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Bose QC45 — Over-ear · 2021
Bose

Bose QC45

Over-ear · 2021

88
/ 100
From $329
VS
Sennheiser HD 660S wins by 2
Sennheiser HD 660S — Open-back
Sennheiser

Sennheiser HD 660S

Open-back

90
/ 100
From $499
Specdex verdict

Sennheiser HD 660S takes it — here’s why.

In our weighted Specdex score, Bose QC45 lands at 88 and Sennheiser HD 660S at 90. That puts Sennheiser HD 660S ahead by 2 points — a narrow margin driven mostly by its strengths in the categories below.

Pick Bose QC45 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

Sennheiser HD 660S

Tuning, detail, and staging

Sennheiser HD 660S leads on sound (90 vs 88).

Noise cancelling

Bose QC45

ANC strength for commute and travel

Bose QC45 leads on anc (86 vs 0).

Comfort

Tie

Long-session wearability

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

Value for money

Bose QC45

Specdex score per dollar at MSRP

Bose QC45 more score per dollar ($329 vs $499).

Bose QC45 88
vs
90 Sennheiser HD 660S

Score breakdown

Bose QC45
88
anc 86
sound 88
comfort 87
battery 82
features 84
Sennheiser HD 660S
90
anc 0
sound 90
comfort 88
battery 100
features 50

Specs side-by-side

Bose QC45 versus Sennheiser HD 660S — full spec comparison
Spec Bose QC45 Sennheiser HD 660S
Type
Over-ear
Open-back
Release year
2021
—

Bose QC45

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: Bose QC45 vs Sennheiser HD 660S

Which is better, Bose QC45 or Sennheiser HD 660S? +

Sennheiser HD 660S scores 90 on our weighted rubric — ahead by 2. Your best pick depends on the sub-scores above.

Is Bose QC45 worth the price? +

At $329, Bose QC45 delivers a Specdex score of 88 — 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 Bose QC45 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 sound quality, Bose QC45 or Sennheiser HD 660S? +

Sennheiser HD 660S — leads on sound (90 vs 88). Tuning, detail, and staging.

Which is better for noise cancelling, Bose QC45 or Sennheiser HD 660S? +

Bose QC45 — leads on anc (86 vs 0). ANC strength for commute and travel.