vs
2.5Battery4.8
6.1Build & features4.8
Why is FreeBuds 4 better than EAH-AZ40?
- Driver size14.3 mm vs 6 mm2.4×
- Highest frequency40,000 Hz vs 20,000 Hz2×
- Charging time1 h vs 2 h2×
- Earbud weight (each)4.1 g vs 5 g+22%
Why is EAH-AZ40 better than FreeBuds 4?
- Battery life4 h vs 7.5 h+88%
Specifications
Side by side
| Sound | ||
| Fit | Semi-in-ear (open) | In-ear |
| Ear cup design | Open-back | Closed-back |
| Driver type | Dynamic | Dynamic |
| Driver size | 14.3 mm | 6 mm |
| Lowest frequency | 20 Hz | 20 Hz |
| Highest frequency | 40,000 Hz | 20,000 Hz |
| Adjustable equaliser | Yes | Yes |
| Noise control | ||
| Active noise cancelling | Yes | — |
| Transparency / ambient mode | — | Yes |
| Battery & charging | ||
| Battery life | 4 h | 7.5 h |
| Battery life with ANC | 2.5 h | — |
| Charging time | 1 h | 2 h |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5.2 | 5.2 |
| 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 | Yes |
| USB-C | Yes | Yes |
| Design & build | ||
| Earbud weight (each) | 4.1 g | 5 g |
| Protection rating | IPX4 | IPX4 |
| Water resistance (IPx) | IPx4 | IPx4 |
| Features | ||
| Touch controls | — | Yes |
| Hands-free calls | Yes | Yes |
