vs
5.5Noise control & calls5.6
5.1Battery3.7
Why is CMF Buds 2a better than A30i?
- Battery life8 h vs 7 h+14%
- Total with charging case36 h vs 24 h+48%
- Driver size12.4 mm vs 6 mm2.1×
Why is A30i better than CMF Buds 2a?
A30i has no measurable advantages in this pair.
Specifications
Side by side
| Sound | ||
| Fit | In-ear | In-ear |
| Driver type | — | Dynamic |
| Driver size | 12.4 mm | 6 mm |
| Lowest frequency | — | 20 Hz |
| Highest frequency | — | 20,000 Hz |
| Impedance | — | 24 Ω |
| Spatial / 3D audio | — | Yes |
| Adjustable equaliser | Yes | Yes |
| Noise control | ||
| Active noise cancelling | Yes | Yes |
| Adaptive ANC | Yes | — |
| Transparency / ambient mode | Yes | Yes |
| Microphones | — | 4 |
| Noise reduction for calls | Yes | Yes |
| Battery & charging | ||
| Battery life | 8 h | 7 h |
| Battery life with ANC | 5 h | — |
| Total with charging case | 36 h | 24 h |
| Charging time | — | 2 h |
| Fast charging support | Yes | — |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5.4 | 5.4 |
| Bluetooth codecs | AAC, SBC | AAC, SBC |
| Hi-res codec (LDAC / aptX HD / LHDC) | No | No |
| aptX | No | No |
| LDAC | No | No |
| Multipoint (two devices) | — | Yes |
| USB-C | — | Yes |
| Low-latency game mode | Yes | — |
| Smart & streaming | ||
| Companion app | — | Yes |
| Design & build | ||
| Earbud weight (each) | — | 3.7 g |
| Protection rating | IP54 | IP54 |
| Water resistance (IPx) | IPx4 | IPx4 |
| Dust protection (IP) | 5 | 5 |
| Colours | — | Black, White, Blue, Pink |
| Features | ||
| Touch controls | Yes | Yes |
| Hands-free calls | Yes | Yes |
