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Side-by-Side Comparison
Sennheiser HD 660S2 Open-Back Audiophile Headphones vs beyerdynamic DT 770 PRO 80-Ohm Closed-Back Studio Headphones
By the numbers
| Sennheiser | beyerdynamic | |
|---|---|---|
| Amazon rating | 4.6★ | 4.6★ |
| Reviews | 4,200 | 17,257 |
| Price | $405.00 | $179.99 |
| Satisfaction score | 93% | 0% |
| Awards | 0 | 0 |
| Warranty | 2 years | 2-year manufacturer warranty |
| Made in | Ireland | Germany |
Sennheiser HD 660S2 Open-Back Audiophile Headphones
Pros
- Reference-class neutral sound
- Drivable from a phone amp
- Replaceable cable + earpads
- Made in Ireland
Cons
- Open-back leaks sound
- Premium price
beyerdynamic DT 770 PRO 80-Ohm Closed-Back Studio Headphones
Pros
- Every part replaceable (pads, headband, cable, drivers)
- Made in Heilbronn, Germany by beyerdynamic since 1924
- 80-ohm impedance — direct connection without separate amp
- Closed-back isolates studio bleed during tracking
Cons
- Coiled cable can be unwieldy at the desk
- Bright treble (slight emphasis 6-10 kHz)
- Velour pads (gray) — pleat shows wear after years (replaceable)
Our Verdict
Based on Amazon ratings, satisfaction scores from r/BuyItForLife sentiment analysis, award recognition from major review publications, and price/value, the Sennheiser HD 660S2 Open-Back Audiophile Headphones is our pick in this matchup. That said, both are community-vetted as buy-it-for-life products - either is a defensible choice. Read each product's full review before deciding: