Sennheiser - HD 660S2 vs Sonos Ace Wireless

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.

Sennheiser - HD 660S2 Open-Back Wired Headphone Sennheiser Now ₹27,990 at Headphone Zone At its lowest recorded price ★★★★★ 4.8 4.8 · 34 reviews Full prices & history

Sonos Ace Wireless Noise-Canceling Over-Ear Headphones - Black Sonos Now ₹27,999 at AVStore At its lowest recorded price ★★★★★ 4.8 4.8 · 470 reviews 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 Sonos

Impedance 300Ω —

Connectivity Wired Wireless

Form factor — Over-ear

Back design Open-back —

Active noise cancelling — ANC / noise cancelling

Measured tuning, side by side

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

Sennheiser Sonos

Tuning distance ±5.79 dB RMS 65% 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 −6.9 dB Average level difference in this band, both curves aligned to their own 200 Hz–1 kHz mean. Plus means Sennheiser plays louder there on the measured files; minus means Sonos does.

Mids · 250–2,000 Hz Sennheiser +0.6 dB Average level difference in this band, both curves aligned to their own 200 Hz–1 kHz mean. Plus means Sennheiser plays louder there on the measured files; minus means Sonos does.

Treble · 2,000–10,000 Hz Sennheiser −3.9 dB Average level difference in this band, both curves aligned to their own 200 Hz–1 kHz mean. Plus means Sennheiser plays louder there on the measured files; minus means Sonos 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 Open-Back Wired Headphone Now ₹27,990 at its 30-day median Lowest on record ₹27,990 on Wednesday, 7th Oct, 2026 In stock at 7 tracked stores

Sonos Ace Wireless Noise-Canceling Over-Ear Headphones - Black Now ₹27,999 at its 30-day median Lowest on record ₹27,999 on Thursday, 8th Oct, 2026 In stock at 2 tracked stores

Price gap right now ₹9 0% of the dearer one's price.

Stores with it in stock 7 vs 2 Active stores carrying each one right now - more stores usually means easier replacement and a steadier price.

The decision, factually

Cheaper right now Sennheiser - HD 660S2 Open-Back Wired Headphone Lowest current price across all tracked stores - ₹27,990 vs ₹27,999.

Deepest discount ever seen Sennheiser - HD 660S2 Open-Back Wired Headphone 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 EQ preset: Sonos All Headphones More comparisons