HEADPHONES · YOUR NEXT FACE-OFF

Apple AirPods 5 with Wireless Charging Case vs Sennheiser HD 660S2

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

Compared products

YOUR FIRST CHOICE

Apple AirPods 5 with Wireless Charging Case

Wireless Charging Case

Full product profile Official image

Exact model & source notes

AirPods 5 are Apple’s open-ear Bluetooth earbuds with active noise cancellation and an H2 chip. This Wireless Charging Case configuration includes volume-swipe controls, a Find My case speaker and Apple Watch or Qi case charging. Apple rates listening at up to five hours with ANC on, or seven hours with noise control off.

Specifications checked 17 Oct 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 5 with Wireless Charging Case 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 3 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 5 with Wireless Charging Case 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 5 with Wireless Charging CaseNot 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 ↓

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

Audio connection

Apple AirPods 5 with Wireless Charging CaseBluetooth 5.3

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 5 with Wireless Charging Case

Manufacturer specification · USB-C is listed for case charging; no wired USB audio capability is asserted.

Apple UK — AirPods 5 technical specifications, both case configurations

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.

Driver and amplifier

Apple AirPods 5 with Wireless Charging CaseCustom high-excursion Apple driver; custom high dynamic range amplifier

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

Sources

Apple AirPods 5 with Wireless Charging Case

Manufacturer specification · No driver diameter is stated on the technical specifications page.

Apple UK — AirPods 5 technical specifications, both case configurations

Sennheiser HD 660S2

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

Sennheiser HD 660S2 — exact model specifications

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

Wearing style

Apple AirPods 5 with Wireless Charging CaseOpen-ear wireless earbuds

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

Sources

Apple AirPods 5 with Wireless Charging Case

Manufacturer specification · Apple describes an open-ear design; no silicone ear-tip fit is inferred.

Apple UK — AirPods 5 design and configuration overview

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 (37)

Acoustic design

Apple AirPods 5 with Wireless Charging CaseNot verified

Sennheiser HD 660S2Open-back

Sources

Apple AirPods 5 with Wireless Charging Case

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 5 with Wireless Charging CaseYes

Sennheiser HD 660S2Not verified

Sources

Apple AirPods 5 with Wireless Charging Case

Manufacturer specification · Also supports Adaptive Audio, Transparency and Conversation Awareness; requires compatible software for the listed features.

Apple UK — AirPods 5 technical specifications, both case configurations

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 5 with Wireless Charging CaseYes

Sennheiser HD 660S2Not verified

Sources

Apple AirPods 5 with Wireless Charging Case

Manufacturer specification · Dual beam-forming microphones and inward-facing microphone.

Apple UK — AirPods 5 technical specifications, both case configurations

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 and conditions

Apple AirPods 5 with Wireless Charging CaseUp to 5 h per charge with ANC on, 7 h with noise control off; up to 22 h with the charging case with ANC on

Sennheiser HD 660S2Not verified

Sources

Apple AirPods 5 with Wireless Charging Case

Manufacturer specification · Apple manufacturer testing in July–August 2026 with pre-production AirPods 5 and iPhone 18 Pro, pre-release software, 256 Kb/s AAC playlist and 50% volume; Spatial Audio and Conversation Awareness off. Case totals use repeated recharging. Actual runtime varies by settings, use and environment.

Apple UK — AirPods 5 technical specifications, both case configurations

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 5 with Wireless Charging CaseNot verified

Sennheiser HD 660S2300 ohm

Sources

Apple AirPods 5 with Wireless Charging Case

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.

Published acoustic changes

Apple AirPods 5 with Wireless Charging CaseNot verified

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

Sources

Apple AirPods 5 with Wireless Charging Case

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.

Audio features

Apple AirPods 5 with Wireless Charging CaseAdaptive EQ; Voice Isolation; studio-quality audio recording; vent system for pressure equalisation

Sennheiser HD 660S2Not verified

Sources

Apple AirPods 5 with Wireless Charging Case

Manufacturer specification · Compatible Apple devices, current operating-system software and compatible applications or firmware are required where Apple specifies them.

Apple UK — AirPods 5 technical specifications, both case configurations

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.

Included and optional cables

Apple AirPods 5 with Wireless Charging CaseNot verified

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

Sources

Apple AirPods 5 with Wireless Charging Case

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 5 with Wireless Charging CaseNot verified

Sennheiser HD 660S21.8 m

Sources

Apple AirPods 5 with Wireless Charging Case

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.

Charging-case mass

Apple AirPods 5 with Wireless Charging Case34.7 g

Sennheiser HD 660S2Not verified

Sources

Apple AirPods 5 with Wireless Charging Case

Manufacturer specification · Charging case only; not a total set mass. Configuration and manufacturing variation apply.

Apple UK — AirPods 5 technical specifications, both case configurations

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.

Case charging

Apple AirPods 5 with Wireless Charging CaseUSB-C; Apple Watch charger; Qi-certified chargers

Sennheiser HD 660S2Not verified

Sources

Apple AirPods 5 with Wireless Charging Case

Manufacturer specification · Charging methods for this selected case only. An omitted charging standard is not an explicitly disproved capability.

Apple UK — AirPods 5 technical specifications, both case configurations

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.

Audio chip

Apple AirPods 5 with Wireless Charging CaseApple H2 headphone chip

Sennheiser HD 660S2Not verified

Sources

Apple AirPods 5 with Wireless Charging Case

Manufacturer specification

Apple UK — AirPods 5 technical specifications, both case configurations

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 5 with Wireless Charging CaseNot verified

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

Sources

Apple AirPods 5 with Wireless Charging Case

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 5 with Wireless Charging CaseNot verified

Sennheiser HD 660S2Approximately 6.0 N ±1.0 N

Sources

Apple AirPods 5 with Wireless Charging Case

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.

Controls

Apple AirPods 5 with Wireless Charging CaseForce sensor with volume swipe; press for playback, calls and camera remote; press and hold for listening modes

Sennheiser HD 660S2Not verified

Sources

Apple AirPods 5 with Wireless Charging Case

Manufacturer specification · Volume swipe is explicitly listed only for AirPods 5 with Wireless Charging Case. Camera remote and some controls require compatible devices, current software and firmware.

Apple UK — AirPods 5 technical specifications, both case configurations

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 5 with Wireless Charging CaseNot verified

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

Sources

Apple AirPods 5 with Wireless Charging Case

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 5 with Wireless Charging CaseNot verified

Sennheiser HD 660S2Velour ear pads; replaceable

Sources

Apple AirPods 5 with Wireless Charging Case

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.

Charging-case location feature

Apple AirPods 5 with Wireless Charging CaseCase speaker for Find My

Sennheiser HD 660S2Not verified

Sources

Apple AirPods 5 with Wireless Charging Case

Manufacturer specification · Apple specifies iOS 27 or later for Find My functionality.

Apple UK — AirPods 5 technical specifications, both case configurations

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.

Frequency equalisation

Apple AirPods 5 with Wireless Charging CaseNot verified

Sennheiser HD 660S2Diffuse-field equalised

Sources

Apple AirPods 5 with Wireless Charging Case

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 5 with Wireless Charging CaseNot verified

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

Sources

Apple AirPods 5 with Wireless Charging Case

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.

In the box

Apple AirPods 5 with Wireless Charging CaseAirPods 5; USB-C charging case with speaker; documentation

Sennheiser HD 660S2Not verified

Sources

Apple AirPods 5 with Wireless Charging Case

Manufacturer specification · This is Apple’s listed inventory for the selected configuration; no charging cable or mains adapter is added to it.

Apple UK — AirPods 5 technical specifications, both case configurations

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 5 with Wireless Charging CaseNot verified

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

Sources

Apple AirPods 5 with Wireless Charging Case

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.

Dust, sweat and water rating

Apple AirPods 5 with Wireless Charging CaseConflicting evidence

Sennheiser HD 660S2Not verified

Sources

Apple AirPods 5 with Wireless Charging Case

Apple’s UK specifications heading and product overview state IP57, but specifications footnote 9 states that the products including the charging case were tested to IP54 under IEC 60529. The rating is unresolved; no water-resistance requirement match is awarded. · Manufacturer specification · Resistance is not permanent and can decrease with wear. Do not charge when wet; intended for non-water sports and exercise.

Apple UK — AirPods 5 technical specifications, both case configurations Apple UK — AirPods 5 design and configuration overview

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.

Live Translation

Apple AirPods 5 with Wireless Charging CaseAvailable in beta with compatible Apple Intelligence-enabled devices

Sennheiser HD 660S2Not verified

Sources

Apple AirPods 5 with Wireless Charging Case

Manufacturer specification · Compatible Apple device, latest software and AirPods firmware with Apple Intelligence enabled; availability varies by region and language. No universal offline or language support is inferred.

Apple UK — AirPods 5 technical specifications, both case configurations

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.

Static magnetic field at the surface

Apple AirPods 5 with Wireless Charging CaseNot verified

Sennheiser HD 660S24.5 mT

Sources

Apple AirPods 5 with Wireless Charging Case

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 5 with Wireless Charging CaseNot verified

Sennheiser HD 660S2−10 °C to +55 °C

Sources

Apple AirPods 5 with Wireless Charging Case

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.

System requirements

Apple AirPods 5 with Wireless Charging CaseLatest iOS, iPadOS, watchOS, macOS, tvOS or visionOS for the applicable Apple device; earlier Apple software and non-Apple Bluetooth devices may have limited functionality

Sennheiser HD 660S2Not verified

Sources

Apple AirPods 5 with Wireless Charging Case

Manufacturer specification

Apple UK — AirPods 5 technical specifications, both case configurations

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.

Short-charge claim

Apple AirPods 5 with Wireless Charging CaseAbout 1 h of listening after 5 min in the case

Sennheiser HD 660S2Not verified

Sources

Apple AirPods 5 with Wireless Charging Case

Manufacturer specification · Apple July–August 2026 pre-production testing with fully drained earbuds, 50% volume and Spatial Audio, Conversation Awareness and Noise Control off. Not an ANC-on runtime guarantee.

Apple UK — AirPods 5 technical specifications, both case configurations

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 sensitivity

Apple AirPods 5 with Wireless Charging CaseNot verified

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

Sources

Apple AirPods 5 with Wireless Charging Case

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.

Sensors

Apple AirPods 5 with Wireless Charging CaseOptical in-ear sensor; motion-detecting accelerometer; speech-detecting accelerometer; force sensor with volume swipe

Sennheiser HD 660S2Not verified

Sources

Apple AirPods 5 with Wireless Charging Case

Manufacturer specification

Apple UK — AirPods 5 technical specifications, both case configurations

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.

Replaceable parts

Apple AirPods 5 with Wireless Charging CaseNot verified

Sennheiser HD 660S2Detachable cable and replaceable ear pads

Sources

Apple AirPods 5 with Wireless Charging Case

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 5 with Wireless Charging CasePersonalised Spatial Audio with dynamic head tracking

Sennheiser HD 660S2Not verified

Sources

Apple AirPods 5 with Wireless Charging Case

Manufacturer specification · Compatible hardware, software and content required; a TrueDepth iPhone creates the personal profile. Not all content is in Dolby Atmos; Personalised Spatial Audio is unavailable on other devices.

Apple UK — AirPods 5 technical specifications, both case configurations

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 5 with Wireless Charging CaseNot verified

Sennheiser HD 660S2Double the sound pressure at the lowest frequencies

Sources

Apple AirPods 5 with Wireless Charging Case

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.

Weight of each earbud

Apple AirPods 5 with Wireless Charging Case4.3 g

Sennheiser HD 660S2Not verified

Sources

Apple AirPods 5 with Wireless Charging Case

Manufacturer specification · Per-earbud mass: Apple’s Size and Weight (Each) section. Not the combined weight of two earbuds or of the charging case; configuration and manufacturing variation apply.

Apple UK — AirPods 5 technical specifications, both case configurations

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.

Charging-case dimensions

Apple AirPods 5 with Wireless Charging Case46.2 × 50.1 × 21.2 mm (height × width × depth)

Sennheiser HD 660S2Not verified

Sources

Apple AirPods 5 with Wireless Charging Case

Manufacturer specification · Selected Wireless Charging Case; size varies by configuration and manufacturing process.

Apple UK — AirPods 5 technical specifications, both case configurations

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.

Dimensions of each earbud

Apple AirPods 5 with Wireless Charging Case30.2 × 18.3 × 18.1 mm (height × width × depth)

Sennheiser HD 660S2Not verified

Sources

Apple AirPods 5 with Wireless Charging Case

Manufacturer specification · Each earbud; size varies by configuration and manufacturing process.

Apple UK — AirPods 5 technical specifications, both case configurations

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 5 with Wireless Charging CaseNot verified

Sennheiser HD 660S2260 g

Sources

Apple AirPods 5 with Wireless Charging Case

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 5 with Wireless Charging Case

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 5 with Wireless Charging Case

What it brings

Active noise cancellation, Adaptive Audio and Transparency are listed alongside the open-ear fit.
Manufacturer source Manufacturer source
The selected case supports USB-C, Apple Watch and Qi charging, and includes a Find My speaker; volume swipe is explicitly included.
Manufacturer source

What to check

The maximum listening figures depend on noise-control settings and Apple’s test conditions; case-inclusive totals are not continuous listening on one earbud charge.
Manufacturer source
Many features need compatible Apple hardware and current software. The published IP57 headline and IP54 test footnote disagree, so the exact ingress rating remains unresolved.
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

40 of 40 specifications Sources in each row

Source-backed specifications for Apple AirPods 5 with Wireless Charging Case and Sennheiser HD 660S2
Specification	Apple AirPods 5 with Wireless Charging Case	Sennheiser HD 660S2

Wearing styleDifferent Sources Apple AirPods 5 with Wireless Charging Case Manufacturer specification · Apple describes an open-ear design; no silicone ear-tip fit is inferred. Apple UK — AirPods 5 design and configuration overview Sennheiser HD 660S2 Manufacturer specification Sennheiser HD 660S2 — operating guide and specifications	Open-ear wireless earbuds	Over-ear (circumaural), open-back dynamic headphones
Weight of each earbud Sources Apple AirPods 5 with Wireless Charging Case Manufacturer specification · Per-earbud mass: Apple’s Size and Weight (Each) section. Not the combined weight of two earbuds or of the charging case; configuration and manufacturing variation apply. Apple UK — AirPods 5 technical specifications, both case configurations Sennheiser HD 660S2 No source recorded.	4.3 g	Not provided
Dimensions of each earbud Sources Apple AirPods 5 with Wireless Charging Case Manufacturer specification · Each earbud; size varies by configuration and manufacturing process. Apple UK — AirPods 5 technical specifications, both case configurations Sennheiser HD 660S2 No source recorded.	30.2 × 18.3 × 18.1 mm (height × width × depth)	Not provided
Charging-case dimensions Sources Apple AirPods 5 with Wireless Charging Case Manufacturer specification · Selected Wireless Charging Case; size varies by configuration and manufacturing process. Apple UK — AirPods 5 technical specifications, both case configurations Sennheiser HD 660S2 No source recorded.	46.2 × 50.1 × 21.2 mm (height × width × depth)	Not provided
Charging-case mass Sources Apple AirPods 5 with Wireless Charging Case Manufacturer specification · Charging case only; not a total set mass. Configuration and manufacturing variation apply. Apple UK — AirPods 5 technical specifications, both case configurations Sennheiser HD 660S2 No source recorded.	34.7 g	Not provided
Weight Sources Apple AirPods 5 with Wireless Charging Case 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 5 with Wireless Charging Case No source recorded. Sennheiser HD 660S2 Manufacturer specification Sennheiser HD 660S2 — operating guide and specifications	Not provided	Open-back
Replaceable parts Sources Apple AirPods 5 with Wireless Charging Case 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 5 with Wireless Charging Case 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 5 with Wireless Charging Case 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

Audio connectionDifferent Sources Apple AirPods 5 with Wireless Charging Case Manufacturer specification · USB-C is listed for case charging; no wired USB audio capability is asserted. Apple UK — AirPods 5 technical specifications, both case configurations Sennheiser HD 660S2 Manufacturer specification Sennheiser HD 660S2 — exact model specifications Sennheiser HD 660S2 — operating guide and specifications	Bluetooth 5.3	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 and conditions Sources Apple AirPods 5 with Wireless Charging Case Manufacturer specification · Apple manufacturer testing in July–August 2026 with pre-production AirPods 5 and iPhone 18 Pro, pre-release software, 256 Kb/s AAC playlist and 50% volume; Spatial Audio and Conversation Awareness off. Case totals use repeated recharging. Actual runtime varies by settings, use and environment. Apple UK — AirPods 5 technical specifications, both case configurations 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	Up to 5 h per charge with ANC on, 7 h with noise control off; up to 22 h with the charging case with ANC on	Not listed by the manufacturer
Case charging Sources Apple AirPods 5 with Wireless Charging Case Manufacturer specification · Charging methods for this selected case only. An omitted charging standard is not an explicitly disproved capability. Apple UK — AirPods 5 technical specifications, both case configurations Sennheiser HD 660S2 No source recorded.	USB-C; Apple Watch charger; Qi-certified chargers	Not provided
Short-charge claim Sources Apple AirPods 5 with Wireless Charging Case Manufacturer specification · Apple July–August 2026 pre-production testing with fully drained earbuds, 50% volume and Spatial Audio, Conversation Awareness and Noise Control off. Not an ANC-on runtime guarantee. Apple UK — AirPods 5 technical specifications, both case configurations Sennheiser HD 660S2 No source recorded.	About 1 h of listening after 5 min in the case	Not provided
System requirements Sources Apple AirPods 5 with Wireless Charging Case Manufacturer specification Apple UK — AirPods 5 technical specifications, both case configurations Sennheiser HD 660S2 No source recorded.	Latest iOS, iPadOS, watchOS, macOS, tvOS or visionOS for the applicable Apple device; earlier Apple software and non-Apple Bluetooth devices may have limited functionality	Not provided
Included cable length Sources Apple AirPods 5 with Wireless Charging Case 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 5 with Wireless Charging Case 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 5 with Wireless Charging Case 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

Audio chip Sources Apple AirPods 5 with Wireless Charging Case Manufacturer specification Apple UK — AirPods 5 technical specifications, both case configurations Sennheiser HD 660S2 No source recorded.	Apple H2 headphone chip	Not provided
Driver and amplifierDifferent Sources Apple AirPods 5 with Wireless Charging Case Manufacturer specification · No driver diameter is stated on the technical specifications page. Apple UK — AirPods 5 technical specifications, both case configurations Sennheiser HD 660S2 Manufacturer specification · Sennheiser lists 38 mm as the transducer size. Sennheiser HD 660S2 — exact model specifications	Custom high-excursion Apple driver; custom high dynamic range amplifier	38 mm open dynamic transducer; aluminium voice coil and vented magnet system
Spatial audio Sources Apple AirPods 5 with Wireless Charging Case Manufacturer specification · Compatible hardware, software and content required; a TrueDepth iPhone creates the personal profile. Not all content is in Dolby Atmos; Personalised Spatial Audio is unavailable on other devices. Apple UK — AirPods 5 technical specifications, both case configurations Sennheiser HD 660S2 No source recorded.	Personalised Spatial Audio with dynamic head tracking	Not provided
Audio features Sources Apple AirPods 5 with Wireless Charging Case Manufacturer specification · Compatible Apple devices, current operating-system software and compatible applications or firmware are required where Apple specifies them. Apple UK — AirPods 5 technical specifications, both case configurations Sennheiser HD 660S2 No source recorded.	Adaptive EQ; Voice Isolation; studio-quality audio recording; vent system for pressure equalisation	Not provided
Nominal impedance Sources Apple AirPods 5 with Wireless Charging Case 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 5 with Wireless Charging Case 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 5 with Wireless Charging Case 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
Frequency equalisation Sources Apple AirPods 5 with Wireless Charging Case 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 5 with Wireless Charging Case 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 5 with Wireless Charging Case 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 5 with Wireless Charging Case 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 5 with Wireless Charging Case 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 5 with Wireless Charging Case Manufacturer specification · Dual beam-forming microphones and inward-facing microphone. Apple UK — AirPods 5 technical specifications, both case configurations 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 5 with Wireless Charging Case Manufacturer specification · Also supports Adaptive Audio, Transparency and Conversation Awareness; requires compatible software for the listed features. Apple UK — AirPods 5 technical specifications, both case configurations 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

Controls Sources Apple AirPods 5 with Wireless Charging Case Manufacturer specification · Volume swipe is explicitly listed only for AirPods 5 with Wireless Charging Case. Camera remote and some controls require compatible devices, current software and firmware. Apple UK — AirPods 5 technical specifications, both case configurations Sennheiser HD 660S2 No source recorded.	Force sensor with volume swipe; press for playback, calls and camera remote; press and hold for listening modes	Not provided
Sensors Sources Apple AirPods 5 with Wireless Charging Case Manufacturer specification Apple UK — AirPods 5 technical specifications, both case configurations Sennheiser HD 660S2 No source recorded.	Optical in-ear sensor; motion-detecting accelerometer; speech-detecting accelerometer; force sensor with volume swipe	Not provided
Charging-case location feature Sources Apple AirPods 5 with Wireless Charging Case Manufacturer specification · Apple specifies iOS 27 or later for Find My functionality. Apple UK — AirPods 5 technical specifications, both case configurations Sennheiser HD 660S2 No source recorded.	Case speaker for Find My	Not provided
Live Translation Sources Apple AirPods 5 with Wireless Charging Case Manufacturer specification · Compatible Apple device, latest software and AirPods firmware with Apple Intelligence enabled; availability varies by region and language. No universal offline or language support is inferred. Apple UK — AirPods 5 technical specifications, both case configurations Sennheiser HD 660S2 No source recorded.	Available in beta with compatible Apple Intelligence-enabled devices	Not provided

In the box Sources Apple AirPods 5 with Wireless Charging Case Manufacturer specification · This is Apple’s listed inventory for the selected configuration; no charging cable or mains adapter is added to it. Apple UK — AirPods 5 technical specifications, both case configurations Sennheiser HD 660S2 No source recorded.	AirPods 5; USB-C charging case with speaker; documentation	Not provided

Static magnetic field at the surface Sources Apple AirPods 5 with Wireless Charging Case 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 5 with Wireless Charging Case No source recorded. Sennheiser HD 660S2 Manufacturer specification Sennheiser HD 660S2 — operating guide and specifications	Not provided	−10 °C to +55 °C

Show unverified (1)Not verified, not provided or conflicting for both products. Kept for completeness; never counted as a difference.

Specifications without verified values for either product
Dust, sweat and water rating Sources Apple AirPods 5 with Wireless Charging Case Apple’s UK specifications heading and product overview state IP57, but specifications footnote 9 states that the products including the charging case were tested to IP54 under IEC 60529. The rating is unresolved; no water-resistance requirement match is awarded. · Manufacturer specification · Resistance is not permanent and can decrease with wear. Do not charge when wet; intended for non-water sports and exercise. Apple UK — AirPods 5 technical specifications, both case configurations Apple UK — AirPods 5 design and configuration overview Sennheiser HD 660S2 No source recorded.	Conflicting sources	Not provided

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.