vs
4.0Battery4.9
Why is QuietComfort Ultra Earbuds better than Comfo C?
- Hi-res codec (LDAC / aptX HD / LHDC)Yes · Comfo C: No
- aptXYes · Comfo C: No
Why is Comfo C better than QuietComfort Ultra Earbuds?
- Battery life6 h vs 7 h+17%
- Water resistance (IPx)IPx4 vs IPx6+50%
- Total with charging case24 h vs 28 h+17%
Specifications
Side by side
| Sound | ||
| Fit | In-ear | Open-ear |
| Driver type | — | Dynamic |
| Driver size | — | 12 mm |
| Lowest frequency | — | 20 Hz |
| Highest frequency | — | 20,000 Hz |
| Sensitivity | — | 90 dB |
| Spatial / 3D audio | Yes | — |
| Hi-Res Audio | Yes | — |
| Adjustable equaliser | Yes | — |
| Noise control | ||
| Active noise cancelling | Yes | — |
| Transparency / ambient mode | Yes | — |
| Microphones | 8 | — |
| Battery & charging | ||
| Battery life | 6 h | 7 h |
| Total with charging case | 24 h | 28 h |
| Charging time | 1 h | 1 h |
| Quick charge (claimed) | 20 min → 2 h | — |
| Fast charging support | Yes | — |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5.3 | 5.4 |
| Bluetooth codecs | aptX Adaptive, SBC | AAC, SBC |
| Hi-res codec (LDAC / aptX HD / LHDC) | Yes | No |
| aptX | Yes | No |
| LDAC | No | No |
| Multipoint (two devices) | Yes | — |
| USB-C | Yes | Yes |
| Smart & streaming | ||
| Companion app | Yes | — |
| Design & build | ||
| Earbud weight (each) | 6.2 g | — |
| Protection rating | IPX4 | IP56 |
| Water resistance (IPx) | IPx4 | IPx6 |
| Dust protection (IP) | — | 5 |
| Features | ||
| Touch controls | Yes | — |
| Hands-free calls | Yes | — |
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