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Sennheiser HD 660S · Navy Blue — Open-back
Sennheiser

Sennheiser HD 660S · Navy Blue

Open-back

90
/ 100
From $499
VS
Sennheiser HD 6XX — Open-back
Sennheiser

Sennheiser HD 6XX

Open-back

90
/ 100
From $219
Specdex verdict

Dead heat — it comes down to priorities.

In our weighted Specdex score, Sennheiser HD 660S · Navy Blue lands at 90 and Sennheiser HD 6XX at 90. With scores tied, the decision hinges on which sub-scores matter most to you.

Pick Sennheiser HD 660S · Navy Blue if…

  • ✓Reference-level detail
  • ✓Well-regarded in audiophile community
  • ✓Long-term ownership appeal

Pick Sennheiser HD 6XX if…

  • ✓Reference-level detail
  • ✓Well-regarded in audiophile community
  • ✓Long-term ownership appeal
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Winner by scenario

Derived from the sub-score breakdown · not a separate test

Sound quality

Tie

Tuning, detail, and staging

Effectively tied — neither pulls a 2-point weighted lead.

Noise cancelling

Tie

ANC strength for commute and travel

Effectively tied — neither pulls a 2-point weighted lead.

Comfort

Tie

Long-session wearability

Effectively tied — neither pulls a 2-point weighted lead.

Value for money

Sennheiser HD 6XX

Specdex score per dollar at MSRP

Sennheiser HD 6XX more score per dollar ($219 vs $499).

Sennheiser HD 660S · Navy Blue 90
vs
90 Sennheiser HD 6XX

Score breakdown

Sennheiser HD 660S · Navy Blue
90
anc 0
sound 90
comfort 88
battery 100
features 50
Sennheiser HD 6XX
90
anc 0
sound 90
comfort 88
battery 100
features 50

Specs side-by-side

Sennheiser HD 660S · Navy Blue versus Sennheiser HD 6XX — full spec comparison
Spec Sennheiser HD 660S · Navy Blue Sennheiser HD 6XX
Type
Open-back
Open-back

Sennheiser HD 660S · Navy Blue

Pros
  • +Reference-level detail
  • +Well-regarded in audiophile community
  • +Long-term ownership appeal
Cons
  • −Requires amplifier (most)
  • −No active noise cancellation
  • −Impractical for commuting

Sennheiser HD 6XX

Pros
  • +Reference-level detail
  • +Well-regarded in audiophile community
  • +Long-term ownership appeal
Cons
  • −Requires amplifier (most)
  • −No active noise cancellation
  • −Impractical for commuting

FAQ: Sennheiser HD 660S · Navy Blue vs Sennheiser HD 6XX

Which is better, Sennheiser HD 660S · Navy Blue or Sennheiser HD 6XX? +

Both score 90 on our weighted rubric — tied. Your best pick depends on the sub-scores above.

Is Sennheiser HD 660S · Navy Blue worth the price? +

At $499, Sennheiser HD 660S · Navy Blue delivers a Specdex score of 90 — strongest in battery.

Is Sennheiser HD 6XX worth the price? +

At $219, Sennheiser HD 6XX delivers a Specdex score of 90 — strongest in battery.

Does Sennheiser HD 660S · Navy Blue or Sennheiser HD 6XX 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 the better value, Sennheiser HD 660S · Navy Blue or Sennheiser HD 6XX? +

Sennheiser HD 6XX — more score per dollar ($219 vs $499). Specdex score per dollar at MSRP.