Why is HA-FR29UC better than 4XD1J77351?
- Lowest frequency10 Hz vs 100 Hz10×
- Driver size10 mm vs 9 mm+11%
Why is 4XD1J77351 better than HA-FR29UC?
4XD1J77351 has no measurable advantages in this pair.
Specifications
Side by side
| Sound | ||
| Fit | In-ear | In-ear |
| Ear cup design | Closed-back | — |
| Driver type | Dynamic | — |
| Driver size | 10 mm | 9 mm |
| Lowest frequency | 10 Hz | 100 Hz |
| Highest frequency | 20,000 Hz | 20,000 Hz |
| Impedance | — | 32 Ω |
| Hi-Res Audio | Yes | — |
| Battery & charging | ||
| Charging time | 2 h | — |
| Connectivity | ||
| Wireless | No | No |
| USB-C | Yes | Yes |
| Design & build | ||
| Weight | 4 g | — |
| Protection rating | IPX2 | — |
| Water resistance (IPx) | IPx2 | — |
| Colours | — | Black |
| Features | ||
| Hands-free calls | — | Yes |







