Sennheiser HD 660S2 · Moss Green
Over-ear · 2023
Sennheiser Momentum 4 Wireless
aptX Adaptive · 60hr · Audiophile tuning
Sennheiser HD 660S2 · Moss Green takes it — here’s why.
In our weighted Specdex score, Sennheiser HD 660S2 · Moss Green lands at 92 and Sennheiser Momentum 4 Wireless at 90. That puts Sennheiser HD 660S2 · Moss Green ahead by 2 points — a narrow margin driven mostly by its strengths in the categories below.
Pick Sennheiser HD 660S2 · Moss Green if…
- ✓Flagship comfort + ANC on modern models
- ✓Premium build
- ✓Active noise cancellation (most models)
Pick Sennheiser Momentum 4 Wireless if…
- ✓60-hour battery — best in class
- ✓Audiophile sound signature
- ✓Foldable for travel
Winner by scenario
Derived from the sub-score breakdown · not a separate testSound quality
Sennheiser Momentum 4 WirelessTuning, detail, and staging
Sennheiser Momentum 4 Wireless leads on sound (95 vs 92).
Noise cancelling
Sennheiser HD 660S2 · Moss GreenANC strength for commute and travel
Sennheiser HD 660S2 · Moss Green leads on anc (90 vs 84).
Comfort
TieLong-session wearability
Effectively tied — neither pulls a 2-point weighted lead.
Value for money
Sennheiser Momentum 4 WirelessSpecdex score per dollar at MSRP
Sennheiser Momentum 4 Wireless more score per dollar ($379 vs $599).
Score breakdown
Specs side-by-side
| Spec | Sennheiser HD 660S2 · Moss Green | Sennheiser Momentum 4 Wireless |
|---|---|---|
| Type | Over-ear | — |
| Release year | 2023 | — |
| Driver | — | 42 mm transducer |
| ANC | — | Adaptive Hybrid |
| Bluetooth | — | 5.2 |
| Codecs | — | aptX Adaptive + AAC + SBC |
| Battery | — | 60 hr (50 with ANC) |
| Charging | — | USB-C |
| Weight | — | 293 g |
Sennheiser HD 660S2 · Moss Green
- +Flagship comfort + ANC on modern models
- +Premium build
- +Active noise cancellation (most models)
- −Battery varies by codec
- −Some are Bluetooth-only
- −Price creep vs previous gen
Sennheiser Momentum 4 Wireless
- +60-hour battery — best in class
- +Audiophile sound signature
- +Foldable for travel
- −ANC trails Bose / Sony
- −No Auracast
- −App less polished
FAQ: Sennheiser HD 660S2 · Moss Green vs Sennheiser Momentum 4 Wireless
Which is better, Sennheiser HD 660S2 · Moss Green or Sennheiser Momentum 4 Wireless? +
Sennheiser HD 660S2 · Moss Green scores 92 on our weighted rubric — ahead by 2. Your best pick depends on the sub-scores above.
Is Sennheiser HD 660S2 · Moss Green worth the price? +
At $599, Sennheiser HD 660S2 · Moss Green delivers a Specdex score of 92 — strongest in sound.
Is Sennheiser Momentum 4 Wireless worth the price? +
At $379, Sennheiser Momentum 4 Wireless delivers a Specdex score of 90 — strongest in battery.
Does Sennheiser HD 660S2 · Moss Green or Sennheiser Momentum 4 Wireless last longer? +
Based on our long-term update and support ratings, both ship with multi-year support. Battery and reliability scores are visible in the breakdown above.
Which is better for sound quality, Sennheiser HD 660S2 · Moss Green or Sennheiser Momentum 4 Wireless? +
Sennheiser Momentum 4 Wireless — leads on sound (95 vs 92). Tuning, detail, and staging.
Which is better for noise cancelling, Sennheiser HD 660S2 · Moss Green or Sennheiser Momentum 4 Wireless? +
Sennheiser HD 660S2 · Moss Green — leads on anc (90 vs 84). ANC strength for commute and travel.