vs
9.2Noise control & calls9.2
4.9Battery3.0
Why is QuietComfort Ultra (2nd Gen) better than PX7 S2?
- Charging time3 h vs 7 h2.3×
- Bluetooth version5.4 vs 5+8%
Why is PX7 S2 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
Specifications
Side by side
| Sound | ||
| Fit | Over-ear | Over-ear |
| Ear cup design | Closed-back | — |
| Driver type | Dynamic | — |
| Driver size | — | 43 mm |
| Number of drivers | — | 1 |
| Lowest frequency | — | 10 Hz |
| Highest frequency | — | 20,000 Hz |
| Impedance | — | 22 Ω |
| Spatial / 3D audio | Yes | — |
| Hi-Res Audio | — | Yes |
| Adjustable equaliser | Yes | — |
| Noise control | ||
| Active noise cancelling | Yes | Yes |
| Battery & charging | ||
| Battery life | 30 h | 30 h |
| Battery capacity | 850 mAh | — |
| Charging time | 3 h | 7 h |
| Quick charge (claimed) | 15 min → 2,5 h | — |
| Fast charging support | Yes | — |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5.4 | 5 |
| Bluetooth codecs | AAC, SBC | aptX HD, aptX, AAC, SBC |
| Hi-res codec (LDAC / aptX HD / LHDC) | No | Yes |
| aptX | No | Yes |
| LDAC | No | No |
| USB-C | Yes | — |
| 3.5 mm jack / AUX | Yes | Yes |
| Smart & streaming | ||
| Voice assistant | Siri | — |
| Companion app | Yes | Yes |
| Design & build | ||
| Weight | — | 335 g |
| Features | ||
| Hands-free calls | Yes | — |
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