vs
9.2Noise control & calls6.4
4.9Battery4.4
Why is QuietComfort Ultra (2nd Gen) better than PX8?
- Bluetooth version5.4 vs 5.2+4%
Why is PX8 better than QuietComfort Ultra (2nd Gen)?
- Hi-res codec (LDAC / aptX HD / LHDC)No · QuietComfort Ultra (2nd Gen): Yes
- aptXNo · QuietComfort Ultra (2nd Gen): Yes
- Charging time3 h vs 2 h+50%
Specifications
Side by side
| Sound | ||
| Fit | Over-ear | Over-ear |
| Ear cup design | Closed-back | Closed-back |
| Driver type | Dynamic | Dynamic |
| Driver size | — | 40 mm |
| Impedance | — | 33 Ω |
| Spatial / 3D audio | Yes | — |
| Hi-Res Audio | — | Yes |
| Adjustable equaliser | Yes | Yes |
| Noise control | ||
| Active noise cancelling | Yes | Yes |
| Adaptive ANC | — | Yes |
| Transparency / ambient mode | — | Yes |
| Battery & charging | ||
| Battery life | 30 h | 30 h |
| Battery life with ANC | — | 30 h |
| Battery capacity | 850 mAh | — |
| Charging time | 3 h | 2 h |
| Quick charge (claimed) | 15 min → 2,5 h | — |
| Fast charging support | Yes | Yes |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5.4 | 5.2 |
| Bluetooth codecs | AAC, SBC | aptX Adaptive, aptX HD, AAC, SBC |
| Hi-res codec (LDAC / aptX HD / LHDC) | No | Yes |
| aptX | No | Yes |
| LDAC | No | No |
| Multipoint (two devices) | — | Yes |
| USB-C | Yes | Yes |
| 3.5 mm jack / AUX | Yes | Yes |
| Smart & streaming | ||
| Voice assistant | Siri | — |
| Companion app | Yes | — |
| Design & build | ||
| Foldable | — | Yes |
| Features | ||
| Hands-free calls | Yes | Yes |
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