Sennheiser HD 650 Open Back Headphones vs Sennheiser - HD 660S2 Open-Back Wired Headphone

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 650 Open Back Headphones Sennheiser Now ₹23,990 at Headphone Zone Lowest ever ₹23,882 on Tuesday, 13th Oct, 2026 ★★★★★ 4.9 4.9 · 79 reviews Full prices & history

Sennheiser - HD 660S2 Open-Back Wired Headphone Sennheiser Now ₹27,990 at Headphone Zone Lowest ever ₹27,990 on Wednesday, 7th Oct, 2026 ★★★★★ 4.8 4.8 · 34 reviews Full prices & history

Measured tuning, side by side

Both curves are real community measurements (gold: Sennheiser HD 650 Open Back Headphones · ink: Sennheiser - HD 660S2 Open-Back Wired Headphone). Each is level-aligned to its own 200 Hz–1 kHz mean, so rig offsets don't skew the comparison.

Sennheiser HD 650 Open Back Headphones Sennheiser - HD 660S2 Open-Back Wired Headphone

Tuning distance±1.65 dB RMS90% match - Very close. Computed on a shared 40-point log grid, 20 Hz–10 kHz. A measurement-space fact, not a promise two ears agree.

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.

The decision, factually

Cheaper right nowSennheiser HD 650 Open Back HeadphonesLowest current price across all tracked stores - ₹23,990 vs ₹27,990.

Deepest discount ever seenSennheiser HD 650 Open Back HeadphonesFrom each product's own recorded price history.

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