Why is C40i better than A3 Pro?
- Driver size12 mm vs 10 mm+20%
Why is A3 Pro better than C40i?
- Active noise cancellingNo · C40i: Yes
Specifications
Side by side
| Sound | ||
| Fit | In-ear | In-ear |
| Ear cup design | Open-back | — |
| Driver type | Dynamic | Dynamic |
| Driver size | 12 mm | 10 mm |
| Number of drivers | 1 | — |
| Lowest frequency | 20 Hz | 20 Hz |
| Highest frequency | 20,000 Hz | 20,000 Hz |
| Impedance | 22 Ω | 32 Ω |
| Sensitivity | — | 107 dB |
| Hi-Res Audio | Yes | — |
| Adjustable equaliser | Yes | — |
| Noise control | ||
| Active noise cancelling | No | Yes |
| Battery & charging | ||
| Battery life | 7 h | — |
| Total with charging case | 21 h | — |
| Charging time | 1 h | — |
| Quick charge (claimed) | 10 min → 5 h | — |
| Fast charging support | Yes | — |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5.4 | 5.4 |
| Bluetooth codecs | AAC, SBC | SBC |
| Hi-res codec (LDAC / aptX HD / LHDC) | No | No |
| aptX | No | No |
| LDAC | No | No |
| Multipoint (two devices) | Yes | Yes |
| USB-C | Yes | Yes |
| Design & build | ||
| Weight | — | 38 g |
| Earbud weight (each) | 5.8 g | — |
| Protection rating | IPX4 | — |
| Water resistance (IPx) | IPx4 | — |
| Colours | Midnight Black, Desert Bronze | — |
| Features | ||
| Touch controls | Yes | Yes |
| Hands-free calls | Yes | Yes |
