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1 / 6Sennheiser
Sennheiser HD 620S
Noise Isolation / ANC & sound
6.5/ 10
6.5
0.010.0
A 6.5 puts its noise isolation / ANC in the top half of over-ear headphones we've measured.
Measured on 86 of the 240 we've cataloged.
2.9/ 5
SoundMDAQS Overall2.9
1.05.0
A 2.9 puts its audio quality in the bottom 10% of over-ear headphones we've measured.
Measured on 44 of the 240 we've cataloged.
Key specs
Connection Type
Wired 3.5mmMost commonWired-3.5mm48%Bluetooth44%Wired-usb-c7%Others1%
Wired-3.5mm is the most common — on 48% of the 215 over-ear headphones we've cataloged (of 240).
Weight
326 gAbove average350 g
132 g420 g
above average for over-ear headphones — based on 195 of 240 we've cataloged.
Connectivity
- Connection Type
- Wired 3.5mm
- Headphone Jack
- Yes
- USB Charging
- No
Design
- Weight
- 326 g
- Color Options
- Black
- Ear Pad Inner Dimensions
- 70×50 mm
- Ear Pad Type
- Artificial leather
- Foldable
- No
- Headband Type
- Fixed over-head
Build
- IP Rating
- IPX0
- Material Ear Cups
- Artificial leather
Sound
- Acoustic Design
- Closed-back
- Driver Count
- 1
- Driver Size
- 42 mm
- Driver Type
- Dynamic driver
- Frequency Response
- 6-30000 Hz
- Frequency Response High Hz
- 30000 Hz
- Frequency Response Low Hz
- 6 Hz
- Impedance
- 150 Ω
- Max Spl
- 105 dB SPL
- Sensitivity
- 110 dB/mW
Battery
- Battery
- No
Identity
- Model Number
- HD 620S
Microphone
- Microphone
- No
Release
- Date
- 2024-06
- Msrp Usd
- 350 USD
- Year
- 2024
SoundGuys review
Read the full review ›Isolation6.5
Comfort & fit9.0
Connectivity6.9
Design8.0
Portability4.9
Features6.0
The verdict
Though the Sennheiser HD 620S has a bit of an odd sound, you won't find more comfortable
✓What we like
✓Comfort
✓Easy to power
✓Removable cable
✓Included adapter
✕What could be better
✕Weird default sound
✕Price
Lab data
How we test ›Objective measurements from the SoundGuys test lab — overlay other models to see how this one compares.
Sennheiser HD 620SSoundGuys Headphone Preference Curve
Measured frequency response (dB) against the SoundGuys house target — the dashed curve. The closer the measured line tracks the target, the more neutral the tuning; peaks ride above the target, dips fall below it.
Frequency response — measurement data
| Frequency (Hz) | Response (dB) |
|---|---|
| 20 | -1.2 |
| 25 | -0.4 |
| 32 | -0.1 |
| 40 | -0.1 |
| 50 | 0.9 |
| 63 | 0.7 |
| 80 | 2.0 |
| 100 | 3.6 |
| 125 | 3.5 |
| 160 | -0.0 |
| 200 | -3.5 |
| 250 | -4.0 |
| 315 | -2.3 |
| 400 | -0.1 |
| 500 | 1.2 |
| 630 | 1.6 |
| 800 | 0.6 |
| 1000 | -0.0 |
| 1250 | 0.3 |
| 1600 | 1.1 |
| 2000 | 4.1 |
| 2500 | 9.4 |
| 3150 | 10.5 |
| 4000 | 6.2 |
| 5000 | 4.5 |
| 6300 | 5.6 |
| 8000 | 9.6 |
| 10000 | 3.4 |
| 12500 | 1.1 |
| 16000 | -8.3 |
| 20000 | -3.6 |
Sennheiser HD 620S
Passive isolation (dB) with ANC off — how much ambient noise the fit blocks on its own. Higher on the chart means more attenuation.
Passive isolation — measurement data
| 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
2.5
3.8
4.1
2.9
Multi-Dimensional Audio Quality Scores (1–5), modeled from the measured response. Higher is better across timbre, distortion, and immersiveness — add other models to see where this one lands.
Features & Opinions
More from the team ›Commentary and deep dives from the SoundGuys editorial team.
I've reviewed headphones for over a decade: Here are 5 things I wish they did differentlyHeadphone companies: help me help you
Christian ThomasEditor-at-large5 ways headphones are going to change in 2027Here's where things are headed.Christian ThomasEditor-at-largeWired vs wireless headphones: Which should you buy?Wired headphones do not automatically sound better.
Tom TriggsContributor
Christian ThomasEditor-at-large5 ways headphones are going to change in 2027Here's where things are headed.Christian ThomasEditor-at-largeWired vs wireless headphones: Which should you buy?Wired headphones do not automatically sound better.Tom TriggsContributorMore Over-Ear Headphones
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