vs
9.3Battery9.7
8.5Build & features6.8
Why is Liberty Buds 2 better than Sleep A20?
- Hi-res codec (LDAC / aptX HD / LHDC)Yes · Sleep A20: No
- Water resistance (IPx)IPx5 vs IPx4+25%
- Highest frequency40,000 Hz vs 20,000 Hz2×
- LDACYes · Sleep A20: No
- Bluetooth version6.1 vs 5.3+15%
- Charging time1 h vs 1.5 h+50%
Why is Sleep A20 better than Liberty Buds 2?
- Battery life12 h vs 14 h+17%
- Earbud weight (each)4.7 g vs 3 g+57%
Specifications
Side by side
| Sound | ||
| Fit | In-ear | In-ear |
| Driver type | Dynamic | — |
| Driver size | 9.2 mm | — |
| Lowest frequency | 20 Hz | 20 Hz |
| Highest frequency | 40,000 Hz | 20,000 Hz |
| Impedance | 16 Ω | 16 Ω |
| Spatial / 3D audio | Yes | — |
| Hi-Res Audio | Yes | — |
| Adjustable equaliser | Yes | Yes |
| Noise control | ||
| Active noise cancelling | Yes | — |
| Transparency / ambient mode | Yes | — |
| Battery & charging | ||
| Battery life | 12 h | 14 h |
| Total with charging case | — | 80 h |
| Charging time | 1 h | 1.5 h |
| Wireless charging (case) | Yes | — |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 6.1 | 5.3 |
| Bluetooth codecs | LDAC, AAC, SBC | AAC, SBC |
| Hi-res codec (LDAC / aptX HD / LHDC) | Yes | No |
| aptX | No | No |
| LDAC | Yes | No |
| Multipoint (two devices) | Yes | — |
| USB-C | Yes | Yes |
| Design & build | ||
| Earbud weight (each) | 4.7 g | 3 g |
| Protection rating | IP55 | IPX4 |
| Water resistance (IPx) | IPx5 | IPx4 |
| Dust protection (IP) | 5 | — |
| Features | ||
| Touch controls | Yes | Yes |
| Hands-free calls | Yes | — |
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