Sennheiser HD 650 Stereo Reference Headphones vs Sennheiser HD 660S2 Headphones - Open Box

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

Sennheiser HD 660S2 Headphones - Open Box sennheiser Out of stock at every tracked store ★★★★★ 4.5 4.5 · 2 reviews Full prices & history

Measured tuning, side by side

Both curves are real community measurements (gold: Sennheiser HD 650 Stereo Reference Headphones · ink: Sennheiser HD 660S2 Headphones - Open Box). 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 Sennheiser HD 660S2 Headphones - Open Box

Tuning distance ±1.65 dB RMS 90% 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 now Sennheiser HD 650 Stereo Reference Headphones Lowest current price across all tracked stores.

Deepest discount ever seen Sennheiser HD 650 Stereo Reference Headphones From each product's own recorded price history.

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