Sony - LinkBuds Open vs Sennheiser - Momentum True Wireless 4
Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Sony - LinkBuds Open | Sennheiser - Momentum True Wireless 4 |
|---|---|---|
| Driver size | 11 mm | 7 mm |
| Battery — with case | 22 h | 30 h |
| Battery — buds | 8 h | 7.5 h |
| Weight per bud | 5.1 g | 6.2 g |
| Active noise cancellation | false | true |
| Water resistance | IPX4 | IP54 |
Between the LinkBuds Open and Momentum True Wireless 4, the LinkBuds Open comes out ahead in driver size / battery — buds, while the Momentum True Wireless 4 wins on battery — with case / active noise cancellation. Overall, the LinkBuds Open scores 63.6 and the Momentum True Wireless 4 scores 70.7 on our Mars Score.
Which should you buy?
The Momentum True Wireless 4 edges ahead on the Mars Score (63.6 vs 70.7), but the 7.1-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the LinkBuds Open if your top frustration with your current device is running out of charge before the day ends — endurance is the lead spec here. The biggest gaps in its favor are driver size, battery — buds, weight per bud. The single most decisive one: Driver size — 57.14% more. 11 mm vs 7 mm.
Pick the Momentum True Wireless 4 if audio quality and feature breadth (ANC, codecs, multipoint) are the lead criteria for your purchase. Its strongest claims are battery — with case, active noise cancellation, water resistance. The single most decisive one: Battery — with case — 36.36% more. 30 h vs 22 h.
Both ship with comparable spatial audio, multipoint, so those specs do not separate the two — focus on the differences below.
Bottom line: the Momentum True Wireless 4 is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Which should you buy: Sony - LinkBuds Open or Sennheiser - Momentum True Wireless 4?
Sennheiser - Momentum True Wireless 4 leads the current Mars Score by 7.1 points.The more useful decision is the trade-off behind that result: compare driver size, battery — buds, weight per bud against the way you will actually use the product.
Choose Sony - LinkBuds Open if…
Sony - LinkBuds Open has the measurable edge on driver size mm, battery life buds h, weight per bud g.
Choose Sennheiser - Momentum True Wireless 4 if…
Sennheiser - Momentum True Wireless 4 has the measurable edge on battery life case h, has anc, ip rating.
This is a structured comparison of the published catalog values. It is not a claim of identical real-world performance across every workload; use the linked spec drill-downs and methodology page to inspect the inputs.
Why Sony - LinkBuds Open wins
- ▲Driver size — 57.14% more. 11 mm vs 7 mm.
- ▲Battery — buds — 6.67% more. 8 h vs 7.5 h.
- ▲Weight per bud — 1.10 g less. 5.1 vs 6.2.
Why Sennheiser - Momentum True Wireless 4 wins
- ▲Battery — with case — 36.36% more. 30 h vs 22 h.
- ▲Has Active noise cancellation.
- ▲Water resistance: IP54 (vs IPX4).
Spec comparison
Design
| Spec | Sony - LinkBuds Open | Sennheiser - Momentum True Wireless 4 |
|---|---|---|
| Form factor | openlead | in-ear |
| Weight per bud | 5.1 glead | 6.2 g |
| Water resistanceⓘ | IPX4 | IP54lead |
Audio
| Spec | Sony - LinkBuds Open | Sennheiser - Momentum True Wireless 4 |
|---|---|---|
| Driver sizeⓘ | 11 mmlead | 7 mm |
| Active noise cancellationⓘ | false | truelead |
| Transparency mode | false | truelead |
| Spatial audioⓘ | true | true |
Battery
| Spec | Sony - LinkBuds Open | Sennheiser - Momentum True Wireless 4 |
|---|---|---|
| Battery — buds | 8 hlead | 7.5 h |
| Battery — with case | 22 h | 30 hlead |
| Wireless case chargingⓘ | false | truelead |
Connectivity
| Spec | Sony - LinkBuds Open | Sennheiser - Momentum True Wireless 4 |
|---|---|---|
| Bluetoothⓘ | 5.3 | 5.4lead |
| Codecsⓘ | AAC,SBC | aptX Lossless,LC3,AAC,SBC |
| Multipointⓘ | true | true |
| In-ear detection | false | truelead |
Frequently asked
Which has longer battery, LinkBuds Open or Momentum True Wireless 4?+
LinkBuds Open lasts 8h per charge vs 7.5h.
Do LinkBuds Open or Momentum True Wireless 4 support multipoint?+
Both support multipoint pairing.
Which has ANC, LinkBuds Open or Momentum True Wireless 4?+
Momentum True Wireless 4 has active noise cancellation; LinkBuds Open does not.