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7.8Noise control & calls3.8
Why is QuietComfort Ultra better than HD 620S?
- Active noise cancellingYes · HD 620S: No
Why is HD 620S better than QuietComfort Ultra?
HD 620S has no measurable advantages in this pair.
Specifications
Side by side
| Sound | ||
| Fit | On-ear | Over-ear |
| Ear cup design | Closed-back | — |
| Driver type | Dynamic | — |
| Driver size | — | 42 mm |
| Lowest frequency | — | 6 Hz |
| Highest frequency | — | 30,000 Hz |
| Impedance | — | 150 Ω |
| Sensitivity | — | 110 dB |
| Spatial / 3D audio | Yes | — |
| Adjustable equaliser | Yes | — |
| Noise control | ||
| Active noise cancelling | Yes | No |
| Transparency / ambient mode | Yes | — |
| Battery & charging | ||
| Battery life | 24 h | — |
| Charging time | 3 h | — |
| Quick charge (claimed) | 15 min → 2 h | — |
| Fast charging support | Yes | — |
| Connectivity | ||
| Wireless | Yes | No |
| Bluetooth version | 5.3 | — |
| Bluetooth codecs | AAC, SBC | — |
| Hi-res codec (LDAC / aptX HD / LHDC) | No | — |
| aptX | No | — |
| LDAC | No | — |
| Multipoint (two devices) | Yes | — |
| USB-C | Yes | — |
| 3.5 mm jack / AUX | — | Yes |
| Smart & streaming | ||
| Companion app | Yes | — |
| Design & build | ||
| Weight | 250 g | — |
| Colours | — | Black |
| Features | ||
| Touch controls | Yes | — |
| Hands-free calls | Yes | — |
