Black · WF1000XM6B.CE7 · UK catalogue
Sony’s Black WF-1000XM6 is an active noise-cancelling earbud set with Bluetooth; positively listed SBC, AAC, LDAC and LC3 audio modes. The published endurance is retained with its specific connection and codec conditions.
Specifications checked 17 Oct 2026.
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Manufacturer specificationsChoose the Sony WF-1000XM6 for
Choose the Sennheiser HD 660S2 for
700240 · black with bronze accents · 300 ohm · 1.8 m balanced and unbalanced cables
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.
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Differences first. Select a topic for its graphic, sources and conditions.
Yes and No describe the listed feature. Missing evidence stays unverified.
Open-back earcups are not sealed. Start here if your listening space is quiet; this construction is not a sound-quality rating.
Open-back. Manufacturer specification
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.
2 verified differences, most decision-relevant first. Missing information stays separate.
Manufacturer specification · Only positively documented audio modes are listed. A charging connector does not by itself establish USB audio; unlisted codecs or other wireless modes remain unverified.
Sony WF-1000XM6 official English Help GuideManufacturer specification
Sennheiser HD 660S2 — exact model specificationsSennheiser HD 660S2 — operating guide and specificationsCheck the exact configuration and source conditions for your use.
Manufacturer specification · Exact model wearing instructions and manufacturer model imagery; earbud/headband scope is not interchanged.
Sony WF-1000XM6 official English Help GuideManufacturer specification
Sennheiser HD 660S2 — operating guide and specificationsCheck the exact configuration and source conditions for your use.
No source recorded for this side.
Manufacturer specification
Sennheiser HD 660S2 — operating guide and specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
Manufacturer specification · The exact model guide names a noise-cancelling headset and documents its noise-cancelling mode. This is presence, not measured attenuation or comparative sound quality.
Sony WF-1000XM6 official English Help GuideThe 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 specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
Manufacturer specification · The exact manual documents voice pickup and call or chat controls. No microphone count or measured pickup quality is inferred.
Sony WF-1000XM6 official English Help GuideThe 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 specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
Manufacturer specification · Manufacturer full-charge earbud maxima; Equalizer, DSEE Extreme, Speak-to-Chat, Service Link and Auto Ambient Sound shorten runtime. These are not charging-case-inclusive totals or independent measurements.
Sony WF-1000XM6 official English Help GuideThe 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 specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
Manufacturer specification · Nominal impedance; check that your amplifier or audio source can drive this load.
Sennheiser HD 660S2 — operating guide and specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
Manufacturer specification · Sennheiser lists 38 mm as the transducer size.
Sennheiser HD 660S2 — exact model specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
Manufacturer specification · Sennheiser describes these changes as the S2 revision of the HD 660S.
Sennheiser HD 660S2 — exact model specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
Manufacturer specification · Current manufacturer product page app name; functions depend on a compatible device, connection and settings.
Sony WF-1000XM6 exact UK colour and configurationNo source recorded for this side.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
The retained exact-model specification does not establish capacity in mAh. Operating voltage is not a charge capacity. · Manufacturer specification
Sony WF-1000XM6 official English Help GuideNo source recorded for this side.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
Manufacturer specification · The exact source names built-in lithium-ion batteries; capacity and user replaceability are not inferred.
Sony WF-1000XM6 official English Help GuideNo source recorded for this side.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
The retained exact specifications state Bluetooth without a numbered version; no version is inferred from another model or supported codecs. · Manufacturer specification · The stated version does not establish every optional Bluetooth feature or universal device compatibility.
Sony WF-1000XM6 official English Help GuideNo source recorded for this side.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
Manufacturer specification · Optional cables are sold separately; balanced cables need a balanced headphone output.
Sennheiser HD 660S2 — exact model specificationsSennheiser HD 660S2 — operating guide and specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
Manufacturer specification · Length of the supplied cable.
Sennheiser HD 660S2 — operating guide and specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
Manufacturer specification · Approximately; charging case only, not an earbud-charge duration.
Sony WF-1000XM6 official English Help GuideNo source recorded for this side.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
Manufacturer specification · Approximately; charging case only. This is separate from the per-earbud weight.
Sony WF-1000XM6 official English Help GuideNo source recorded for this side.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
Manufacturer specification · Approximately; earbuds only. Charging-case time is listed separately. Actual charging time varies with conditions of use.
Sony WF-1000XM6 official English Help GuideNo source recorded for this side.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
Manufacturer specification · Positively named supported codecs. Unlisted formats are not marked unsupported.
Sony WF-1000XM6 official English Help GuideNo source recorded for this side.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
Manufacturer specification · The 4.4 mm balanced cable needs a balanced headphone output; an XLR-4 cable is optional.
Sennheiser HD 660S2 — exact model specificationsSennheiser HD 660S2 — operating guide and specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
Manufacturer specification · Nominal clamping force; individual fit and comfort can differ.
Sennheiser HD 660S2 — operating guide and specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
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 specificationsSennheiser HD 660S2 — operating guide and specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
Manufacturer specification · Replacement procedure shown in the manual.
Sennheiser HD 660S2 — exact model specificationsSennheiser HD 660S2 — operating guide and specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
Manufacturer specification
Sennheiser HD 660S2 — operating guide and specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
Manufacturer specification
Sennheiser HD 660S2 — operating guide and specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
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 specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
Manufacturer specification · Static magnetic field at the headphone surface.
Sennheiser HD 660S2 — exact model specificationsSennheiser HD 660S2 — operating guide and specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
Manufacturer specification
Sennheiser HD 660S2 — operating guide and specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
Manufacturer specification · Rated at 1 kHz with 1 V rms; not directly comparable with dB/mW ratings.
Sennheiser HD 660S2 — operating guide and specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
Manufacturer specification · Replacement procedures are in the manual; spare-part availability varies.
Sennheiser HD 660S2 — operating guide and specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
Manufacturer specification · Sennheiser does not give the frequency range or comparison model for this claim.
Sennheiser HD 660S2 — exact model specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
Manufacturer specification · The exact guide gives splash resistance for the earbuds; the charging case is not water resistant and the headset must not be immersed.
Sony WF-1000XM6 official English Help GuideNo source recorded for this side.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
Manufacturer specification · Approximately per earbud, including medium ear tips; charging case and USB transceiver are separate.
Sony WF-1000XM6 official English Help GuideNo source recorded for this side.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
Manufacturer specification · The exact specification positively lists wireless charging with the case; no numeric charging power is inferred.
Sony WF-1000XM6 official English Help GuideNo source recorded for this side.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
Manufacturer specification · Approximate, without the cable.
Sennheiser HD 660S2 — operating guide and specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
0 shared fields have the same recorded value.
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| Specification | Sony WF-1000XM6 | Sennheiser HD 660S2 |
|---|---|---|
Wearing styleDifferent SourcesSony WF-1000XM6 Manufacturer specification · Exact model wearing instructions and manufacturer model imagery; earbud/headband scope is not interchanged. Sony WF-1000XM6 official English Help GuideSennheiser HD 660S2 Manufacturer specification Sennheiser HD 660S2 — operating guide and specifications | In-ear true wireless earbuds | Over-ear (circumaural), open-back dynamic headphones |
Weight per earbud SourcesSony WF-1000XM6 Manufacturer specification · Approximately per earbud, including medium ear tips; charging case and USB transceiver are separate. Sony WF-1000XM6 official English Help GuideSennheiser HD 660S2 No source recorded. | 6.5 g | Not provided |
Charging case weight SourcesSony WF-1000XM6 Manufacturer specification · Approximately; charging case only. This is separate from the per-earbud weight. Sony WF-1000XM6 official English Help GuideSennheiser HD 660S2 No source recorded. | 47 g | Not provided |
Water resistance SourcesSony WF-1000XM6 Manufacturer specification · The exact guide gives splash resistance for the earbuds; the charging case is not water resistant and the headset must not be immersed. Sony WF-1000XM6 official English Help GuideSennheiser HD 660S2 No source recorded. | IPX4 (earbuds) | Not provided |
Weight SourcesSony WF-1000XM6 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 SourcesSony WF-1000XM6 No source recorded. Sennheiser HD 660S2 Manufacturer specification Sennheiser HD 660S2 — operating guide and specifications | Not provided | Open-back |
Replaceable parts SourcesSony WF-1000XM6 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 SourcesSony WF-1000XM6 No source recorded. Sennheiser HD 660S2 Manufacturer specification · Replacement procedure shown in the manual. Sennheiser HD 660S2 — exact model specificationsSennheiser HD 660S2 — operating guide and specifications | Not provided | Velour ear pads; replaceable |
Rated contact pressure SourcesSony WF-1000XM6 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 SourcesSony WF-1000XM6 Manufacturer specification · Only positively documented audio modes are listed. A charging connector does not by itself establish USB audio; unlisted codecs or other wireless modes remain unverified. Sony WF-1000XM6 official English Help GuideSennheiser HD 660S2 Manufacturer specification Sennheiser HD 660S2 — exact model specificationsSennheiser HD 660S2 — operating guide and specifications | Bluetooth; positively listed SBC, AAC, LDAC and LC3 audio modes | 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 SourcesSony WF-1000XM6 Manufacturer specification · Manufacturer full-charge earbud maxima; Equalizer, DSEE Extreme, Speak-to-Chat, Service Link and Auto Ambient Sound shorten runtime. These are not charging-case-inclusive totals or independent measurements. Sony WF-1000XM6 official English Help GuideSennheiser 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 | AAC or SBC: up to 8 hours music playback with noise cancelling or Ambient Sound active, or 12 hours with both inactive; LDAC: up to 5 hours active or 8 hours inactive; LC3: up to 7 hours active or 11 hours inactive. | Not listed by the manufacturer |
Battery chemistry SourcesSony WF-1000XM6 Manufacturer specification · The exact source names built-in lithium-ion batteries; capacity and user replaceability are not inferred. Sony WF-1000XM6 official English Help GuideSennheiser HD 660S2 No source recorded. | Lithium-ion | Not provided |
Full charge time SourcesSony WF-1000XM6 Manufacturer specification · Approximately; earbuds only. Charging-case time is listed separately. Actual charging time varies with conditions of use. Sony WF-1000XM6 official English Help GuideSennheiser HD 660S2 No source recorded. | 1.5 hours | Not provided |
Charging case full charge time SourcesSony WF-1000XM6 Manufacturer specification · Approximately; charging case only, not an earbud-charge duration. Sony WF-1000XM6 official English Help GuideSennheiser HD 660S2 No source recorded. | 2 hours | Not provided |
Wireless charging SourcesSony WF-1000XM6 Manufacturer specification · The exact specification positively lists wireless charging with the case; no numeric charging power is inferred. Sony WF-1000XM6 official English Help GuideSennheiser HD 660S2 No source recorded. | Yes | Not provided |
Bluetooth codecs SourcesSony WF-1000XM6 Manufacturer specification · Positively named supported codecs. Unlisted formats are not marked unsupported. Sony WF-1000XM6 official English Help GuideSennheiser HD 660S2 No source recorded. | SBC, AAC, LDAC, LC3 | Not provided |
Included cable length SourcesSony WF-1000XM6 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 SourcesSony WF-1000XM6 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 specificationsSennheiser 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 SourcesSony WF-1000XM6 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 specificationsSennheiser HD 660S2 — operating guide and specifications | Not provided | Detachable 1.8 m unbalanced and 4.4 mm balanced cables included; XLR-4 cable optional |
Nominal impedance SourcesSony WF-1000XM6 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 SourcesSony WF-1000XM6 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 SourcesSony WF-1000XM6 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 SourcesSony WF-1000XM6 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 SourcesSony WF-1000XM6 No source recorded. Sennheiser HD 660S2 Manufacturer specification Sennheiser HD 660S2 — operating guide and specifications | Not provided | Diffuse-field equalised |
Rated total harmonic distortion SourcesSony WF-1000XM6 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 specificationsSennheiser HD 660S2 — operating guide and specifications | Not provided | ≤0.04% at 1 kHz, 100 dB SPL |
Rated long-term input power SourcesSony WF-1000XM6 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 SourcesSony WF-1000XM6 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 SourcesSony WF-1000XM6 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 SourcesSony WF-1000XM6 Manufacturer specification · The exact manual documents voice pickup and call or chat controls. No microphone count or measured pickup quality is inferred. Sony WF-1000XM6 official English Help GuideSennheiser 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 SourcesSony WF-1000XM6 Manufacturer specification · The exact model guide names a noise-cancelling headset and documents its noise-cancelling mode. This is presence, not measured attenuation or comparative sound quality. Sony WF-1000XM6 official English Help GuideSennheiser 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 |
Companion app SourcesSony WF-1000XM6 Manufacturer specification · Current manufacturer product page app name; functions depend on a compatible device, connection and settings. Sony WF-1000XM6 exact UK colour and configurationSennheiser HD 660S2 No source recorded. | Sony | Sound Connect | Not provided |
Static magnetic field at the surface SourcesSony WF-1000XM6 No source recorded. Sennheiser HD 660S2 Manufacturer specification · Static magnetic field at the headphone surface. Sennheiser HD 660S2 — exact model specificationsSennheiser HD 660S2 — operating guide and specifications | Not provided | 4.5 mT |
Operating temperature SourcesSony WF-1000XM6 No source recorded. Sennheiser HD 660S2 Manufacturer specification Sennheiser HD 660S2 — operating guide and specifications | Not provided | −10 °C to +55 °C |
Battery capacity SourcesSony WF-1000XM6 The retained exact-model specification does not establish capacity in mAh. Operating voltage is not a charge capacity. · Manufacturer specification Sony WF-1000XM6 official English Help GuideSennheiser HD 660S2 No source recorded. | Not listed by the manufacturer | Not provided |
|---|---|---|
Bluetooth version SourcesSony WF-1000XM6 The retained exact specifications state Bluetooth without a numbered version; no version is inferred from another model or supported codecs. · Manufacturer specification · The stated version does not establish every optional Bluetooth feature or universal device compatibility. Sony WF-1000XM6 official English Help GuideSennheiser HD 660S2 No source recorded. | Not listed by the manufacturer | Not provided |
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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.
