HEADPHONES · YOUR NEXT FACE-OFF

Google Pixel Buds 2a vs Sennheiser HD 650

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

Compared products

YOUR FIRST CHOICE

Google Pixel Buds 2a

Hazel · UK

Full product profile Official image

Exact model & source notes

Pixel Buds 2a are Google's noise-cancelling true wireless earbuds, with a Google Tensor A1 chip, Bluetooth 5.4 and an 11 mm dynamic driver in each earbud. This record is the Hazel colour from the UK Google Store; Google rates the earbuds at up to 7 hours with ANC on and 20 hours with the USB-C charging 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 Google Pixel Buds 2a 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

Google Pixel Buds 2a 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.

Google Pixel Buds 2aNot 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

Google Pixel Buds 2aBluetooth 5.4 (each earbud); USB-C charging port on the case

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

Sources

Google Pixel Buds 2a

Manufacturer specification · No wireless charging is listed for this case. Google states it pairs with any Bluetooth 4.0+ device; full feature access needs a Google Account, an Android 6.0+ companion phone and an internet connection. No codec list is published on the specification page.

Google Store (UK) — Pixel Buds 2a Technical Specs

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

Google Pixel Buds 2aCustom-designed 11 mm dynamic driver (each earbud)

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

Google Pixel Buds 2a

Manufacturer specification

Google Store (UK) — Pixel Buds 2a Technical Specs

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

Google Pixel Buds 2aIn-ear, true wireless (eartips in four sizes)

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

Sources

Google Pixel Buds 2a

Manufacturer specification · Two separate earbuds with a charging case; eartips in four size options (extra small, small, medium attached to earbuds, large) are in the box. Google does not state the eartip material.

Google Store (UK) — Pixel Buds 2a Technical Specs

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 (27)

Acoustic design

Google Pixel Buds 2aNot verified

Sennheiser HD 650Open-back

Sources

Google Pixel Buds 2a

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

Google Pixel Buds 2aYes

Sennheiser HD 650Not verified

Sources

Google Pixel Buds 2a

Manufacturer specification · Active Noise Cancellation with Silent Seal 1.5, plus Transparency mode and active in-ear pressure relief.

Google Store (UK) — Pixel Buds 2a Technical Specs

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

Google Pixel Buds 2aYes

Sennheiser HD 650Not verified

Sources

Google Pixel Buds 2a

Manufacturer specification · Two microphones per earbud; Clear Calling and wind-blocking mesh covers.

Google Store (UK) — Pixel Buds 2a Technical Specs

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

Google Pixel Buds 2aEarbuds: up to 7 hours with Active Noise Cancellation on, up to 10 hours with it off. With the charging case: up to 20 hours total with ANC on, up to 27 hours with ANC off. A 5-minute charge in the case gives up to 1 hour with ANC on.

Sennheiser HD 650Not verified

Sources

Google Pixel Buds 2a

Manufacturer specification · Google's stated listening-time ratings on the UK and US specification pages; the page gives no further test conditions.

Google Store (UK) — Pixel Buds 2a Technical Specs Google Store (US) — Pixel Buds 2a Technical Specs

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

Google Pixel Buds 2aNot verified

Sennheiser HD 650300 ohm

Sources

Google Pixel Buds 2a

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.

Included and optional cables

Google Pixel Buds 2aNot verified

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

Sources

Google Pixel Buds 2a

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

Google Pixel Buds 2aNot verified

Sennheiser HD 6503 m

Sources

Google Pixel Buds 2a

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.

Headphone chip

Google Pixel Buds 2aGoogle Tensor A1 (each earbud)

Sennheiser HD 650Not verified

Sources

Google Pixel Buds 2a

Manufacturer specification

Google Store (UK) — Pixel Buds 2a Technical Specs

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

Google Pixel Buds 2aNot verified

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

Sources

Google Pixel Buds 2a

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

Google Pixel Buds 2aNot verified

Sennheiser HD 650Approximately 6.0 N ±1.0 N

Sources

Google Pixel Buds 2a

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

Google Pixel Buds 2aCapacitive touch (tap) for music, calls and voice assistant; IR proximity in-ear detection

Sennheiser HD 650Not verified

Sources

Google Pixel Buds 2a

Manufacturer specification

Google Store (UK) — Pixel Buds 2a Technical Specs

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

Google Pixel Buds 2aNot verified

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

Sources

Google Pixel Buds 2a

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

Google Pixel Buds 2aNot verified

Sennheiser HD 65042 mm

Sources

Google Pixel Buds 2a

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

Google Pixel Buds 2aNot verified

Sennheiser HD 650Velour ear pads; replaceable

Sources

Google Pixel Buds 2a

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.

Frequency equalisation

Google Pixel Buds 2aNot verified

Sennheiser HD 650Diffuse-field equalised

Sources

Google Pixel Buds 2a

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

Google Pixel Buds 2aNot verified

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

Sources

Google Pixel Buds 2a

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.

Supplied 3.5 mm adapter

Google Pixel Buds 2aNot verified

Sennheiser HD 650Yes

Sources

Google Pixel Buds 2a

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

Google Pixel Buds 2aNot verified

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

Sources

Google Pixel Buds 2a

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

Google Pixel Buds 2aNot verified

Sennheiser HD 6501.8 mT

Sources

Google Pixel Buds 2a

No source recorded for this side.

Sennheiser HD 650

Manufacturer specification · Static magnetic field at the headphone surface.

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

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

Operating temperature

Google Pixel Buds 2aNot verified

Sennheiser HD 650−10 °C to +55 °C

Sources

Google Pixel Buds 2a

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.

Security updates

Google Pixel Buds 2aAutomatic security updates for at least three years

Sennheiser HD 650Not verified

Sources

Google Pixel Buds 2a

Manufacturer specification · Counted from when the device first became available on the Google Store in the US.

Google Store (UK) — Pixel Buds 2a Technical Specs

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

Google Pixel Buds 2aNot verified

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

Sources

Google Pixel Buds 2a

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.

Replaceable parts

Google Pixel Buds 2aNot verified

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

Sources

Google Pixel Buds 2a

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.

Dust, sweat and water resistance

Google Pixel Buds 2aEarbuds IP54; case IPX4

Sennheiser HD 650Not verified

Sources

Google Pixel Buds 2a

Manufacturer specification

Google Store (UK) — Pixel Buds 2a Technical Specs

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

Google Pixel Buds 2a4.7 g

Sennheiser HD 650Not verified

Sources

Google Pixel Buds 2a

Manufacturer specification · Each earbud with the medium eartip. The charging case weighs 47.6 g with the earbuds inside.

Google Store (UK) — Pixel Buds 2a Technical Specs Google Store (US) — Pixel Buds 2a Technical Specs

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

Google Pixel Buds 2aEach earbud (with medium eartip): 23.1 x 16.0 x 17.8 mm; charging case: 50.0 x 24.5 x 57.2 mm

Sennheiser HD 650Not verified

Sources

Google Pixel Buds 2a

Manufacturer specification

Google Store (UK) — Pixel Buds 2a Technical Specs Google Store (US) — Pixel Buds 2a Technical Specs

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

Google Pixel Buds 2aNot verified

Sennheiser HD 650260 g

Sources

Google Pixel Buds 2a

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

Google Pixel Buds 2a

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

Google Pixel Buds 2a

What it brings

Active Noise Cancellation with Silent Seal 1.5, Transparency mode and in-ear pressure relief are included, powered by the Tensor A1 chip in each earbud.
Manufacturer source
The charging case weighs 47.6 g with the earbuds inside and measures 50.0 x 24.5 x 57.2 mm; each earbud weighs 4.7 g with the medium eartip.
Manufacturer source

What to check

The case charges only over USB-C; Google lists no wireless charging and no case speaker for this model, and the earbuds have two microphones each and tap-only touch controls.
Manufacturer source
Rated ANC-on battery is 7 hours per charge and 20 hours with the case. Full feature access requires a Google Account and an Android 6.0 or newer phone.
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

30 of 30 specifications Sources in each row

Source-backed specifications for Google Pixel Buds 2a and Sennheiser HD 650
Specification	Google Pixel Buds 2a	Sennheiser HD 650

Wearing styleDifferent Sources Google Pixel Buds 2a Manufacturer specification · Two separate earbuds with a charging case; eartips in four size options (extra small, small, medium attached to earbuds, large) are in the box. Google does not state the eartip material. Google Store (UK) — Pixel Buds 2a Technical Specs Sennheiser HD 650 Manufacturer specification Sennheiser HD 650 — manufacturer specifications	In-ear, true wireless (eartips in four sizes)	Over-ear (circumaural), open-back dynamic headphones
Weight Sources Google Pixel Buds 2a Manufacturer specification · Each earbud with the medium eartip. The charging case weighs 47.6 g with the earbuds inside. Google Store (UK) — Pixel Buds 2a Technical Specs Google Store (US) — Pixel Buds 2a Technical Specs Sennheiser HD 650 No source recorded.	4.7 g	Not provided
Dimensions Sources Google Pixel Buds 2a Manufacturer specification Google Store (UK) — Pixel Buds 2a Technical Specs Google Store (US) — Pixel Buds 2a Technical Specs Sennheiser HD 650 No source recorded.	Each earbud (with medium eartip): 23.1 x 16.0 x 17.8 mm; charging case: 50.0 x 24.5 x 57.2 mm	Not provided
Dust, sweat and water resistance Sources Google Pixel Buds 2a Manufacturer specification Google Store (UK) — Pixel Buds 2a Technical Specs Sennheiser HD 650 No source recorded.	Earbuds IP54; case IPX4	Not provided
Weight Sources Google Pixel Buds 2a No source recorded. Sennheiser HD 650 Manufacturer specification · Approximate, without the cable. Sennheiser HD 650 — manufacturer specifications	Not provided	260 g
Acoustic design Sources Google Pixel Buds 2a No source recorded. Sennheiser HD 650 Manufacturer specification Sennheiser HD 650 — manufacturer specifications	Not provided	Open-back
Replaceable parts Sources Google Pixel Buds 2a 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 Google Pixel Buds 2a 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 Google Pixel Buds 2a 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 Google Pixel Buds 2a Manufacturer specification · No wireless charging is listed for this case. Google states it pairs with any Bluetooth 4.0+ device; full feature access needs a Google Account, an Android 6.0+ companion phone and an internet connection. No codec list is published on the specification page. Google Store (UK) — Pixel Buds 2a Technical Specs 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 5.4 (each earbud); USB-C charging port on the case	Wired analogue; detachable 6.35 mm unbalanced cable and included 3.5 mm adapter
Battery life Sources Google Pixel Buds 2a Manufacturer specification · Google's stated listening-time ratings on the UK and US specification pages; the page gives no further test conditions. Google Store (UK) — Pixel Buds 2a Technical Specs Google Store (US) — Pixel Buds 2a Technical Specs 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	Earbuds: up to 7 hours with Active Noise Cancellation on, up to 10 hours with it off. With the charging case: up to 20 hours total with ANC on, up to 27 hours with ANC off. A 5-minute charge in the case gives up to 1 hour with ANC on.	Not listed by the manufacturer
Included cable length Sources Google Pixel Buds 2a 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 Google Pixel Buds 2a 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 Google Pixel Buds 2a 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

Headphone chip Sources Google Pixel Buds 2a Manufacturer specification Google Store (UK) — Pixel Buds 2a Technical Specs Sennheiser HD 650 No source recorded.	Google Tensor A1 (each earbud)	Not provided
DriversDifferent Sources Google Pixel Buds 2a Manufacturer specification Google Store (UK) — Pixel Buds 2a Technical Specs 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	Custom-designed 11 mm dynamic driver (each earbud)	42 mm dynamic transducer with 38 mm diaphragm and aluminium voice coil; acoustic mesh and hand-paired transducers within stated ±1 dB tolerance
Nominal impedance Sources Google Pixel Buds 2a 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 Google Pixel Buds 2a 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 Google Pixel Buds 2a 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 Google Pixel Buds 2a 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 Google Pixel Buds 2a No source recorded. Sennheiser HD 650 Manufacturer specification Sennheiser HD 650 — manufacturer specifications	Not provided	Diffuse-field equalised
Rated total harmonic distortion Sources Google Pixel Buds 2a 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 Google Pixel Buds 2a 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 Google Pixel Buds 2a Manufacturer specification · Two microphones per earbud; Clear Calling and wind-blocking mesh covers. Google Store (UK) — Pixel Buds 2a Technical Specs 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 Google Pixel Buds 2a Manufacturer specification · Active Noise Cancellation with Silent Seal 1.5, plus Transparency mode and active in-ear pressure relief. Google Store (UK) — Pixel Buds 2a Technical Specs 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

Earbud controls Sources Google Pixel Buds 2a Manufacturer specification Google Store (UK) — Pixel Buds 2a Technical Specs Sennheiser HD 650 No source recorded.	Capacitive touch (tap) for music, calls and voice assistant; IR proximity in-ear detection	Not provided
Security updates Sources Google Pixel Buds 2a Manufacturer specification · Counted from when the device first became available on the Google Store in the US. Google Store (UK) — Pixel Buds 2a Technical Specs Sennheiser HD 650 No source recorded.	Automatic security updates for at least three years	Not provided

Supplied 3.5 mm adapter Sources Google Pixel Buds 2a 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 Google Pixel Buds 2a 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 Google Pixel Buds 2a No source recorded. Sennheiser HD 650 Manufacturer specification Sennheiser HD 650 — manufacturer specifications	Not provided	−10 °C to +55 °C

First product manufacturer source Second product manufacturer source

FIND YOUR CONTENDERS

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Google Pixel Buds Pro 2

Weight per earbud: 4.7 g
Wearing style: In-ear, true wireless (eartips in four sizes)
Wired / wireless connections: Bluetooth 5.4 (each earbud); USB-C charging port and Qi-certified wireless charging on the case

Prices & product profile

Beyerdynamic MMX 330 PRO

Impedance: 48 Ω
Cable length: 2.5 m
Wearing style: Over-ear (circumaural), open-back wired gaming headset with boom microphone

Prices & product profile

Sony INZONE H9 II

Cable length: 2 m
Wearing style: Closed over-ear dynamic gaming headset
Wired / wireless connections: 2.4 GHz USB-C transceiver, Bluetooth 5.3 Classic Audio or LE Audio, or supplied analogue headphone cable

Prices & product profile

Sennheiser HD 800 S

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

Prices & product profile

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