64 Audio U12t
IEM
Sennheiser HD 660S2 · Moss Green
Over-ear · 2023
64 Audio U12t takes it — here’s why.
In our weighted Specdex score, 64 Audio U12t lands at 95 and Sennheiser HD 660S2 · Moss Green at 92. That puts 64 Audio U12t ahead by 3 points — a narrow margin driven mostly by its strengths in the categories below.
Pick 64 Audio U12t if…
- ✓Reference-level detail
- ✓Well-regarded in audiophile community
- ✓Long-term ownership appeal
Pick Sennheiser HD 660S2 · Moss Green if…
- ✓Flagship comfort + ANC on modern models
- ✓Premium build
- ✓Active noise cancellation (most models)
Winner by scenario
Derived from the sub-score breakdown · not a separate testSound quality
64 Audio U12tTuning, detail, and staging
64 Audio U12t 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 0).
Comfort
Sennheiser HD 660S2 · Moss GreenLong-session wearability
Sennheiser HD 660S2 · Moss Green leads on comfort (91 vs 88).
Value for money
Sennheiser HD 660S2 · Moss GreenSpecdex score per dollar at MSRP
Sennheiser HD 660S2 · Moss Green more score per dollar ($599 vs $1,999).
Score breakdown
Specs side-by-side
| Spec | 64 Audio U12t | Sennheiser HD 660S2 · Moss Green |
|---|---|---|
| Type | IEM | Over-ear |
| Release year | — | 2023 |
64 Audio U12t
- +Reference-level detail
- +Well-regarded in audiophile community
- +Long-term ownership appeal
- −Requires amplifier (most)
- −No active noise cancellation
- −Impractical for commuting
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
FAQ: 64 Audio U12t vs Sennheiser HD 660S2 · Moss Green
Which is better, 64 Audio U12t or Sennheiser HD 660S2 · Moss Green? +
64 Audio U12t scores 95 on our weighted rubric — ahead by 3. Your best pick depends on the sub-scores above.
Is 64 Audio U12t worth the price? +
At $1,999, 64 Audio U12t delivers a Specdex score of 95 — strongest in battery.
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.
Does 64 Audio U12t or Sennheiser HD 660S2 · Moss Green 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, 64 Audio U12t or Sennheiser HD 660S2 · Moss Green? +
64 Audio U12t — leads on sound (95 vs 92). Tuning, detail, and staging.
Which is better for noise cancelling, 64 Audio U12t or Sennheiser HD 660S2 · Moss Green? +
Sennheiser HD 660S2 · Moss Green — leads on anc (90 vs 0). ANC strength for commute and travel.