Comparison guide
Sennheiser Momentum True Wireless 4 vs Bose Ultra Open Earbuds: which should you choose?
Sennheiser Momentum True Wireless 4 and Bose Ultra Open Earbuds compared under one framework. One recorded specification difference is Battery with case: 30 h on the Sennheiser Momentum True Wireless 4 against 27 h on the Bose Ultra Open Earbuds. Specifications and their sources are recorded alongside.
Published: 2026-08-09 · Updated: 2026-09-21
Earbuds verdict
Undocumented scoring basis · overall score and upgrade ranking withheld. The table records stored representative configurations; confirm the configuration and price on the merchant page before buying.
- Sennheiser Momentum True Wireless 4: Wireless for audiophiles — aptX Lossless and a 7mm TrueResponse driver keep every detail alive.
- Bose Ultra Open Earbuds: An ear-clip that leaves your ears open — hear your surroundings during workouts and outdoors with Bose sound.
- Undocumented quality and performance advantages are not ranked
- Specification field coverage (not accuracy): 100%
Choosing between Sennheiser Momentum True Wireless 4 and Bose Ultra Open Earbuds starts with the real use case and the problem to solve, not with which product is newer. No independent laboratory test is implied.
Core specifications on one baseline
| Item | Sennheiser Momentum True Wireless 4 | Bose Ultra Open Earbuds | Delta |
|---|---|---|---|
| Battery per bud | 7.5 h AskRS catalog index · check date not recorded | 7.5 h AskRS catalog index · check date not recorded | Same |
| Battery with case | 30 h AskRS catalog index · check date not recorded | 27 h AskRS catalog index · check date not recorded | -10% |
| Driver size | 7 mm AskRS catalog index · check date not recorded | 12 mm AskRS catalog index · check date not recorded | +71.4% |
| Weight per bud | 6.2 g AskRS catalog index · check date not recorded | 6.4 g AskRS catalog index · check date not recorded | +3.2% |
| ANC type | Adaptive hybrid ANC | Open-ear (no ANC) | Different |
| Chipset | Qualcomm S5 Sound Gen 2 | Bose audio SoC | Different |
| Codecs | aptX Lossless, aptX Adaptive, AAC, SBC | aptX Adaptive, AAC, SBC | Different |
| Color | Graphite | Black | Different |
| Connectivity | Bluetooth 5.4, aptX Lossless, aptX Adaptive, AAC, SBC, LE Audio | Bluetooth 5.3, aptX Adaptive, AAC, SBC | Different |
| Region | GLOBAL | GLOBAL | Same |
| Water resistance | IP54 | IPX4 | Different |
8 of the 22 values in this table carry a source. The rest have no source on record, which is not the same as being wrong.
How to read Same, Different, No data, Unverified and Not applicable is documented on the configuration-level specification screen. If a condition you require is unknown, withhold the decision and match the exact model, sales region and configuration against the sources on that screen.
Differences recorded in the table
3 fields can be ranked on the same basis, listed by weight.
- Battery with case · Sennheiser Momentum True Wireless 4 30 h, Bose Ultra Open Earbuds 27 h (-10%)
- Driver size · Bose Ultra Open Earbuds 12 mm, Sennheiser Momentum True Wireless 4 7 mm (+71.4%)
- Weight per bud · Sennheiser Momentum True Wireless 4 6.2 g, Bose Ultra Open Earbuds 6.4 g (+3.2%)
The decision axes and the checking order for the whole category are on the Earbuds comparison page.
The two products this comparison names
Match the listing against these models first. The recorded-field count is catalogue completeness, not product quality.
- Sennheiser Momentum True Wireless 4 · Sennheiser · model number M4TW · released 2024 · recorded fields 11/11
- Bose Ultra Open Earbuds · Bose · model number 881046 · released 2024 · recorded fields 11/11
Fields the two products share
2 recorded fields hold the same value for both stored representative configurations, so nothing in this list separates them.
- Battery per bud · 7.5 h
- Region · GLOBAL
Who should choose Sennheiser Momentum True Wireless 4
Sennheiser Momentum True Wireless 4 leads the table on Battery with case, Weight per bud. Wireless for audiophiles — aptX Lossless and a 7mm TrueResponse driver keep every detail alive.
Who should choose Bose Ultra Open Earbuds
Bose Ultra Open Earbuds leads the table on Driver size. An ear-clip that leaves your ears open — hear your surroundings during workouts and outdoors with Bose sound.
How to read price and purchase availability
No merchant link is shown: neither product has an approved listing whose name and configuration match the catalogue, and AsKrs does not guess a destination.
- Sennheiser Momentum True Wireless 4 · No verified purchase link currently available
- Bose Ultra Open Earbuds · No verified purchase link currently available
This comparison is built from published specifications and stored representative configurations. The use context, configuration checks, switching costs, and the scope and limits for Earbuds are documented on the Earbuds comparison page.