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Sennheiser Momentum True Wireless 4

Sennheiser Momentum True Wireless 4

By Sennheiser · Noise Cancelling Earbuds · Desk & Streaming Setup · More from Sennheiser

  • Bluetooth 5.4
  • Hybrid adaptive noise cancelling
  • Up to 7.5 hours per charge, about 30 hours with the case
  • IP54 dust and splash resistance
  • Support for aptX Adaptive and aptX Lossless

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New
Used, refurbished, open-box

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Problems, parts and running costs

Summary

Noise-cancelling true-wireless earbuds from Sennheiser, launched in 2024 and now end of life: Sennheiser US no longer sells them new, and the factory-certified refurbished pair is $99.95 (Sennheiser US, October 2026). Check the warranty terms before buying — the refurbished page promises one year, while the general US policy describes 90 days for remanufactured products.

Strengths

  • SoundGuys, What Hi-Fi? and RTINGS all praise the sound: rich, detailed and dynamic, with low distortion and consistent left/right matching.
  • SoundGuys measured 83% average noise reduction in its lab, with effective train-noise blocking.
  • Battery life holds up in testing: 7 hours 45 minutes at about 75 dB is over the maker’s 7.5-hour claim, under different conditions.
  • Five-band EQ, sound personalization, tip and fin choices and configurable touch controls give unusual control over fit and sound.
  • Sennheiser still sells genuine tips, ear fins, a case and a complete earbud pair, which is rare for a discontinued model.

Weaknesses

  • Owners in r/sennheiser report one earbud going silent — in one case the right channel, repeatedly, including on a replacement unit.
  • The microphones are the weak point: SoundGuys judged noise suppression below premium competition, and RTINGS notes speech can be cut by sudden background noises.
  • The housings are chunky, and RTINGS says they can turn uncomfortable over long sessions.
  • The batteries are sealed in and not user-replaceable, and the warranty treats batteries as consumables.
  • The case carries no water-resistance rating, and there is no wired fallback for the earbuds.

Verified specifications

ModelMOMENTUM True Wireless 4 (MTW4); earbuds MTW4 R / MTW4 L, charging case MTW4 C.
Color articlesBlack Graphite 700365, White Silver 700366, Black Copper 700367; later finishes such as Denim and Gold appeared after launch, so 700365 does not cover every color.
Drivers7-mm TrueResponse dynamic transducers; maker lists 5 Hz–21 kHz response, 107 dB SPL sensitivity and below 0.08% THD.
WirelessBluetooth 5.4 with SBC, AAC, aptX, aptX Adaptive, aptX Lossless and LC3; LE Audio and Auracast depend on firmware and source.
Noise cancellingadaptive hybrid ANC with adjustable transparency; three MEMS microphones per earbud (six total), with 100 Hz–10 kHz microphone response.
Battery75 mAh per earbud, 820 mAh in the case; built in, not advertised as user-replaceable.
Rated runtimeup to 7.5 hours per charge (ANC off), up to 7 hours (ANC on), up to 30 hours with the case; SoundGuys measured 7 hours 45 minutes at about 75 dB.
ChargingUSB-C and Qi wireless; the earbuds play Bluetooth audio only, with no wired input.
Water resistanceIP54 on the earbuds, not the case; no swimming, showers or immersion, and dry them before charging.
Weight and size6.2 g per earbud; the official table lists 72.4 g for case plus earbuds, yet quotes 66.4 g for the case and two 6.2 g buds, which sums to 78.8 g; case about 70.1 × 44.6 × 34.8 mm.
Fitsilicone tips XS, S, M (preinstalled) and L; stabilization fins S, M (preinstalled) and L.
AppSennheiser Smart Control with a five-band EQ, sound personalization, fit test and multipoint settings.
WarrantySennheiser’s US schedule of September 22, 2026 lists the MTW4 at 12 months.
Full research notes and sources

Sound and noise cancelling

SoundGuys’ March 2024 assessment praises balanced detail and bass with optional personalization; What Hi-Fi? called reproduction rich, organized and dynamic; RTINGS’ 2026 retest calls it good, with a bass emphasis, slightly darker treble and low distortion. Results depend on seal, tip size and noise content — 83% is not a promise about every environment. Calls are the weak spot: SoundGuys’ multi-environment recordings found noise suppression below premium competition and variable speech quality, and RTINGS notes sudden background noise can cut speech.

The single-bud failures

Two owner reports carry a real warning. On July 24, 2026 a buyer wrote in r/sennheiser that their right earbud stayed lit and touch-responsive but produced no sound, with something rattling inside; the first failure came three months after an August 2025 purchase, and the fault returned about eight months after a warranty replacement. On August 30, 2026 another owner reported three pairs failing in under 18 months — the right channel after about six months each on the first two pairs, then the left channel close to six months later — while describing warranty support as fast and courteous.

These are two accounts, not a failure rate, and nobody has published a denominator, teardown or batch analysis. Sennheiser’s manual says dirty charging contacts can imitate electrical failure, so clean the contacts and sound nozzles first; if a bud still plays nothing after cleaning, a factory reset and another phone, that is when to request an RMA.

Battery, parts and running costs

Rated at 7.5 hours per charge (ANC off) and 30 hours with the case, the MTW4 held up in SoundGuys’ standardized test at 7 hours 45 minutes and about 75 dB. The three cells are sealed: no user-install battery packs exist, and Sennheiser lists batteries as consumables, so a degraded battery is not a covered repair. Genuine parts are still sold direct: a five-pair set of tips is $9.95, ear fins are $9.95, a replacement case is $119.95 and a complete earbud pair is $199.95 — the spare case alone costs more than the whole refurbished set. There is no required subscription. On a hypothetical two-year cycle, one $9.95 tip set allocates about $4.98 a year; a set every year is $9.95 a year. A $99.95 refurbished pair amortizes to about $33.32 a year over an assumed three years, and a $249.95 new old-stock pair to about $83.32 — budgets, not lifespans, given the reported six-month failures.

Warranty and where to buy

Sennheiser’s US warranty was revised on September 22, 2026 and lists the MTW4 at 12 months for a qualifying first purchase from an authorized dealer; older marketing promised 24 months, and purchase-date terms may differ. Claims need an original dated receipt — bank statements and PayPal confirmations are rejected — and the customer pays inbound shipping. The refurbished product page promises a one-year manufacturer warranty, while the general policy paragraph covering remanufactured products says 90 days; get written confirmation before paying.

Checked October 19, 2026: Sennheiser US lists the factory-certified refurbished MTW4 at $99.95 with free shipping; the Walmart marketplace shows a new listing around $249.95 from a third-party seller, Newegg’s marketplace feed shows $249.95, and Headphones.com lists new stock at $349.95 — above the $299.95 MTW5. The new MTW5 launched in August 2026 with Bluetooth 6.0 and user-replaceable batteries.

Is it worth it?

New old stock below $140–160 with an authorized receipt could be attractive; above that, the failure reports and the 12-month warranty make it hard to justify, and at $250 or more the $299.95 MTW5 is the sensible buy with its replaceable batteries. Weigh the tip-and-fin fit work and the sealed batteries against the price before you commit.

Sources

Manufacturer:

Independent reviews:

Owner reports:

Parts and stores:

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