reinterpret as maximum SPL or sensitivity. OnePlus (UK) — OnePlus Buds 4 Specs Sennheiser HD 800 S No source recorded.	96.5 dB	Not provided
Manufacturer rated power Sources OnePlus Buds 4 Manufacturer specification · The Audio table does not explicitly assign this rating to an individual driver or define a continuous/peak basis. No power-handling or sound-quality ranking is established. OnePlus (UK) — OnePlus Buds 4 Specs Sennheiser HD 800 S No source recorded.	10 mW	Not provided
Driver diameter Sources OnePlus Buds 4 No source recorded. Sennheiser HD 800 S Manufacturer specification · Ring-radiator transducer diameter. Sennheiser HD 800 S — manufacturer specifications Sennheiser HD 800 S — current instruction manual	Not provided	56 mm
Frequency equalisation Sources OnePlus Buds 4 No source recorded. Sennheiser HD 800 S Manufacturer specification Sennheiser HD 800 S — current instruction manual	Not provided	Diffuse-field equalised
Rated total harmonic distortion Sources OnePlus Buds 4 No source recorded. Sennheiser HD 800 S Manufacturer specification Sennheiser HD 800 S — manufacturer specifications Sennheiser HD 800 S — current instruction manual	Not provided	≤0.02% at 1 kHz, 1 V rms
Rated long-term input power Sources OnePlus Buds 4 No source recorded. Sennheiser HD 800 S Manufacturer specification · Maximum input the headphones can handle, not the amplifier power they need. Sennheiser HD 800 S — current instruction manual	Not provided	Maximum 500 mW under EN 60-268-7

Microphone Sources OnePlus Buds 4 Manufacturer specification · Three microphones per earbud with 3-mic AI call noise cancellation. OnePlus (UK) — OnePlus Buds 4 Specs Sennheiser HD 800 S 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 800 S — manufacturer specifications Sennheiser HD 800 S — current instruction manual Sennheiser HD 800 S — manufacturer specification table	Yes	Not listed by the manufacturer
Active noise cancellation Sources OnePlus Buds 4 Manufacturer specification · Real-time adaptive ANC advertised up to 55 dB and up to 5,500 Hz; modes: ANC on, Adaptive, Transparency and ANC off. The overview advertises 800 adjustments per second and a 200% voice-cancellation improvement (3×) against OnePlus Buds 3, based on OnePlus Test Laboratory results. These claims do not compare against Buds Pro 3, and no matched attenuation test is supplied. TÜV High Performance Noise Cancellation is a manufacturer-listed claim, not independently re-certified here. OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (UK) — OnePlus Buds 4 overview Sennheiser HD 800 S 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 800 S — manufacturer specifications Sennheiser HD 800 S — current instruction manual Sennheiser HD 800 S — manufacturer specification table	Yes	Not listed by the manufacturer
Manufacturer microphone sensitivity Sources OnePlus Buds 4 Manufacturer specification · Buds4 gives no dBV/Pa reference; Pro3 explicitly gives dBV/Pa. These different bases cannot establish a microphone-performance difference. OnePlus (UK) — OnePlus Buds 4 Specs Sennheiser HD 800 S No source recorded.	-38 ± 1 dB	Not provided

Companion app Sources OnePlus Buds 4 Manufacturer specification · Golden Sound (and OnePlus 3D Audio) is set in 'Earbuds Function' on OnePlus phones with Android 12 and above; other users (iOS / Android 7.0 and above) need the HeyMelody app. The specification page also lists OTA updates. OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (UK) — OnePlus Buds 4 overview Sennheiser HD 800 S No source recorded.	Compatible with the HeyMelody app. Sound features: Sound Master EQ (Balanced, Serenade and Bass Mode presets, a customisable six-band EQ and BassWave); Golden Sound personal audio profile from an ear scan and listening test	Not provided
Find My Earbuds Sources OnePlus Buds 4 Manufacturer specification · Listed by name only; OnePlus does not describe how it works on these pages. OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (UK) — OnePlus Buds 4 overview Sennheiser HD 800 S No source recorded.	Yes	Not provided
AI Translation Sources OnePlus Buds 4 Manufacturer specification · Three earbud taps activate AI Translation on the OnePlus phone; available on select OnePlus devices with OxygenOS 15.0.1 and above. OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (UK) — OnePlus Buds 4 overview Sennheiser HD 800 S No source recorded.	Yes	Not provided
Earbud controls Sources OnePlus Buds 4 Manufacturer specification · Single tap must be manually activated in the phone Settings (OnePlus phones) or the HeyMelody app (other Android and iOS). OnePlus also lists a tap for the phone's built-in voice assistant (activated manually in the same way), Double-Tap for Camera Control and three taps for AI Translation on select OnePlus devices. OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (UK) — OnePlus Buds 4 overview Sennheiser HD 800 S No source recorded.	Touch controls on the stem: slide up or down for volume; long touch and hold to switch between Noise Cancellation and Transparency modes; single tap to play or pause; double tap for the next song; triple tap for the previous song	Not provided

Static magnetic field at the surface Sources OnePlus Buds 4 No source recorded. Sennheiser HD 800 S Manufacturer specification · Static magnetic field at the headphone surface. Sennheiser HD 800 S — manufacturer specifications Sennheiser HD 800 S — current instruction manual	Not provided	10.5 mT
Operating temperature Sources OnePlus Buds 4 No source recorded. Sennheiser HD 800 S Manufacturer specification · Storage −20 °C to +70 °C; relative humidity 10–80% operating and 10–90% storage, non-condensing. Sennheiser HD 800 S — current instruction manual	Not provided	−10 °C to +55 °C

Show unverified (4)Not verified, not provided or conflicting for both products. Kept for completeness; never counted as a difference.

Specifications without verified values for either product
Wireless case charging Sources OnePlus Buds 4 The complete reviewed exact pages list USB-C charging but do not explicitly establish wireless-charging presence or absence. Omission does not mean false. · Manufacturer specification OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (UK) — OnePlus Buds 4 overview Sennheiser HD 800 S No source recorded.	Not listed by the manufacturer	Not provided
Spatial audio head tracking Sources OnePlus Buds 4 No explicit head-tracking presence or absence is established in the complete reviewed Buds4 pages. OnePlus3DAudio alone does not prove head tracking. · Manufacturer specification OnePlus (UK) — OnePlus Buds 4 Specs OnePlus (UK) — OnePlus Buds 4 overview Sennheiser HD 800 S No source recorded.	Not listed by the manufacturer	Not provided
Bone-conduction voice pickup sensor Sources OnePlus Buds 4 The complete reviewed Buds4 pages describe three microphones per side but do not establish VPU presence or absence. · Manufacturer specification OnePlus (UK) — OnePlus Buds 4 Specs Sennheiser HD 800 S No source recorded.	Not listed by the manufacturer	Not provided
Supplied 3.5 mm adapter Sources OnePlus Buds 4 No source recorded. Sennheiser HD 800 S The manual describes using a standard 3.5 mm adapter but does not explicitly say it is supplied or not supplied. It is absent from the reviewed package list; that omission is not a definitive exclusion. · Manufacturer specification Sennheiser HD 800 S — manufacturer specifications Sennheiser HD 800 S — current instruction manual	Not provided	Not listed by the manufacturer

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.