Sennheiser MOMENTUM TW4 Review: Check the Phone and Stock First

The Sennheiser MOMENTUM True Wireless 4 makes sense if you want adjustable sound and have a source that actually supports its advanced codecs. The important buying question in 2026 is whether a remaining-stock pair has a sensible price, a clear warranty, and a return policy that lets you check fit.

Stock check, 8 September 2026: Sennheiser's US product page labels the model End of Life and says it is no longer sold on that website. That does not establish availability at other retailers. We could not validate a US Amazon listing for the TW4 during this update, so there is no Amazon purchase link for it here. For any listing you find, check the exact model, seller, condition, and warranty. Sennheiser US product page.

This is a research-based review of official specifications and support documentation. SolderMag has not completed hands-on testing of this model; fit, sound preference, microphone performance, and long-term battery behaviour remain questions to evaluate yourself.

SolderMag Take

Buy the TW4 for features you can use: a compatible audio source, sound adjustment, and a fit that suits your ears. Do not pay extra just because a listing says “lossless.” The phone, connection conditions, and earbud settings all matter.

For a general-purpose earbud purchase, compare the delivered price with the alternatives in our true wireless earbuds guide. An older flagship is a poor saving if the seller cannot clearly explain the warranty or accept a return for a bad fit.

Key specifications

Specifications: Sennheiser UK product details and Sennheiser TW4 FAQ.

aptX Lossless: check the entire connection

Sennheiser's FAQ specifies a compatible aptX Adaptive Lossless source and the Lossless mode in its app. A phone having a recent Snapdragon processor does not, by itself, establish support. Use the exact phone model's specification and Qualcomm's device information.

The app can show which codec is active. Sennheiser also explains that the connection may fall back to its standard mode when conditions require it. “Lossless selected” and “lossless active” are different things. TW4 codec guidance.

Our buying judgement: check this before buying, rather than buying a second adapter afterwards to justify the earbuds. A better codec is not a promise that you will prefer the tuning or hear a difference on every track.

Sound adjustment, fit, and calls

The sound controls include a five-band EQ and guided Sound Personalization. Use the guided option as a starting point if you want to adjust the sound without choosing individual EQ settings. Sennheiser feature list.

Start by checking the seal before changing the EQ. If the tips do not sit securely, consider a different size in each ear. The aim is a stable seal without pressure that becomes distracting over a normal listening session. Our earbud buying guide covers the broader choices.

For work calls, record a sample with your actual laptop and meeting app during the return period. Microphone count does not establish how a listener will hear you against traffic, wind, or nearby speech. We do not have comparable recordings to rank this model against Sony or Bose.

Battery and ownership trade-offs

The advertised runtime is an upper limit under specified conditions. Plan around your longest uninterrupted session, not the case-inclusive total. Someone taking calls throughout a workday has a different requirement from someone listening for an hour on a train.

Sennheiser says the batteries in the earbuds and case cannot be exchanged. That makes condition and seller support especially relevant for remaining stock. For cleaning and charging, follow the manufacturer's guidance: the case is not splash-resistant, and wet earbuds should dry before docking. TW4 ownership FAQ.

Who should buy, and who should skip

Consider them if your source supports the features you want, the seller's terms are clear, and you want the app's sound adjustment. The price should reflect their position as an older model.

Skip them if the listing is vague about condition or warranty, you need replaceable batteries, or you are paying a premium for an audio mode your phone cannot use. For calls-first buying, begin with our earbuds for phone calls guide.

Alternatives

The Sony WF-1000XM5 and original Bose QuietComfort Ultra Earbuds are older alternatives worth comparing when the seller offers a clear warranty and a useful saving. Check the generation carefully: a low price on an earlier model does not establish better value than its successor.

If an in-ear seal itself is the problem, compare over-ear designs through our Sony WH-1000XM6 review and noise-cancelling headphones guide.

Verdict

The TW4 is a conditional purchase: useful sound controls and advanced codec options, with stock status, battery serviceability, and source compatibility that deserve attention before checkout. We would choose it only when the delivered price and seller support make that trade-off worthwhile.

Does aptX Lossless work with every Android phone?

No. Check explicit support on the exact source device and confirm the active codec in the app. A processor name or Bluetooth version is insufficient.

Is the 30-hour figure one earbud charge?

No. It includes the charging case. Sennheiser specifies up to 7 hours per earbud charge with ANC enabled.

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