Sennheiser HD 650 Stereo Reference Headphones vs HD 660S2 Headphones

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 Stereo Reference Headphones Sennheiser Now ₹24,990 at AVStore Lowest ever ₹24,990 on Saturday, 12th Sept, 2026 ★★★★★ 4.8 4.8 · 470 reviews Full prices & history

HD 660S2 Headphones Sennheiser Now ₹65,928 at Moon Audio Lowest ever ₹31,584 on Thursday, 1st Oct, 2026 ★★★★★ 4.7 4.7 · 3 reviews Full prices & history

Measured tuning, side by side

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

Sennheiser HD 650 Stereo Reference Headphones HD 660S2 Headphones

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 Stereo Reference HeadphonesLowest current price across all tracked stores - ₹24,990 vs ₹65,928.

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

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