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Sennheiser HD 660S · Midnight Black — Open-back
Sennheiser

Sennheiser HD 660S · Midnight Black

Open-back

90
/ 100
From $499
VS
Sennheiser Momentum 4 Wireless — aptX Adaptive · 60hr · Audiophile tuning
Sennheiser

Sennheiser Momentum 4 Wireless

aptX Adaptive · 60hr · Audiophile tuning

90
/ 100
From $379
Specdex verdict

Dead heat — it comes down to priorities.

In our weighted Specdex score, Sennheiser HD 660S · Midnight Black lands at 90 and Sennheiser Momentum 4 Wireless at 90. With scores tied, the decision hinges on which sub-scores matter most to you.

Pick Sennheiser HD 660S · Midnight Black if…

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

Pick Sennheiser Momentum 4 Wireless if…

  • ✓60-hour battery — best in class
  • ✓Audiophile sound signature
  • ✓Foldable for travel
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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 (95 vs 90).

Noise cancelling

Sennheiser Momentum 4 Wireless

ANC strength for commute and travel

Sennheiser Momentum 4 Wireless leads on anc (84 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 ($379 vs $499).

Sennheiser HD 660S · Midnight Black 90
vs
90 Sennheiser Momentum 4 Wireless

Score breakdown

Sennheiser HD 660S · Midnight Black
90
anc 0
sound 90
comfort 88
battery 100
features 50
Sennheiser Momentum 4 Wireless
90
anc 84
sound 95
comfort 92
battery 100
features 84

Specs side-by-side

Sennheiser HD 660S · Midnight Black versus Sennheiser Momentum 4 Wireless — full spec comparison
Spec Sennheiser HD 660S · Midnight Black Sennheiser Momentum 4 Wireless
Type
Open-back
—
Driver
—
42 mm transducer
ANC
—
Adaptive Hybrid
Bluetooth
—
5.2
Codecs
—
aptX Adaptive + AAC + SBC
Battery
—
60 hr (50 with ANC)
Charging
—
USB-C
Weight
—
293 g

Sennheiser HD 660S · Midnight Black

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
  • +60-hour battery — best in class
  • +Audiophile sound signature
  • +Foldable for travel
Cons
  • −ANC trails Bose / Sony
  • −No Auracast
  • −App less polished

FAQ: Sennheiser HD 660S · Midnight Black vs Sennheiser Momentum 4 Wireless

Which is better, Sennheiser HD 660S · Midnight Black or Sennheiser Momentum 4 Wireless? +

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

Is Sennheiser HD 660S · Midnight Black worth the price? +

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

Is Sennheiser Momentum 4 Wireless worth the price? +

At $379, Sennheiser Momentum 4 Wireless delivers a Specdex score of 90 — strongest in battery.

Does Sennheiser HD 660S · Midnight Black 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 · Midnight Black or Sennheiser Momentum 4 Wireless? +

Sennheiser Momentum 4 Wireless — leads on sound (95 vs 90). Tuning, detail, and staging.

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

Sennheiser Momentum 4 Wireless — leads on anc (84 vs 0). ANC strength for commute and travel.