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1 / 6A 6.5 puts its noise isolation in the top half of over-ear headphones we've measured.
Measured on 92 of the 242 we've cataloged.
A 2.9 puts its audio quality in the bottom 10% of over-ear headphones we've measured.
Measured on 48 of the 242 we've cataloged.
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Wired-3.5mm is the most common — on 47% of the 252 over-ear headphones we've cataloged (of 242).
above average for over-ear headphones — based on 200 of 242 we've cataloged.
Objective measurements from the SoundGuys test lab — overlay other models to see how this one compares.
Sennheiser HD 620S Frequency Response (measured on a B&K 5128)
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Measured frequency response (dB relative) against the SoundGuys Headphone Preference Curve. When the measurement goes above the dashed line, that frequency is louder than our preference curve, and when it goes below: it's quieter. Use the curve for comparison purposes only, as your taste may vary.
| Frequency (Hz) | Response (dB) |
|---|---|
| 20 | -1.8 |
| 25 | -1.0 |
| 32 | -0.8 |
| 40 | -0.8 |
| 50 | 0.3 |
| 63 | 0.1 |
| 80 | 1.4 |
| 100 | 3.0 |
| 125 | 2.9 |
| 160 | -0.7 |
| 200 | -4.2 |
| 250 | -4.7 |
| 315 | -3.0 |
| 400 | -0.8 |
| 500 | 0.5 |
| 630 | 1.0 |
| 800 | -0.1 |
| 1000 | -0.7 |
| 1250 | -0.3 |
| 1600 | 0.5 |
| 2000 | 3.5 |
| 2500 | 8.7 |
| 3150 | 9.8 |
| 4000 | 5.5 |
| 5000 | 3.9 |
| 6300 | 4.9 |
| 8000 | 9.0 |
| 10000 | 2.7 |
| 12500 | 0.5 |
| 16000 | -9.0 |
| 20000 | -4.3 |
Sennheiser HD 620S Attenuation (measured on a B&K 5128)
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Solid lines: passive isolation (dB) with ANC off — how much ambient noise the fit blocks on its own. Higher on the chart means more attenuation.
| Frequency (Hz) | Attenuation (dB) |
|---|---|
| 21 | -3.8 |
| 26 | 2.3 |
| 33 | 0.1 |
| 41 | 0.0 |
| 52 | -0.2 |
| 65 | -0.7 |
| 82 | -1.8 |
| 103 | -2.4 |
| 130 | -1.5 |
| 163 | 1.3 |
| 205 | 4.8 |
| 259 | 6.6 |
| 325 | 8.8 |
| 410 | 7.8 |
| 516 | 10.2 |
| 613 | 13.6 |
| 772 | 14.3 |
| 972 | 18.2 |
| 1220 | 20.2 |
| 1540 | 19.3 |
| 1940 | 25.1 |
| 2440 | 31.1 |
| 3070 | 23.9 |
| 3870 | 41.5 |
| 4870 | 39.1 |
| 6130 | 32.9 |
| 7720 | 39.2 |
| 9720 | 30.3 |
| 12200 | 23.5 |
| 15400 | 24.2 |
| 19400 | 26.9 |
Sennheiser HD 620S MDAQS
Multi-Dimensional Audio Quality Scores, Scale 1 - 5
Virtual mean opinion scores (MOS) on a 1–5 scale, modeled from the measured response by HEAD acoustics’ MDAQS (Multi-Dimensional Audio Quality Score) model. Higher is better across timbre, distortion, and immersiveness — add other models to see where this one lands.
The verdict
Though the Sennheiser HD 620S has a bit of an odd sound, you won't find more comfortable
✓Liked: Comfort, Easy to power, Removable cable, Included adapter
✕Could be better: Weird default sound, Price
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What readers ask about the Sennheiser HD 620S, answered by the people who own it.
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2 of 4 would buy again
4 owners · owners report ~40 h per charge vs 40 h claimed
Expected more from the fit and build
The battery beat their expectations
The noise cancelling beat their expectations
1 of 1 would buy again
1 owner
Nothing surprising about comfort
0 of 1 would buy again
1 owner
The noise cancelling beat their expectations
0 of 1 would buy again
1 owner · 1 photo-verified
Expected more from comfort
0 of 1 would buy again
1 owner
Comfort beat their expectations
0 of 2 would buy again
2 owners · 2 photo-verified
The noise cancelling beat their expectations
The battery beat their expectations