vs
8.8Noise control & calls9.3
4.2Battery7.1
3.4Build & features6.8
Why is QuietComfort Ultra Earbuds better than Sleep A30?
- Hi-res codec (LDAC / aptX HD / LHDC)Yes · Sleep A30: No
- aptXYes · Sleep A30: No
- Charging time1 h vs 1.5 h+50%
Why is Sleep A30 better than QuietComfort Ultra Earbuds?
- Battery life6 h vs 9 h+50%
- Total with charging case24 h vs 45 h+88%
- Earbud weight (each)6.2 g vs 3 g2.1×
Specifications
Side by side
| Sound | ||
| Fit | In-ear | In-ear |
| Ear cup design | — | Closed-back |
| Driver type | — | Dynamic |
| Driver size | — | 4.6 mm |
| Lowest frequency | — | 20 Hz |
| Highest frequency | — | 20,000 Hz |
| Impedance | — | 14 Ω |
| Spatial / 3D audio | Yes | — |
| Hi-Res Audio | Yes | — |
| Adjustable equaliser | Yes | — |
| Noise control | ||
| Active noise cancelling | Yes | Yes |
| Transparency / ambient mode | Yes | — |
| Microphones | 8 | — |
| Battery & charging | ||
| Battery life | 6 h | 9 h |
| Battery life with ANC | — | 6 h |
| Total with charging case | 24 h | 45 h |
| Charging time | 1 h | 1.5 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 | Yes |
| Design & build | ||
| Earbud weight (each) | 6.2 g | 3 g |
| Protection rating | IPX4 | IPX4 |
| Water resistance (IPx) | IPx4 | IPx4 |
| Colours | — | Mist Lilac Special, Lunar White Special, Moonlit White, Mist Green |
| Features | ||
| Touch controls | Yes | Yes |
| Hands-free calls | Yes | Yes |
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