Sennheiser HD 660S2 vs Sennheiser Momentum 4

Every tracked fact about the two, side by side - prices, history lows, ratings and measured tuning. No verdict: which one to buy is the visitor's decision, always.

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Open head-to-head

Sennheiser HD 660S2 Dynamic Open-back Headphones Sennheiser Now ₹27,990 at Headphone Zone Lowest on record ₹680 on Thursday, 5th Nov, 2026 ★★★★★ 4.8 4.8 · 34 reviews Full prices & history

Sennheiser Momentum 4 Wireless Headphones - Clearance / Open Box - Black Sennheiser Now ₹27,990 at The Revolver Club Lowest on record ₹23,720 on Wednesday, 4th Nov, 2026 Full prices & history

What is being compared

Both sides are headphones. The rows below are the facts each store publishes for this shelf - driver setup, impedance, sensitivity, back design and connectivity. A dash means the listing does not state that spec.

Spec Sennheiser HD 660S2 Sennheiser Momentum 4

Driver configuration Dynamic (DD) —

Impedance 300Ω —

Connectivity Wired Wireless

Back design Open-back —

Plug 4.4mm balanced —

Measured tuning, side by side

Both curves are real community measurements (gold: Sennheiser HD 660S2 · blue: Sennheiser Momentum 4). Each is level-aligned to its own 200 Hz–1 kHz mean, so rig offsets don't skew the comparison.

Sennheiser HD 660S2 Sennheiser Momentum 4

Average level per band, relative to that curve's own 200 Hz–1 kHz middle - a taller bar plays louder there on the measured files. Same colours as the chart above.

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Hear them side by side

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Your earphones / headphones

Wearing your own earphones or headphones? Pick them here and the player pre-corrects for their sound, so the demo plays the target tuning itself - not both mixed together.

Same signal through both tunings at once - slide to blend. Start on pink noise for the clearest read.

Tuning distance ±5.21 dB RMS 69% match - Close. Computed on a shared 40-point log grid, 20 Hz–10 kHz. A measurement-space fact, not a promise two ears agree.

Bass · 20–250 Hz Sennheiser HD 660S2 −4.0 dB Average level difference in this band, both curves aligned to their own 200 Hz–1 kHz mean. Plus means Sennheiser HD 660S2 plays louder there on the measured files; minus means Sennheiser Momentum 4 does.

Mids · 250–2,000 Hz Sennheiser HD 660S2 −2.4 dB Average level difference in this band, both curves aligned to their own 200 Hz–1 kHz mean. Plus means Sennheiser HD 660S2 plays louder there on the measured files; minus means Sennheiser Momentum 4 does.

Treble · 2,000–10,000 Hz Sennheiser HD 660S2 −1.3 dB Average level difference in this band, both curves aligned to their own 200 Hz–1 kHz mean. Plus means Sennheiser HD 660S2 plays louder there on the measured files; minus means Sennheiser Momentum 4 does.

What a curve cannot seeBuild, driver QC unit-to-unit, comfort, isolation, accessories, warranty and resale value sit outside the graph - usually what the pricier one is charging for.

Price over the last 30 days

Daily lowest price across every tracked store, from the site's own price history. The line is one product's own range - the two cards are not drawn to a shared scale.

Sennheiser HD 660S2 Dynamic Open-back Headphones Now ₹27,990 at its 30-day median Lowest on record ₹680 on Thursday, 5th Nov, 2026 In stock at 7 tracked stores

Sennheiser Momentum 4 Wireless Headphones - Clearance / Open Box - Black Now ₹27,990 at its 30-day median Lowest on record ₹23,720 on Wednesday, 4th Nov, 2026 In stock at 1 tracked store

Price gap right now Tied Both sides need a tracked offer to compare.

Stores with it in stock 7 vs 1 Active stores carrying each one right now - more stores usually means easier replacement and a steadier price.

The decision, factually

Cheaper right now Tied Lowest current price across all tracked stores.

Deepest discount ever seen Sennheiser HD 660S2 Dynamic Open-back Headphones From each product's own recorded price history.

This page reports facts and expresses no opinion on which to purchase.

Keep going

EQ preset: Sennheiser HD 660S2 EQ preset: Sennheiser Momentum 4 All Headphones More comparisons