HEADPHONES · YOUR NEXT FACE-OFF

Apple AirPods Pro 3 vs Sennheiser HD 660S2

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

Compared products

YOUR FIRST CHOICE

Apple AirPods Pro 3

MFHP4ZM/A · MagSafe Charging Case (USB-C) · UK

Full product profile Official image

Exact model & source notes

AirPods Pro 3 (MFHP4ZM/A in the UK, MFHP4LL/A in the US) are Apple's true wireless earbuds with silicone ear tips in five sizes, active noise cancellation, the H2 chip and a heart-rate sensor for workouts. Apple rates them at up to 8 hours with ANC on and up to 24 hours with the MagSafe 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 Apple AirPods Pro 3 for

A wireless connection

Choose the Sennheiser HD 660S2 for

A wired connection

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

See the 2 verified differences

THE CONTENDER

Sennheiser HD 660S2

700240 · black with bronze accents · 300 ohm · 1.8 m balanced and unbalanced cables

Full product profile Official image

Exact model & source notes

The HD 660S2 is an open-back, over-ear headphone with a 38 mm dynamic driver rated 8–41,500 Hz (−10 dB) at 300 ohms. Sennheiser revised its acoustics for stronger sub-bass, and it ships with 1.8 m 6.35 mm unbalanced and 4.4 mm balanced cables plus a 3.5 mm adapter.

Specifications checked 11 Sept 2026.

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

Manufacturer specifications

Apple AirPods Pro 3 UK & US retailers

UK & US price history: no verified listing yet

Sennheiser HD 660S2 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.

Apple AirPods Pro 3Not verified

Sennheiser HD 660S2Yes

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 ↓

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

Wired / wireless connections

Apple AirPods Pro 3Bluetooth 5.3; MagSafe Charging Case works with MagSafe, Apple Watch and Qi-certified chargers or USB-C

Sennheiser HD 660S2Wired analogue stereo; 1.8 m cables with 6.35 mm unbalanced and 4.4 mm balanced plugs; included 3.5 mm adapter

Sources

Apple AirPods Pro 3

Manufacturer specification · USB-C charge cable sold separately.

Apple (UK) — AirPods Pro 3 Technical Specifications

Sennheiser HD 660S2

Manufacturer specification

Sennheiser HD 660S2 — exact model specifications Sennheiser HD 660S2 — operating guide and specifications

Check the exact configuration and source conditions for your use.

Wearing style

Apple AirPods Pro 3In-ear, true wireless (silicone ear tips in five sizes)

Sennheiser HD 660S2Over-ear (circumaural), open-back dynamic headphones

Sources

Apple AirPods Pro 3

Manufacturer specification

Apple (UK) — AirPods Pro 3 Technical Specifications

Sennheiser HD 660S2

Manufacturer specification

Sennheiser HD 660S2 — operating guide and specifications

Check the exact configuration and source conditions for your use.

Missing or non-comparable evidence (29)

Acoustic design

Apple AirPods Pro 3Not verified

Sennheiser HD 660S2Open-back

Sources

Apple AirPods Pro 3

No source recorded for this side.

Sennheiser HD 660S2

Manufacturer specification

Sennheiser HD 660S2 — operating guide and specifications

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

Active noise cancellation

Apple AirPods Pro 3Yes

Sennheiser HD 660S2Not verified

Sources

Apple AirPods Pro 3

Manufacturer specification · Active Noise Cancellation, Transparency mode and Adaptive Audio.

Apple (UK) — AirPods Pro 3 Technical Specifications

Sennheiser HD 660S2

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

Sennheiser HD 660S2 — operating guide and specifications

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

Microphone

In Visual facts

Apple AirPods Pro 3Yes

Sennheiser HD 660S2Not verified

Sources

Apple AirPods Pro 3

Manufacturer specification · Dual beamforming microphones plus an inward-facing microphone.

Apple (UK) — AirPods Pro 3 Technical Specifications

Sennheiser HD 660S2

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

Sennheiser HD 660S2 — operating guide and specifications

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

Battery life

Apple AirPods Pro 3Earbuds: up to 8 hours per charge with Active Noise Cancellation on (7.5 hours with Spatial Audio and head tracking); up to 6.5 hours with heart-rate sensing during workouts; up to 10 hours in Transparency using the Hearing Aid feature. With the MagSafe Charging Case: up to 24 hours with Active Noise Cancellation on. 5 minutes in the case gives around 1 hour. Apple does not publish an ANC-off figure.

Sennheiser HD 660S2Not verified

Sources

Apple AirPods Pro 3

Manufacturer specification · Apple's tests (July–August 2025, pre-production units paired with iPhone 17 Pro, 50% volume) ran until the first earbud stopped.

Apple (UK) — AirPods Pro 3 Technical Specifications

Sennheiser HD 660S2

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

Sennheiser HD 660S2 — operating guide and specifications

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

Nominal impedance

Apple AirPods Pro 3Not verified

Sennheiser HD 660S2300 ohm

Sources

Apple AirPods Pro 3

No source recorded for this side.

Sennheiser HD 660S2

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

Sennheiser HD 660S2 — operating guide and specifications

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

Driver construction

Apple AirPods Pro 3Not verified

Sennheiser HD 660S238 mm open dynamic transducer; aluminium voice coil and vented magnet system

Sources

Apple AirPods Pro 3

No source recorded for this side.

Sennheiser HD 660S2

Manufacturer specification · Sennheiser lists 38 mm as the transducer size.

Sennheiser HD 660S2 — exact model specifications

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

Published acoustic changes

Apple AirPods Pro 3Not verified

Sennheiser HD 660S2Revised 300-ohm coil, more compliant surround, 70 Hz resonance and revised transducer airflow

Sources

Apple AirPods Pro 3

No source recorded for this side.

Sennheiser HD 660S2

Manufacturer specification · Sennheiser describes these changes as the S2 revision of the HD 660S.

Sennheiser HD 660S2 — exact model specifications

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

Included and optional cables

Apple AirPods Pro 3Not verified

Sennheiser HD 660S2Detachable 1.8 m unbalanced and 4.4 mm balanced cables included; XLR-4 cable optional

Sources

Apple AirPods Pro 3

No source recorded for this side.

Sennheiser HD 660S2

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

Sennheiser HD 660S2 — exact model specifications Sennheiser HD 660S2 — operating guide and specifications

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

Included cable length

Apple AirPods Pro 3Not verified

Sennheiser HD 660S21.8 m

Sources

Apple AirPods Pro 3

No source recorded for this side.

Sennheiser HD 660S2

Manufacturer specification · Length of the supplied cable.

Sennheiser HD 660S2 — operating guide and specifications

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

Case speaker for Find My

Apple AirPods Pro 3Yes

Sennheiser HD 660S2Not verified

Sources

Apple AirPods Pro 3

Manufacturer specification

Apple (UK) — AirPods Pro 3 Technical Specifications

Sennheiser HD 660S2

No source recorded for this side.

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

Headphone chip

Apple AirPods Pro 3Apple H2 headphone chip; second-generation Ultra Wideband chip in the case

Sennheiser HD 660S2Not verified

Sources

Apple AirPods Pro 3

Manufacturer specification

Apple (UK) — AirPods Pro 3 Technical Specifications

Sennheiser HD 660S2

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

Apple AirPods Pro 3Not verified

Sennheiser HD 660S26.35 mm unbalanced cable; 4.4 mm balanced cable; 6.35 mm-to-3.5 mm adapter

Sources

Apple AirPods Pro 3

No source recorded for this side.

Sennheiser HD 660S2

Manufacturer specification · The 4.4 mm balanced cable needs a balanced headphone output; an XLR-4 cable is optional.

Sennheiser HD 660S2 — exact model specifications Sennheiser HD 660S2 — operating guide and specifications

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

Rated contact pressure

Apple AirPods Pro 3Not verified

Sennheiser HD 660S2Approximately 6.0 N ±1.0 N

Sources

Apple AirPods Pro 3

No source recorded for this side.

Sennheiser HD 660S2

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

Sennheiser HD 660S2 — operating guide and specifications

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

Earbud controls

Apple AirPods Pro 3Touch control: press controls (play/pause, answer/mute, camera remote, end call, skip forward/back, hold to switch listening modes) plus swipe up or down for volume

Sennheiser HD 660S2Not verified

Sources

Apple AirPods Pro 3

Manufacturer specification

Apple (UK) — AirPods Pro 3 Technical Specifications

Sennheiser HD 660S2

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

Apple AirPods Pro 3Not verified

Sennheiser HD 660S2≤0.04% at 1 kHz, 100 dB SPL

Sources

Apple AirPods Pro 3

No source recorded for this side.

Sennheiser HD 660S2

Manufacturer specification · Rated at 1 kHz and 100 dB SPL; other models use different test levels, so compare with care.

Sennheiser HD 660S2 — exact model specifications Sennheiser HD 660S2 — operating guide and specifications

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

Ear pads

Apple AirPods Pro 3Not verified

Sennheiser HD 660S2Velour ear pads; replaceable

Sources

Apple AirPods Pro 3

No source recorded for this side.

Sennheiser HD 660S2

Manufacturer specification · Replacement procedure shown in the manual.

Sennheiser HD 660S2 — exact model specifications Sennheiser HD 660S2 — operating guide and specifications

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

Frequency equalisation

Apple AirPods Pro 3Not verified

Sennheiser HD 660S2Diffuse-field equalised

Sources

Apple AirPods Pro 3

No source recorded for this side.

Sennheiser HD 660S2

Manufacturer specification

Sennheiser HD 660S2 — operating guide and specifications

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

Rated frequency range

Apple AirPods Pro 3Not verified

Sennheiser HD 660S28–41,500 Hz (−10 dB)

Sources

Apple AirPods Pro 3

No source recorded for this side.

Sennheiser HD 660S2

Manufacturer specification

Sennheiser HD 660S2 — operating guide and specifications

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

Health and hearing features

Apple AirPods Pro 3Heart-rate sensor for workouts; Hearing Test, Hearing Aid and Hearing Protection

Sennheiser HD 660S2Not verified

Sources

Apple AirPods Pro 3

Manufacturer specification · Hearing features depend on compatible Apple devices, software and regional availability.

Apple (UK) — AirPods Pro 3 Technical Specifications

Sennheiser HD 660S2

No source recorded for this side.

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

Rated long-term input power

Apple AirPods Pro 3Not verified

Sennheiser HD 660S2Maximum 500 mW under EN 60-268-7

Sources

Apple AirPods Pro 3

No source recorded for this side.

Sennheiser HD 660S2

Manufacturer specification · Rated to EN 60-268-7; the maximum input the headphones can handle, not the amplifier power they need.

Sennheiser HD 660S2 — operating guide and specifications

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

Static magnetic field at the surface

Apple AirPods Pro 3Not verified

Sennheiser HD 660S24.5 mT

Sources

Apple AirPods Pro 3

No source recorded for this side.

Sennheiser HD 660S2

Manufacturer specification · Static magnetic field at the headphone surface.

Sennheiser HD 660S2 — exact model specifications Sennheiser HD 660S2 — operating guide and specifications

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

Operating temperature

Apple AirPods Pro 3Not verified

Sennheiser HD 660S2−10 °C to +55 °C

Sources

Apple AirPods Pro 3

No source recorded for this side.

Sennheiser HD 660S2

Manufacturer specification

Sennheiser HD 660S2 — operating guide and specifications

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

Rated sensitivity

Apple AirPods Pro 3Not verified

Sennheiser HD 660S2104 dB SPL at 1 kHz, 1 V rms

Sources

Apple AirPods Pro 3

No source recorded for this side.

Sennheiser HD 660S2

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

Sennheiser HD 660S2 — operating guide and specifications

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

Replaceable parts

Apple AirPods Pro 3Not verified

Sennheiser HD 660S2Detachable cable and replaceable ear pads

Sources

Apple AirPods Pro 3

No source recorded for this side.

Sennheiser HD 660S2

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

Sennheiser HD 660S2 — operating guide and specifications

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

Spatial audio

Apple AirPods Pro 3Personalised Spatial Audio with dynamic head tracking

Sennheiser HD 660S2Not verified

Sources

Apple AirPods Pro 3

Manufacturer specification · Apple: compatible hardware and software required; works with compatible content in supported apps. An iPhone with TrueDepth camera is required to create the personal profile for Spatial Audio.

Apple (UK) — AirPods Pro 3 Technical Specifications

Sennheiser HD 660S2

No source recorded for this side.

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

Manufacturer sub-bass claim

Apple AirPods Pro 3Not verified

Sennheiser HD 660S2Double the sound pressure at the lowest frequencies

Sources

Apple AirPods Pro 3

No source recorded for this side.

Sennheiser HD 660S2

Manufacturer specification · Sennheiser does not give the frequency range or comparison model for this claim.

Sennheiser HD 660S2 — exact model specifications

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

Dust, sweat and water resistance

Apple AirPods Pro 3IP57 (earbuds and charging case)

Sennheiser HD 660S2Not verified

Sources

Apple AirPods Pro 3

Manufacturer specification

Apple (UK) — AirPods Pro 3 Technical Specifications

Sennheiser HD 660S2

No source recorded for this side.

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

Weight

Apple AirPods Pro 35.55 g

Sennheiser HD 660S2Not verified

Sources

Apple AirPods Pro 3

Manufacturer specification · Each earbud. The MagSafe Charging Case weighs 43.99 g.

Apple (UK) — AirPods Pro 3 Technical Specifications

Sennheiser HD 660S2

No source recorded for this side.

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

Weight

Apple AirPods Pro 3Not verified

Sennheiser HD 660S2260 g

Sources

Apple AirPods Pro 3

No source recorded for this side.

Sennheiser HD 660S2

Manufacturer specification · Approximate, without the cable.

Sennheiser HD 660S2 — operating guide and 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

Apple AirPods Pro 3

Select a feature to check your fit.

YOUR CHOICE

Sennheiser HD 660S2

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

Apple AirPods Pro 3

What it brings

Five ear-tip sizes (XXS to L) are included, and Apple lists hearing features — Hearing Test, Hearing Aid and Hearing Protection — plus a heart-rate sensor for workouts.
Manufacturer source
The earbuds and case are rated IP57, and the case charges from MagSafe, Apple Watch, Qi or USB-C chargers, with a Find My speaker and Ultra Wideband chip.
Manufacturer source

What to check

No USB-C cable is included, and Apple publishes battery figures only with ANC on or with specific features in use, not with noise control off.
Manufacturer source
At 5.55 g each the earbuds are heavier than AirPods 5 (4.3 g), and the 43.99 g case is also heavier. Many features, such as hearing tools and Personalised Spatial Audio, need compatible Apple devices.
Manufacturer source Manufacturer source

Sennheiser HD 660S2

What it brings

Both a 4.4 mm balanced and a 6.35 mm unbalanced cable are included with a 3.5 mm adapter, and the velour ear pads are replaceable.
Manufacturer source Manufacturer source
A revised 300-ohm voice coil, more compliant surround and vented magnet system are designed for more sub-bass, and sensitivity is rated at 104 dB SPL at 1 V.
Manufacturer source Manufacturer source

What to check

At 300 ohms with a rated 104 dB SPL at 1 kHz / 1 V rms, check that your amplifier or audio source can drive the headphones properly.
Manufacturer source Manufacturer source
The open-back design leaks sound and lets outside noise in, and the supplied cables are 1.8 m long. An XLR-4 cable is sold separately.
Manufacturer source Manufacturer source

COMPARE THE DETAILS

Full specifications

How we verify

Differences only

31 of 31 specifications Sources in each row

Source-backed specifications for Apple AirPods Pro 3 and Sennheiser HD 660S2
Specification	Apple AirPods Pro 3	Sennheiser HD 660S2

Wearing styleDifferent Sources Apple AirPods Pro 3 Manufacturer specification Apple (UK) — AirPods Pro 3 Technical Specifications Sennheiser HD 660S2 Manufacturer specification Sennheiser HD 660S2 — operating guide and specifications	In-ear, true wireless (silicone ear tips in five sizes)	Over-ear (circumaural), open-back dynamic headphones
Weight Sources Apple AirPods Pro 3 Manufacturer specification · Each earbud. The MagSafe Charging Case weighs 43.99 g. Apple (UK) — AirPods Pro 3 Technical Specifications Sennheiser HD 660S2 No source recorded.	5.55 g	Not provided
Dust, sweat and water resistance Sources Apple AirPods Pro 3 Manufacturer specification Apple (UK) — AirPods Pro 3 Technical Specifications Sennheiser HD 660S2 No source recorded.	IP57 (earbuds and charging case)	Not provided
Weight Sources Apple AirPods Pro 3 No source recorded. Sennheiser HD 660S2 Manufacturer specification · Approximate, without the cable. Sennheiser HD 660S2 — operating guide and specifications	Not provided	260 g
Acoustic design Sources Apple AirPods Pro 3 No source recorded. Sennheiser HD 660S2 Manufacturer specification Sennheiser HD 660S2 — operating guide and specifications	Not provided	Open-back
Replaceable parts Sources Apple AirPods Pro 3 No source recorded. Sennheiser HD 660S2 Manufacturer specification · Replacement procedures are in the manual; spare-part availability varies. Sennheiser HD 660S2 — operating guide and specifications	Not provided	Detachable cable and replaceable ear pads
Ear pads Sources Apple AirPods Pro 3 No source recorded. Sennheiser HD 660S2 Manufacturer specification · Replacement procedure shown in the manual. Sennheiser HD 660S2 — exact model specifications Sennheiser HD 660S2 — operating guide and specifications	Not provided	Velour ear pads; replaceable
Rated contact pressure Sources Apple AirPods Pro 3 No source recorded. Sennheiser HD 660S2 Manufacturer specification · Nominal clamping force; individual fit and comfort can differ. Sennheiser HD 660S2 — operating guide and specifications	Not provided	Approximately 6.0 N ±1.0 N

Wired / wireless connectionsDifferent Sources Apple AirPods Pro 3 Manufacturer specification · USB-C charge cable sold separately. Apple (UK) — AirPods Pro 3 Technical Specifications Sennheiser HD 660S2 Manufacturer specification Sennheiser HD 660S2 — exact model specifications Sennheiser HD 660S2 — operating guide and specifications	Bluetooth 5.3; MagSafe Charging Case works with MagSafe, Apple Watch and Qi-certified chargers or USB-C	Wired analogue stereo; 1.8 m cables with 6.35 mm unbalanced and 4.4 mm balanced plugs; included 3.5 mm adapter
Battery life Sources Apple AirPods Pro 3 Manufacturer specification · Apple's tests (July–August 2025, pre-production units paired with iPhone 17 Pro, 50% volume) ran until the first earbud stopped. Apple (UK) — AirPods Pro 3 Technical Specifications Sennheiser HD 660S2 The reviewed exact sources do not explicitly establish battery life or that no battery is required for operation. A wired/dynamic audio path, omitted charger or Battery included N is not an explicit operating-power requirement. · Manufacturer specification Sennheiser HD 660S2 — operating guide and specifications	Earbuds: up to 8 hours per charge with Active Noise Cancellation on (7.5 hours with Spatial Audio and head tracking); up to 6.5 hours with heart-rate sensing during workouts; up to 10 hours in Transparency using the Hearing Aid feature. With the MagSafe Charging Case: up to 24 hours with Active Noise Cancellation on. 5 minutes in the case gives around 1 hour. Apple does not publish an ANC-off figure.	Not listed by the manufacturer
Included cable length Sources Apple AirPods Pro 3 No source recorded. Sennheiser HD 660S2 Manufacturer specification · Length of the supplied cable. Sennheiser HD 660S2 — operating guide and specifications	Not provided	1.8 m
Supplied plug configuration Sources Apple AirPods Pro 3 No source recorded. Sennheiser HD 660S2 Manufacturer specification · The 4.4 mm balanced cable needs a balanced headphone output; an XLR-4 cable is optional. Sennheiser HD 660S2 — exact model specifications Sennheiser HD 660S2 — operating guide and specifications	Not provided	6.35 mm unbalanced cable; 4.4 mm balanced cable; 6.35 mm-to-3.5 mm adapter
Included and optional cables Sources Apple AirPods Pro 3 No source recorded. Sennheiser HD 660S2 Manufacturer specification · Optional cables are sold separately; balanced cables need a balanced headphone output. Sennheiser HD 660S2 — exact model specifications Sennheiser HD 660S2 — operating guide and specifications	Not provided	Detachable 1.8 m unbalanced and 4.4 mm balanced cables included; XLR-4 cable optional

Headphone chip Sources Apple AirPods Pro 3 Manufacturer specification Apple (UK) — AirPods Pro 3 Technical Specifications Sennheiser HD 660S2 No source recorded.	Apple H2 headphone chip; second-generation Ultra Wideband chip in the case	Not provided
Spatial audio Sources Apple AirPods Pro 3 Manufacturer specification · Apple: compatible hardware and software required; works with compatible content in supported apps. An iPhone with TrueDepth camera is required to create the personal profile for Spatial Audio. Apple (UK) — AirPods Pro 3 Technical Specifications Sennheiser HD 660S2 No source recorded.	Personalised Spatial Audio with dynamic head tracking	Not provided
Nominal impedance Sources Apple AirPods Pro 3 No source recorded. Sennheiser HD 660S2 Manufacturer specification · Nominal impedance; check that your amplifier or audio source can drive this load. Sennheiser HD 660S2 — operating guide and specifications	Not provided	300 ohm
Rated frequency range Sources Apple AirPods Pro 3 No source recorded. Sennheiser HD 660S2 Manufacturer specification Sennheiser HD 660S2 — operating guide and specifications	Not provided	8–41,500 Hz (−10 dB)
Rated sensitivity Sources Apple AirPods Pro 3 No source recorded. Sennheiser HD 660S2 Manufacturer specification · Rated at 1 kHz with 1 V rms; not directly comparable with dB/mW ratings. Sennheiser HD 660S2 — operating guide and specifications	Not provided	104 dB SPL at 1 kHz, 1 V rms
Driver construction Sources Apple AirPods Pro 3 No source recorded. Sennheiser HD 660S2 Manufacturer specification · Sennheiser lists 38 mm as the transducer size. Sennheiser HD 660S2 — exact model specifications	Not provided	38 mm open dynamic transducer; aluminium voice coil and vented magnet system
Frequency equalisation Sources Apple AirPods Pro 3 No source recorded. Sennheiser HD 660S2 Manufacturer specification Sennheiser HD 660S2 — operating guide and specifications	Not provided	Diffuse-field equalised
Rated total harmonic distortion Sources Apple AirPods Pro 3 No source recorded. Sennheiser HD 660S2 Manufacturer specification · Rated at 1 kHz and 100 dB SPL; other models use different test levels, so compare with care. Sennheiser HD 660S2 — exact model specifications Sennheiser HD 660S2 — operating guide and specifications	Not provided	≤0.04% at 1 kHz, 100 dB SPL
Rated long-term input power Sources Apple AirPods Pro 3 No source recorded. Sennheiser HD 660S2 Manufacturer specification · Rated to EN 60-268-7; the maximum input the headphones can handle, not the amplifier power they need. Sennheiser HD 660S2 — operating guide and specifications	Not provided	Maximum 500 mW under EN 60-268-7
Published acoustic changes Sources Apple AirPods Pro 3 No source recorded. Sennheiser HD 660S2 Manufacturer specification · Sennheiser describes these changes as the S2 revision of the HD 660S. Sennheiser HD 660S2 — exact model specifications	Not provided	Revised 300-ohm coil, more compliant surround, 70 Hz resonance and revised transducer airflow
Manufacturer sub-bass claim Sources Apple AirPods Pro 3 No source recorded. Sennheiser HD 660S2 Manufacturer specification · Sennheiser does not give the frequency range or comparison model for this claim. Sennheiser HD 660S2 — exact model specifications	Not provided	Double the sound pressure at the lowest frequencies

Microphone Sources Apple AirPods Pro 3 Manufacturer specification · Dual beamforming microphones plus an inward-facing microphone. Apple (UK) — AirPods Pro 3 Technical Specifications Sennheiser HD 660S2 The reviewed exact sources do not explicitly establish microphone absence. Omission from a package or technical inventory, a stereo audio connector, and a without-remote statement do not establish microphone=false. · Manufacturer specification Sennheiser HD 660S2 — operating guide and specifications	Yes	Not listed by the manufacturer
Active noise cancellation Sources Apple AirPods Pro 3 Manufacturer specification · Active Noise Cancellation, Transparency mode and Adaptive Audio. Apple (UK) — AirPods Pro 3 Technical Specifications Sennheiser HD 660S2 The reviewed exact sources do not explicitly establish active noise cancellation absence. Preserve separately sourced acoustic design and passive attenuation; they cannot turn omitted ANC into a false capability. · Manufacturer specification Sennheiser HD 660S2 — operating guide and specifications	Yes	Not listed by the manufacturer

Earbud controls Sources Apple AirPods Pro 3 Manufacturer specification Apple (UK) — AirPods Pro 3 Technical Specifications Sennheiser HD 660S2 No source recorded.	Touch control: press controls (play/pause, answer/mute, camera remote, end call, skip forward/back, hold to switch listening modes) plus swipe up or down for volume	Not provided
Health and hearing features Sources Apple AirPods Pro 3 Manufacturer specification · Hearing features depend on compatible Apple devices, software and regional availability. Apple (UK) — AirPods Pro 3 Technical Specifications Sennheiser HD 660S2 No source recorded.	Heart-rate sensor for workouts; Hearing Test, Hearing Aid and Hearing Protection	Not provided
Case speaker for Find My Sources Apple AirPods Pro 3 Manufacturer specification Apple (UK) — AirPods Pro 3 Technical Specifications Sennheiser HD 660S2 No source recorded.	Yes	Not provided

Static magnetic field at the surface Sources Apple AirPods Pro 3 No source recorded. Sennheiser HD 660S2 Manufacturer specification · Static magnetic field at the headphone surface. Sennheiser HD 660S2 — exact model specifications Sennheiser HD 660S2 — operating guide and specifications	Not provided	4.5 mT
Operating temperature Sources Apple AirPods Pro 3 No source recorded. Sennheiser HD 660S2 Manufacturer specification Sennheiser HD 660S2 — operating guide and specifications	Not provided	−10 °C to +55 °C

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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

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Logitech G PRO X wired gaming headset in black with detachable boom microphone

Logitech PRO X Gaming Headset (wired)

Cable length: 2 m
Wearing style: Over-ear (circumaural) wired gaming headset with detachable boom microphone
Wired / wireless connections: Wired: 2 m PC cable with inline volume and mute, 1.5 m mobile cable with button, Y splitter for separate mic and headphone ports, and a USB external sound card (DAC)

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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

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Beyerdynamic MMX 300 PRO

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

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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.