6974434225138 · Orange · UK
CMF Buds 2a (store SKU 6974434225138 in Orange on the UK and US Nothing stores) are true wireless earbuds with ANC up to 42 dB, a 12.4 mm bio-fibre driver, four microphones and Bluetooth 5.4 with dual connection.
Specifications checked 26 Sept 2026.
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Manufacturer specificationsChoose the Nothing CMF Buds 2a for
Choose the Sennheiser HD 600 for
508824 · grey finish · 300 ohm · standard 3 m stereo cable
The HD 600 is an open-back, over-ear dynamic headphone. Sennheiser describes a 42 mm driver with a 38 mm diaphragm and aluminium voice coils, rated 12–40,500 Hz (−10 dB) at 300 ohms. It has a detachable 3 m cable and replaceable velour ear pads.
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.
3 verified differences, most decision-relevant first. Missing information stays separate.
Manufacturer specification · The manufacturer lists AAC and SBC codec support; support for other codecs remains unverified. Charging is quoted with a Type-C cable.
Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsManufacturer specification · Sennheiser's manual and UK page disagree on which plug is native; see Supplied plug configuration.
Sennheiser HD 600 — exact model specificationsSennheiser HD 600 — operating guide and specificationsCheck the exact configuration and source conditions for your use.
Manufacturer specification
Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsManufacturer specification · Sennheiser gives 42 mm for the driver and 38 mm for its diaphragm; it does not say how the 42 mm figure is measured.
Sennheiser HD 600 — exact model specificationsCheck whether the diameter describes the complete transducer or only its diaphragm. Different labels and driver sizes do not establish better sound.
Manufacturer specification · A pair of earbuds and a charging case (with a lanyard hole); ear tips in sizes S, M and L are in the box. Nothing does not state the ear tip material.
Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsCheck the exact configuration and source conditions for your use.
No source recorded for this side.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
Manufacturer specification · ANC up to 42 dB (Nothing's laboratory theoretical maximum) over up to 2900 Hz, with Adaptive ANC and Transparency mode.
Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsThe 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 600 — operating guide and specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
Manufacturer specification · Four HD microphones in total (two per bud) with Clear Voice Technology and Wind Noise Reduction 2.0.
Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsThe 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 600 — operating guide and specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
Manufacturer specification · Nothing laboratory results at 25 °C, 50% volume, AAC, other features at default settings; actual life varies with use. Talk time is listed separately (earbuds 3.5 h ANC on / 4 h ANC off; with case 15.6 h / 18.4 h).
Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsNothing (US store, us.nothing.tech) — CMF Buds 2a product page with technical specificationsThe 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 600 — 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 600 — 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.
Sennheiser does not describe an acoustic revision for the HD 600. · Manufacturer specification
Sennheiser HD 600 — exact model specificationsSennheiser HD 600 — operating guide and specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
Manufacturer specification · Nothing says all these features are available on Nothing OS and in the Nothing X app for iOS and other Android devices (Android 6.0 and above, iOS 13 and above); on Nothing OS 1.5.6 and higher the settings are built into the phone.
Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsNothing (US store, us.nothing.tech) — CMF Buds 2a product page with technical specificationsNo source recorded for this side.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
Manufacturer specification
Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsNo 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 600 — exact model specificationsSennheiser HD 600 — 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 600 — operating guide and specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
Manufacturer specification · Fast charge: after a 10-minute charge, up to 5.5 hours of playback with the case or 2 hours without it (ANC off, 50% volume, AAC, Nothing laboratory, 25 °C).
Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsNothing (US store, us.nothing.tech) — CMF Buds 2a product page with technical specificationsNo source recorded for this side.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
Manufacturer specification
Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsNo 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.
Sennheiser's manual and UK specification table list a 3.5 mm plug with a 6.35 mm adapter, while the UK page's connection text describes a 6.3 mm plug with a 3.5 mm adapter. Check the listing for the supplied plug. · Manufacturer specification · Needs a matching headphone output; the 4.4 mm balanced cable needs a balanced output.
Sennheiser HD 600 — exact model specificationsSennheiser HD 600 — 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 600 — operating guide and specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
Manufacturer specification · Customisable (footnote 7): double tap, triple tap, tap & hold and double tap & hold can be set to next song, previous song, volume up, volume down, voice assistant or switching noise cancellation modes, via phone settings on Nothing OS 1.5.6+ or the Nothing X app on Android 6.0+/iOS 13+.
Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsNothing (US store, us.nothing.tech) — CMF Buds 2a product page with technical specificationsNo 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 · Rated to DIN 45500; other models use different test levels, so compare with care.
Sennheiser HD 600 — exact model specificationsSennheiser HD 600 — 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 600 — exact model specificationsSennheiser HD 600 — operating guide and specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
Manufacturer specification · Fast Pair works on supported Android devices running Google Play services 11.7+ (back to Android 6.0); Find My and device renaming support need Android 10 or later.
Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsNothing (US store, us.nothing.tech) — CMF Buds 2a product page with technical specificationsNo 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.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
No 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 · Rated to DIN 45580; the maximum input the headphones can handle, not the amplifier power they need.
Sennheiser HD 600 — operating guide and specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
Manufacturer specification · The Other features table says 'less than 110 ms under Game Mode' with a Nothing Phone; footnote 5 says latency can be reduced to as low as 110 ms with Nothing phones and Game Mode on. Source field: Low lag mode.
Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsNothing (US store, us.nothing.tech) — CMF Buds 2a product page with technical specificationsNo 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 · Static magnetic field at the headphone surface.
Sennheiser HD 600 — exact model specificationsSennheiser HD 600 — operating guide and specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
Manufacturer specification
Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsNothing (US store, us.nothing.tech) — CMF Buds 2a product page with technical specificationsNo 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.
Evidence 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 600 — 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 600 — operating guide and specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
Manufacturer specification · The Sound features table says 'Ultra Bass Technology'; the product copy calls it 'Ultra Bass Technology 2.0'.
Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsNothing (US store, us.nothing.tech) — CMF Buds 2a product page with technical specificationsNo 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.
Sennheiser makes no sub-bass claim for the HD 600. · Manufacturer specification
Sennheiser HD 600 — exact model specificationsSennheiser HD 600 — operating guide and specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
The specification lists 'IPX2 case', but footnote 4 says the IP54 test applies to the earbuds and 'the charging case is not supported'; the case rating is therefore left out. · Manufacturer specification
Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsNo source recorded for this side.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
Manufacturer specification · Each earbud. The charging case weighs 42.75 g.
Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsNo source recorded for this side.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
Manufacturer specification
Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsNothing (US store, us.nothing.tech) — CMF Buds 2a product page with technical specificationsNo 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 600 — 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 | Nothing CMF Buds 2a | Sennheiser HD 600 |
|---|---|---|
Wearing styleDifferent SourcesNothing CMF Buds 2a Manufacturer specification · A pair of earbuds and a charging case (with a lanyard hole); ear tips in sizes S, M and L are in the box. Nothing does not state the ear tip material. Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specifications | In-ear, true wireless (ear tips in sizes S, M and L) | Over-ear (circumaural), open-back dynamic headphones |
Weight per earbud SourcesNothing CMF Buds 2a Manufacturer specification · Each earbud. The charging case weighs 42.75 g. Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsSennheiser HD 600 No source recorded. | 4.28 g | Not provided |
Dimensions SourcesNothing CMF Buds 2a Manufacturer specification Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsNothing (US store, us.nothing.tech) — CMF Buds 2a product page with technical specificationsSennheiser HD 600 No source recorded. | Each earbud 32.5 x 20.3 x 24.3 mm; charging case 54.7 x 54.7 x 23 mm (height x width x depth) | Not provided |
Dust, sweat and water resistance SourcesNothing CMF Buds 2a The specification lists 'IPX2 case', but footnote 4 says the IP54 test applies to the earbuds and 'the charging case is not supported'; the case rating is therefore left out. · Manufacturer specification Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsSennheiser HD 600 No source recorded. | IP54 (earbuds) | Not provided |
Weight SourcesNothing CMF Buds 2a No source recorded. Sennheiser HD 600 Manufacturer specification · Approximate, without the cable. Sennheiser HD 600 — operating guide and specifications | Not provided | 260 g |
Acoustic design SourcesNothing CMF Buds 2a No source recorded. | Not provided | Open-back |
Replaceable parts SourcesNothing CMF Buds 2a No source recorded. Sennheiser HD 600 Manufacturer specification · Replacement procedures are in the manual; spare-part availability varies. Sennheiser HD 600 — operating guide and specifications | Not provided | Detachable cable and replaceable ear pads |
Ear pads SourcesNothing CMF Buds 2a No source recorded. Sennheiser HD 600 Manufacturer specification · Replacement procedure shown in the manual. Sennheiser HD 600 — exact model specificationsSennheiser HD 600 — operating guide and specifications | Not provided | Velour ear pads; replaceable |
Rated contact pressure SourcesNothing CMF Buds 2a No source recorded. Sennheiser HD 600 Manufacturer specification · Nominal clamping force; individual fit and comfort can differ. Sennheiser HD 600 — operating guide and specifications | Not provided | Approximately 6.0 N ±1.0 N |
Wired / wireless connectionsDifferent SourcesNothing CMF Buds 2a Manufacturer specification · The manufacturer lists AAC and SBC codec support; support for other codecs remains unverified. Charging is quoted with a Type-C cable. Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsSennheiser HD 600 Manufacturer specification · Sennheiser's manual and UK page disagree on which plug is native; see Supplied plug configuration. Sennheiser HD 600 — exact model specificationsSennheiser HD 600 — operating guide and specifications | Bluetooth 5.4 (AAC, SBC) with dual connection; USB-C charging on the case | Wired analogue stereo; detachable 3 m cable and supplied adapter support 3.5 mm and 6.35 mm connections |
Battery life SourcesNothing CMF Buds 2a Manufacturer specification · Nothing laboratory results at 25 °C, 50% volume, AAC, other features at default settings; actual life varies with use. Talk time is listed separately (earbuds 3.5 h ANC on / 4 h ANC off; with case 15.6 h / 18.4 h). Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsNothing (US store, us.nothing.tech) — CMF Buds 2a product page with technical specificationsSennheiser HD 600 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 600 — operating guide and specifications | Earbuds up to 5 hours with ANC on and 8 hours with ANC off; with the charging case 23 hours with ANC on and 35.5 hours with ANC off. | Not listed by the manufacturer |
Charge time SourcesNothing CMF Buds 2a Manufacturer specification · Fast charge: after a 10-minute charge, up to 5.5 hours of playback with the case or 2 hours without it (ANC off, 50% volume, AAC, Nothing laboratory, 25 °C). Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsNothing (US store, us.nothing.tech) — CMF Buds 2a product page with technical specificationsSennheiser HD 600 No source recorded. | Full charge (0-100%) in 89 minutes with the case connected to a USB-C cable; with the case unplugged, the earbuds charge inside it in 57 minutes | Not provided |
Bluetooth codecs SourcesNothing CMF Buds 2a Manufacturer specification Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsSennheiser HD 600 No source recorded. | AAC, SBC | Not provided |
Multipoint (dual connection) SourcesNothing CMF Buds 2a Manufacturer specification Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsNothing (US store, us.nothing.tech) — CMF Buds 2a product page with technical specificationsSennheiser HD 600 No source recorded. | Yes | Not provided |
Low lag mode SourcesNothing CMF Buds 2a Manufacturer specification · The Other features table says 'less than 110 ms under Game Mode' with a Nothing Phone; footnote 5 says latency can be reduced to as low as 110 ms with Nothing phones and Game Mode on. Source field: Low lag mode. Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsNothing (US store, us.nothing.tech) — CMF Buds 2a product page with technical specificationsSennheiser HD 600 No source recorded. | 110 ms with a Nothing phone in Game Mode | Not provided |
Quick pairing SourcesNothing CMF Buds 2a Manufacturer specification · Fast Pair works on supported Android devices running Google Play services 11.7+ (back to Android 6.0); Find My and device renaming support need Android 10 or later. Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsNothing (US store, us.nothing.tech) — CMF Buds 2a product page with technical specificationsSennheiser HD 600 No source recorded. | Google Fast Pair and Microsoft Swift Pair | Not provided |
Battery capacity SourcesNothing CMF Buds 2a Manufacturer specification Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsSennheiser HD 600 No source recorded. | Earbuds 43 mAh each; case 460 mAh | Not provided |
Included cable length SourcesNothing CMF Buds 2a No source recorded. Sennheiser HD 600 Manufacturer specification · Length of the supplied cable. Sennheiser HD 600 — operating guide and specifications | Not provided | 3 m |
Included and optional cables SourcesNothing CMF Buds 2a No source recorded. Sennheiser HD 600 Manufacturer specification · Optional cables are sold separately; balanced cables need a balanced headphone output. Sennheiser HD 600 — exact model specificationsSennheiser HD 600 — operating guide and specifications | Not provided | Detachable 3 m unbalanced cable included; 4.4 mm and XLR-4 balanced cables optional |
DriversDifferent SourcesNothing CMF Buds 2a Manufacturer specification Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsSennheiser HD 600 Manufacturer specification · Sennheiser gives 42 mm for the driver and 38 mm for its diaphragm; it does not say how the 42 mm figure is measured. Sennheiser HD 600 — exact model specifications | Custom 12.4 mm dynamic driver, bio-fibre + custom TPU diaphragm, Dirac tuning | Open dynamic 42 mm driver with a 38 mm diaphragm and aluminium voice coils |
Sound features SourcesNothing CMF Buds 2a Manufacturer specification · The Sound features table says 'Ultra Bass Technology'; the product copy calls it 'Ultra Bass Technology 2.0'. Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsNothing (US store, us.nothing.tech) — CMF Buds 2a product page with technical specificationsSennheiser HD 600 No source recorded. | Dirac, Ultra Bass Technology, Custom EQ; tuning by Nothing and Dirac | Not provided |
Nominal impedance SourcesNothing CMF Buds 2a No source recorded. Sennheiser HD 600 Manufacturer specification · Nominal impedance; check that your amplifier or audio source can drive this load. Sennheiser HD 600 — operating guide and specifications | Not provided | 300 ohm |
Rated frequency range SourcesNothing CMF Buds 2a No source recorded. | Not provided | 12–40,500 Hz (−10 dB) |
Rated sensitivity SourcesNothing CMF Buds 2a No source recorded. Sennheiser HD 600 Manufacturer specification · Rated at 1 kHz with 1 V rms; not directly comparable with dB/mW ratings. Sennheiser HD 600 — operating guide and specifications | Not provided | 97 dB SPL at 1 kHz, 1 V rms |
Frequency equalisation SourcesNothing CMF Buds 2a No source recorded. | Not provided | Diffuse-field equalised |
Rated total harmonic distortion SourcesNothing CMF Buds 2a No source recorded. Sennheiser HD 600 Manufacturer specification · Rated to DIN 45500; other models use different test levels, so compare with care. Sennheiser HD 600 — exact model specificationsSennheiser HD 600 — operating guide and specifications | Not provided | ≤0.1% at 1 kHz, 1 V rms (DIN 45500) |
Rated long-term input power SourcesNothing CMF Buds 2a No source recorded. Sennheiser HD 600 Manufacturer specification · Rated to DIN 45580; the maximum input the headphones can handle, not the amplifier power they need. Sennheiser HD 600 — operating guide and specifications | Not provided | 0.2 W under DIN 45580 |
Microphone SourcesNothing CMF Buds 2a Manufacturer specification · Four HD microphones in total (two per bud) with Clear Voice Technology and Wind Noise Reduction 2.0. Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsSennheiser HD 600 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 600 — operating guide and specifications | Yes | Not listed by the manufacturer |
Active noise cancellation SourcesNothing CMF Buds 2a Manufacturer specification · ANC up to 42 dB (Nothing's laboratory theoretical maximum) over up to 2900 Hz, with Adaptive ANC and Transparency mode. Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsSennheiser HD 600 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 600 — operating guide and specifications | Yes | Not listed by the manufacturer |
Companion app SourcesNothing CMF Buds 2a Manufacturer specification · Nothing says all these features are available on Nothing OS and in the Nothing X app for iOS and other Android devices (Android 6.0 and above, iOS 13 and above); on Nothing OS 1.5.6 and higher the settings are built into the phone. Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsNothing (US store, us.nothing.tech) — CMF Buds 2a product page with technical specificationsSennheiser HD 600 No source recorded. | Nothing X app (Android and iOS): customise equaliser and controls, find my earbuds, low lag mode, software updates | Not provided |
Controls SourcesNothing CMF Buds 2a Manufacturer specification · Customisable (footnote 7): double tap, triple tap, tap & hold and double tap & hold can be set to next song, previous song, volume up, volume down, voice assistant or switching noise cancellation modes, via phone settings on Nothing OS 1.5.6+ or the Nothing X app on Android 6.0+/iOS 13+. Nothing (UK store, nothing.tech) — CMF Buds 2a product page with technical specificationsNothing (US store, us.nothing.tech) — CMF Buds 2a product page with technical specificationsSennheiser HD 600 No source recorded. | Touch controls: double tap to skip forward or answer/hang up calls; triple tap to skip back or reject calls; tap and hold to switch between Active Noise Cancellation and Transparency Mode. | Not provided |
Static magnetic field at the surface SourcesNothing CMF Buds 2a No source recorded. Sennheiser HD 600 Manufacturer specification · Static magnetic field at the headphone surface. Sennheiser HD 600 — exact model specificationsSennheiser HD 600 — operating guide and specifications | Not provided | 1.8 mT |
Operating temperature SourcesNothing CMF Buds 2a No source recorded. | Not provided | −10 °C to +55 °C |
Supplied plug configuration SourcesNothing CMF Buds 2a No source recorded. Sennheiser HD 600 Sennheiser's manual and UK specification table list a 3.5 mm plug with a 6.35 mm adapter, while the UK page's connection text describes a 6.3 mm plug with a 3.5 mm adapter. Check the listing for the supplied plug. · Manufacturer specification · Needs a matching headphone output; the 4.4 mm balanced cable needs a balanced output. Sennheiser HD 600 — exact model specificationsSennheiser HD 600 — operating guide and specifications | Not provided | Conflicting sources |
|---|---|---|
Published acoustic changes SourcesNothing CMF Buds 2a No source recorded. Sennheiser HD 600 Sennheiser does not describe an acoustic revision for the HD 600. · Manufacturer specification Sennheiser HD 600 — exact model specificationsSennheiser HD 600 — operating guide and specifications | Not provided | Not listed by the manufacturer |
Manufacturer sub-bass claim SourcesNothing CMF Buds 2a No source recorded. Sennheiser HD 600 Sennheiser makes no sub-bass claim for the HD 600. · Manufacturer specification Sennheiser HD 600 — exact model specificationsSennheiser HD 600 — operating guide and specifications | Not provided | Not listed by the manufacturer |
Closest headphones to this pair by shared key specifications. Not a popularity ranking.
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.
