Sennheiser HD 660 S - vs STAX SR-L500 MK2

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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vs

Open head-to-head

Sennheiser HD 660 S - Dynamic Open-Back Stereo Headphone Sennheiser Now ₹39,990 at AVStore Lowest on record ₹33,718 on Sunday, 4th Oct, 2026 ★★★★★ 4.8 4.8 · 470 reviews Full prices & history

STAX SR-L500 MK2 Earspeakers stax Now ₹78,535 at Apos Lowest on record ₹830 on Thursday, 5th 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 stax

Driver configuration Dynamic (DD) —

Impedance 150Ω —

Sensitivity — 101dB

Connectivity Wired Wired

Back design Open-back —

Measured tuning, side by side

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

Sennheiser stax

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

Signal A B

Hear A Hear B

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 ±2.36 dB RMS 86% 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.

Bass · 20–250 Hz Sennheiser −1.0 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 stax does.

Mids · 250–2,000 Hz Sennheiser −1.0 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 stax does.

Treble · 2,000–10,000 Hz Sennheiser −0.9 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 stax 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 660 S - Dynamic Open-Back Stereo Headphone Now ₹39,990 at its 30-day median Lowest on record ₹33,718 on Sunday, 4th Oct, 2026 In stock at 1 tracked store

STAX SR-L500 MK2 Earspeakers Now ₹78,535 at its 30-day median Lowest on record ₹830 on Thursday, 5th Nov, 2026 In stock at 1 tracked store

Price gap right now ₹38,545 49% of the dearer one's price.

Stores with it in stock 1 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 Sennheiser HD 660 S - Dynamic Open-Back Stereo Headphone Lowest current price across all tracked stores - ₹39,990 vs ₹78,535.

Deepest discount ever seen STAX SR-L500 MK2 Earspeakers 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: stax All Headphones More comparisons