Between the HD 660S2 and HD 800 S, the HD 660S2 comes out ahead in weight, while the HD 800 S wins on driver size. Overall, the HD 660S2 scores 64.2 and the HD 800 S scores 73.6 on our Mars Score.
Which should you buy?
The HD 800 S is the clear pick on raw spec strength, leading by 9.4 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 HD 660S2 if you carry the device everywhere and weight or thickness has been the deciding factor before. The biggest gaps in its favor are weight.
Pick the HD 800 S if you care most about driver size. Its strongest claims are driver size.
Both ship with comparable battery life, active noise cancellation, spatial audio, so those specs don't separate the two — focus on the differences below.
Bottom line: the HD 800 S is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why Sennheiser - HD 660S2 wins
- ▲Weight — 70.00 g less. 260 vs 330.
Why Sennheiser - HD 800 S wins
- ▲Driver size — 33.33% more. 56 mm vs 42 mm.
Spec comparison
Design
| Spec | Sennheiser - HD 660S2 | Sennheiser - HD 800 S |
|---|---|---|
| Type | over-ear | over-ear |
| Weight | 260 glead | 330 g |
| Water resistance | none | none |
Audio
| Spec | Sennheiser - HD 660S2 | Sennheiser - HD 800 S |
|---|---|---|
| Driver sizeⓘ | 42 mm | 56 mmlead |
| Impedanceⓘ | 300 Ω | 300 Ω |
| Sensitivityⓘ | 104 dBlead | 102 dB |
| Active noise cancellationⓘ | false | false |
| Transparency mode | false | false |
| Spatial audioⓘ | false | false |
Battery
| Spec | Sennheiser - HD 660S2 | Sennheiser - HD 800 S |
|---|---|---|
| Battery life | 0 h | 0 h |
| Fast chargeⓘ | false | false |
Connectivity
| Spec | Sennheiser - HD 660S2 | Sennheiser - HD 800 S |
|---|---|---|
| Bluetoothⓘ | 0 | 0 |
| Multipointⓘ | false | false |
| 3.5mm jack | true | true |
| LDACⓘ | false | false |
| aptX HDⓘ | false | false |
Frequently asked
Which has better battery life, HD 660S2 or HD 800 S?+
HD 800 S lasts 0 hours vs 0 hours.
Do HD 660S2 or HD 800 S have active noise cancellation?+
Neither model has ANC.
Which supports LDAC, HD 660S2 or HD 800 S?+
Neither supports LDAC.
Spec-level deep dives
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