Master & Dynamic - MW09 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 | Master & Dynamic - MW09 | Sennheiser - Momentum True Wireless 4 |
|---|---|---|
| Battery — buds | 16 h | 7.5 h |
| Battery — with case | 48 h | 30 h |
| Driver size | 11 mm | 7 mm |
| Spatial audio | false | true |
| Water resistance | IP57 | IP54 |
| Weight per bud | 6 g | 6.2 g |
Between the MW09 and Momentum True Wireless 4, the MW09 comes out ahead in battery — buds / battery — with case, while the Momentum True Wireless 4 wins on spatial audio. Overall, the MW09 scores 86.1 and the Momentum True Wireless 4 scores 70.7 on our Mars Score.
Which should you buy?
The MW09 is the clear pick on raw spec strength, leading by 15.4 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.
Pick the MW09 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 battery — buds, battery — with case, driver size, among others. The single most decisive one: Battery — buds — 113.33% more. 16 h vs 7.5 h.
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 spatial audio. The single most decisive one: Has Spatial audio.
Both ship with comparable active noise cancellation, multipoint, so those specs do not separate the two — focus on the differences below.
Bottom line: the MW09 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: Master & Dynamic - MW09 or Sennheiser - Momentum True Wireless 4?
Master & Dynamic - MW09 leads the current Mars Score by 15.4 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 Master & Dynamic - MW09 if…
Master & Dynamic - MW09 has the measurable edge on battery life buds h, battery life case h, driver size mm.
Choose Sennheiser - Momentum True Wireless 4 if…
Sennheiser - Momentum True Wireless 4 has the measurable edge on has spatial audio.
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 Master & Dynamic - MW09 wins
- ▲Battery — buds — 113.33% more. 16 h vs 7.5 h.
- ▲Battery — with case — 60.00% more. 48 h vs 30 h.
- ▲Driver size — 57.14% more. 11 mm vs 7 mm.
- ▲Water resistance: IP57 (vs IP54).
- ▲Weight per bud — 0.20 g less. 6 vs 6.2.
Why Sennheiser - Momentum True Wireless 4 wins
- ▲Has Spatial audio.
Spec comparison
Design
| Spec | Master & Dynamic - MW09 | Sennheiser - Momentum True Wireless 4 |
|---|---|---|
| Form factor | in-ear | in-ear |
| Weight per bud | 6 glead | 6.2 g |
| Water resistanceⓘ | IP57lead | IP54 |
Audio
| Spec | Master & Dynamic - MW09 | Sennheiser - Momentum True Wireless 4 |
|---|---|---|
| Driver sizeⓘ | 11 mmlead | 7 mm |
| Active noise cancellationⓘ | true | true |
| Transparency mode | true | true |
| Spatial audioⓘ | false | truelead |
Battery
| Spec | Master & Dynamic - MW09 | Sennheiser - Momentum True Wireless 4 |
|---|---|---|
| Battery — buds | 16 hlead | 7.5 h |
| Battery — with case | 48 hlead | 30 h |
| Wireless case chargingⓘ | true | true |
Connectivity
| Spec | Master & Dynamic - MW09 | Sennheiser - Momentum True Wireless 4 |
|---|---|---|
| Bluetoothⓘ | 5.4 | 5.4 |
| Codecsⓘ | aptX Lossless,aptX Adaptive,AAC,SBC | aptX Lossless,LC3,AAC,SBC |
| Multipointⓘ | true | true |
| In-ear detection | true | true |
Frequently asked
Which has longer battery, MW09 or Momentum True Wireless 4?+
MW09 lasts 16h per charge vs 7.5h.
Do MW09 or Momentum True Wireless 4 support multipoint?+
Both support multipoint pairing.
Which has ANC, MW09 or Momentum True Wireless 4?+
Both models have active noise cancellation.