Sennheiser - Accentum True Wireless vs Master & Dynamic - MW09
Between the Accentum True Wireless and MW09, the Accentum True Wireless comes out ahead in several specs, while the MW09 wins on battery — buds and battery — with case. Overall, the Accentum True Wireless scores 55.5 and the MW09 scores 79.3 on our Mars Score.
Which should you buy?
The MW09 is the clear pick on raw spec strength, leading by 23.8 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.
The Accentum True Wireless doesn't pull ahead on any single popular-comparison spec — its strengths sit in the spec table groups rather than the headline advantages.
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. Its strongest claims are battery — buds, battery — with case, driver size, among others.
Both ship with comparable active noise cancellation, weight per bud, spatial audio, so those specs don't 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.
Why Sennheiser - Accentum True Wireless wins
- No decisive advantages.
Why Master & Dynamic - MW09 wins
- ▲Battery — buds — 100.00% more. 16 h vs 8 h.
- ▲Battery — with case — 71.43% more. 48 h vs 28 h.
- ▲Driver size — 57.14% more. 11 mm vs 7 mm.
- ▲Water resistance: IP57 (vs IPX4).
Spec comparison
Design
| Spec | Sennheiser - Accentum True Wireless | Master & Dynamic - MW09 |
|---|---|---|
| Form factor | in-ear | in-ear |
| Weight per bud | 6.0 g | 6 g |
| Water resistanceⓘ | IPX4 | IP57lead |
Audio
| Spec | Sennheiser - Accentum True Wireless | Master & Dynamic - MW09 |
|---|---|---|
| Driver sizeⓘ | 7 mm | 11 mmlead |
| Active noise cancellationⓘ | true | true |
| Transparency mode | true | true |
| Spatial audioⓘ | false | false |
Battery
| Spec | Sennheiser - Accentum True Wireless | Master & Dynamic - MW09 |
|---|---|---|
| Battery — buds | 8 h | 16 hlead |
| Battery — with case | 28 h | 48 hlead |
| Wireless case chargingⓘ | false | truelead |
Connectivity
| Spec | Sennheiser - Accentum True Wireless | Master & Dynamic - MW09 |
|---|---|---|
| Bluetoothⓘ | 5.3 | 5.4lead |
| Codecs | aptX,AAC,SBC | aptX Lossless,aptX Adaptive,AAC,SBC |
| Multipointⓘ | true | true |
| In-ear detection | false | truelead |
Frequently asked
Which has longer battery, Accentum True Wireless or MW09?+
MW09 lasts 16h per charge vs 8h.
Do Accentum True Wireless or MW09 support multipoint?+
Both support multipoint pairing.
Which has ANC, Accentum True Wireless or MW09?+
Both have active noise cancellation.
Spec-level deep dives
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