Audio-Technica - ATH-M50xBT2 vs Sennheiser - HD 660S2
Between the ATH-M50xBT2 and HD 660S2, the ATH-M50xBT2 comes out ahead in driver size and multipoint, while the HD 660S2 wins on weight. Overall, the ATH-M50xBT2 scores 74.2 and the HD 660S2 scores 61.4 on our Mars Score.
Which should you buy?
The ATH-M50xBT2 is the clear pick on raw spec strength, leading by 12.8 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.
Pick the ATH-M50xBT2 if audio quality and feature breadth (ANC, codecs, multipoint) are the lead criteria for your purchase. The biggest gaps in its favor are driver size, multipoint, ldac, among others.
Pick the HD 660S2 if you carry the device everywhere and weight or thickness has been the deciding factor before. Its strongest claims are weight.
Both ship with comparable active noise cancellation, spatial audio, water resistance, so those specs don't separate the two — focus on the differences below.
Bottom line: the ATH-M50xBT2 is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why Audio-Technica - ATH-M50xBT2 wins
- ▲Driver size — 18.42% more. 45 mm vs 38 mm.
- ▲Has Multipoint.
- ▲Has LDAC.
- ▲Battery life: 50 h vs 0 h.
Why Sennheiser - HD 660S2 wins
- ▲Weight — 47.00 g less. 260 vs 307.
Spec comparison
Design
| Spec | Audio-Technica - ATH-M50xBT2 | Sennheiser - HD 660S2 |
|---|---|---|
| Type | over-ear | over-ear |
| Weight | 307 g | 260 glead |
| Water resistance | none | none |
Audio
| Spec | Audio-Technica - ATH-M50xBT2 | Sennheiser - HD 660S2 |
|---|---|---|
| Driver sizeⓘ | 45 mmlead | 38 mm |
| Impedanceⓘ | 38 Ω | 300 Ωlead |
| Sensitivityⓘ | 99 dB | 104 dBlead |
| Active noise cancellationⓘ | false | false |
| Transparency mode | false | false |
| Spatial audioⓘ | false | false |
Battery
| Spec | Audio-Technica - ATH-M50xBT2 | Sennheiser - HD 660S2 |
|---|---|---|
| Battery life | 50 hlead | 0 h |
| Fast chargeⓘ | truelead | false |
Connectivity
| Spec | Audio-Technica - ATH-M50xBT2 | Sennheiser - HD 660S2 |
|---|---|---|
| Bluetoothⓘ | 5.0lead | 0.0 |
| Multipointⓘ | truelead | false |
| 3.5mm jack | true | true |
| LDACⓘ | truelead | false |
| aptX HDⓘ | truelead | false |
Frequently asked
Which has better battery life, ATH-M50xBT2 or HD 660S2?+
ATH-M50xBT2 lasts 50 hours vs 0 hours.
Do ATH-M50xBT2 or HD 660S2 have active noise cancellation?+
Neither model has ANC.
Which supports LDAC, ATH-M50xBT2 or HD 660S2?+
ATH-M50xBT2 supports LDAC; HD 660S2 does not.
Spec-level deep dives
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