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Sennheiser HD 660S · Moss Green — Open-back
Sennheiser

Sennheiser HD 660S · Moss Green

Open-back

90
/ 100
From $499
VS
Sennheiser Momentum 4 Wireless wins by 1
Sennheiser Momentum 4 Wireless — 42 mm drivers · 60 h battery · aptX Adaptive
Sennheiser

Sennheiser Momentum 4 Wireless

42 mm drivers · 60 h battery · aptX Adaptive

91
/ 100
From $349
Specdex verdict

Sennheiser Momentum 4 Wireless takes it — here’s why.

In our weighted Specdex score, Sennheiser HD 660S · Moss Green lands at 90 and Sennheiser Momentum 4 Wireless at 91. That puts Sennheiser Momentum 4 Wireless ahead by 1 points — a narrow margin driven mostly by its strengths in the categories below.

Pick Sennheiser HD 660S · Moss Green if…

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

Pick Sennheiser Momentum 4 Wireless if…

  • ✓Best-in-class 60h battery
  • ✓Warm, natural sound signature
  • ✓Superb build
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Winner by scenario

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

Sound quality

Sennheiser Momentum 4 Wireless

Tuning, detail, and staging

Sennheiser Momentum 4 Wireless leads on sound (96 vs 90).

Noise cancelling

Sennheiser Momentum 4 Wireless

ANC strength for commute and travel

Sennheiser Momentum 4 Wireless leads on anc (86 vs 0).

Comfort

Sennheiser Momentum 4 Wireless

Long-session wearability

Sennheiser Momentum 4 Wireless leads on comfort (92 vs 88).

Value for money

Sennheiser Momentum 4 Wireless

Specdex score per dollar at MSRP

Sennheiser Momentum 4 Wireless more score per dollar ($349 vs $499).

Sennheiser HD 660S · Moss Green 90
vs
91 Sennheiser Momentum 4 Wireless

Score breakdown

Sennheiser HD 660S · Moss Green
90
anc 0
sound 90
comfort 88
battery 100
features 50
Sennheiser Momentum 4 Wireless
91
anc 86
sound 96
comfort 92
battery 98
features 84

Specs side-by-side

Sennheiser HD 660S · Moss Green versus Sennheiser Momentum 4 Wireless — full spec comparison
Spec Sennheiser HD 660S · Moss Green Sennheiser Momentum 4 Wireless
Type
Open-back
—
Driver
—
42 mm dynamic
Battery
—
60 h (ANC on)
Weight
—
293 g

Sennheiser HD 660S · Moss Green

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 Momentum 4 Wireless

Pros
  • +Best-in-class 60h battery
  • +Warm, natural sound signature
  • +Superb build
Cons
  • −ANC trails Sony/Bose
  • −Bulky
  • −No multipoint until update

FAQ: Sennheiser HD 660S · Moss Green vs Sennheiser Momentum 4 Wireless

Which is better, Sennheiser HD 660S · Moss Green or Sennheiser Momentum 4 Wireless? +

Sennheiser Momentum 4 Wireless scores 91 on our weighted rubric — ahead by 1. Your best pick depends on the sub-scores above.

Is Sennheiser HD 660S · Moss Green worth the price? +

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

Is Sennheiser Momentum 4 Wireless worth the price? +

At $349, Sennheiser Momentum 4 Wireless delivers a Specdex score of 91 — strongest in battery.

Does Sennheiser HD 660S · Moss Green or Sennheiser Momentum 4 Wireless 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, Sennheiser HD 660S · Moss Green or Sennheiser Momentum 4 Wireless? +

Sennheiser Momentum 4 Wireless — leads on sound (96 vs 90). Tuning, detail, and staging.

Which is better for noise cancelling, Sennheiser HD 660S · Moss Green or Sennheiser Momentum 4 Wireless? +

Sennheiser Momentum 4 Wireless — leads on anc (86 vs 0). ANC strength for commute and travel.