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9.2Noise control & calls9.2
Why is QuietComfort Ultra (2nd Gen) better than ALCHEM-E?
QuietComfort Ultra (2nd Gen) has no measurable advantages in this pair.
Why is ALCHEM-E better than QuietComfort Ultra (2nd Gen)?
- Battery life30 h vs 45 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 |
| Lowest frequency | — | 8 Hz |
| Highest frequency | — | 40,000 Hz |
| Spatial / 3D audio | Yes | — |
| Adjustable equaliser | Yes | Yes |
| Noise control | ||
| Active noise cancelling | Yes | Yes |
| Battery & charging | ||
| Battery life | 30 h | 45 h |
| Battery capacity | 850 mAh | — |
| Charging time | 3 h | — |
| Quick charge (claimed) | 15 min → 2,5 h | — |
| Fast charging support | Yes | — |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5.4 | 5.3 |
| Bluetooth codecs | AAC, SBC | — |
| Hi-res codec (LDAC / aptX HD / LHDC) | No | — |
| aptX | No | — |
| LDAC | No | — |
| USB-C | Yes | — |
| 3.5 mm jack / AUX | Yes | Yes |
| Smart & streaming | ||
| Voice assistant | Siri | — |
| Companion app | Yes | — |
| Features | ||
| Hands-free calls | Yes | — |
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