vs
9.2Noise control & calls7.8
4.9Battery4.6
Why is QuietComfort Ultra (2nd Gen) better than ACE?
QuietComfort Ultra (2nd Gen) has no measurable advantages in this pair.
Why is ACE 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
- Battery capacity850 mAh vs 1,060 mAh+25%
Specifications
Side by side
| Sound | ||
| Fit | Over-ear | — |
| Ear cup design | Closed-back | Closed-back |
| Driver type | Dynamic | Dynamic |
| Driver size | — | 40 mm |
| Impedance | — | 24 Ω |
| Spatial / 3D audio | Yes | Yes |
| Head tracking | — | Yes |
| Adjustable equaliser | Yes | Yes |
| Noise control | ||
| Active noise cancelling | Yes | Yes |
| Transparency / ambient mode | — | Yes |
| Battery & charging | ||
| Battery life | 30 h | 30 h |
| Battery life with ANC | — | 30 h |
| Battery capacity | 850 mAh | 1,060 mAh |
| Charging time | 3 h | 3 h |
| Quick charge (claimed) | 15 min → 2,5 h | 3 min → 3 h |
| Fast charging support | Yes | Yes |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5.4 | 5.4 |
| Bluetooth codecs | AAC, SBC | aptX Lossless |
| 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 | Yes |
| Design & build | ||
| Weight | — | 312 g |
| Foldable | — | Yes |
| Features | ||
| Touch controls | — | Yes |
| Hands-free calls | Yes | Yes |
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