Black · model M5AEBT · Sennheiser part 800078
The MOMENTUM 5 Wireless (article 800078, black) is Sennheiser's closed-back, around-ear Bluetooth headphone (Bluetooth 5.4 per the manual and UK page) with hybrid adaptive noise cancellation, automatic wind-noise suppression, a Transparency Mode, Dolby Atmos spatial audio with head tracking, a 42 mm dynamic driver, a rated 57 hours of playback with ANC on and a battery the owner can replace. It folds flat for its carry case, and a touch pad on the right ear cup and Smart Pause on-head detection handle playback. Sennheiser's Smart Control Plus app adds EQ, sound modes and Sound Personalization. It also plays over USB-C from a computer or over a supplied analogue cable.
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Specifications checked 26 Sept 2026Manufacturer specifications, not a hands-on test.
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Sennheiser MOMENTUM 4 WirelessBlack · model M4AEBTThe rechargeable battery is designed to be swapped by the owner and the manual describes the removal steps; Sennheiser says the compatible BA 500 battery will be available in the EU and further selected countries, without naming the UK or US.
Sennheiser rates up to 57 hours of Bluetooth playback with ANC on, with about 2 hours for a full charge and 10 minutes giving up to 7 hours.
Codec support runs from SBC and AAC to aptX HD, aptX Lossless and aptX Adaptive, with two simultaneous Bluetooth connections and USB-C audio from a PC or Mac.
The analogue input is a 2.5 mm socket, so the supplied cable (or a similar one) is needed; plugging it in turns Bluetooth off.
Sennheiser's own documents disagree on the sensitivity figure (106 versus 108 dB at digital full scale), so it is shown as conflicting and cannot be compared with passive headphones' ratings anyway.
Mass is rated at about 290 g for the headphones alone.
Exact configuration: 800078 · Black · model M5AEBT
24 specifications in 7 groups. Values are manufacturer specifications unless a row says “Measured result” or “Calculated from cited specifications”.
Sennheiser's US store description: 'Soft padding, low headband pressure, and free-swiveling hinges contour to the head for maximum comfort; the fold-flat design and slim case make for ideal portability.' The UK specification table gives the product dimensions folded flat, and the manual says to fold up the headphones and place them in the carry case.
Approximate, headphones only; no cable-inclusive figure is published.
UK specification table: 'Product dimension (folded flat) 180 x 197 x 47 mm (7.08 x 7.75 x 1.85 in)'.
SourceThe manual states the compatible BA 500 battery 'will be available in the EU and further selected countries'; availability of the replacement battery in the UK or US is not stated.
Connecting the analogue cable switches Bluetooth off (flight mode). Bluetooth version: the manual ('The headphones are Bluetooth 5.4 compliant'), the UK page and the US store's feature list give Bluetooth 5.4, but the same US store description also says 'Bluetooth 6.0*' with an asterisk that the captured data does not explain; 5.4 is shown and the 6.0 statement is unexplained.
Sennheiser's test condition: iPhone at mid volume. User-replaceable 700 mAh battery.
The UK product page additionally lists Snapdragon Sound.
Capacity agrees across sources (manual 700 mAh, 2.59 Wh; UK page 700 mAh); the chemistry does not, see battery chemistry.
The instruction manual states a replaceable, rechargeable lithium-polymer battery; the UK product page states 'Exchangeable Lithium-Ion rechargeable batteries 700 mAh'.
The instruction manual states 106 dB SPL and the UK product page states 108 dB SPL, both at 1 kHz / 0 dBFS. Neither is preferred. · Digital full-scale reference; not comparable with passive headphones' dB/mW or dB/V ratings.
Dolby Atmos and head tracking are switched on or off separately in the Smart Control Plus app; with Dolby Atmos on and the app not running, the headphones use their built-in Dolby virtualizer.
Hybrid adaptive ANC with a Transparency Mode; ANC modes are selected in the Smart Control Plus app. Automatic wind-noise suppression (Sennheiser's improved Anti-Wind Mode): the manual's Wind Noise Reduction setting offers Off, Auto (automatically adjusted reduction of wind or movement noise) and Max.
MEMS speech microphones in a beamforming array for calls. The UK product page instead describes 4 mics per side.
SourceThe manual states the sound effects are stored in the headphones.
Touch-pad gestures cover volume, starting/pausing music playback, calls, and ANC or Transparency Mode adjustment; the touch pad function can be deactivated. The multi-function button also serves as the on/off, voice assistant and pairing button. With Smart Pause, putting on the headphones automatically accepts an incoming phone call, and taking them off during a call mutes it until they are put back on.
The UK product page's box list names a charging case; the manual lists a carry case. The manual list is shown.
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