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Sennheiser HD 650 · Navy Blue — Over-ear · 2003
Sennheiser

Sennheiser HD 650 · Navy Blue

Over-ear · 2003

90
/ 100
From $499
VS
Sennheiser HD 660S — Open-back
Sennheiser

Sennheiser HD 660S

Open-back

90
/ 100
From $499
Specdex verdict

Dead heat — it comes down to priorities.

In our weighted Specdex score, Sennheiser HD 650 · Navy Blue lands at 90 and Sennheiser HD 660S at 90. With scores tied, the decision hinges on which sub-scores matter most to you.

Pick Sennheiser HD 650 · Navy Blue if…

  • ✓Flagship comfort + ANC on modern models
  • ✓Premium build
  • ✓Active noise cancellation (most models)

Pick Sennheiser HD 660S 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

Sennheiser HD 650 · Navy Blue

ANC strength for commute and travel

Sennheiser HD 650 · Navy Blue leads on anc (88 vs 0).

Comfort

Tie

Long-session wearability

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

Value for money

Tie

Specdex score per dollar at MSRP

Effectively tied — similar score-per-dollar at MSRP.

Sennheiser HD 650 · Navy Blue 90
vs
90 Sennheiser HD 660S

Score breakdown

Sennheiser HD 650 · Navy Blue
90
anc 88
sound 90
comfort 89
battery 82
features 86
Sennheiser HD 660S
90
anc 0
sound 90
comfort 88
battery 100
features 50

Specs side-by-side

Sennheiser HD 650 · Navy Blue versus Sennheiser HD 660S — full spec comparison
Spec Sennheiser HD 650 · Navy Blue Sennheiser HD 660S
Type
Over-ear
Open-back
Release year
2003
—

Sennheiser HD 650 · Navy Blue

Pros
  • +Flagship comfort + ANC on modern models
  • +Premium build
  • +Active noise cancellation (most models)
Cons
  • −Battery varies by codec
  • −Some are Bluetooth-only
  • −Price creep vs previous gen

Sennheiser HD 660S

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 650 · Navy Blue vs Sennheiser HD 660S

Which is better, Sennheiser HD 650 · Navy Blue or Sennheiser HD 660S? +

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

Is Sennheiser HD 650 · Navy Blue worth the price? +

At $499, Sennheiser HD 650 · Navy Blue delivers a Specdex score of 90 — strongest in sound.

Is Sennheiser HD 660S worth the price? +

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

Does Sennheiser HD 650 · Navy Blue or Sennheiser HD 660S 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 noise cancelling, Sennheiser HD 650 · Navy Blue or Sennheiser HD 660S? +

Sennheiser HD 650 · Navy Blue — leads on anc (88 vs 0). ANC strength for commute and travel.