Why is HA-NP40T better than 4XD1J77351?
- Lowest frequency20 Hz vs 100 Hz5×
- Driver size16 mm vs 9 mm+78%
Why is 4XD1J77351 better than HA-NP40T?
4XD1J77351 has no measurable advantages in this pair.
Specifications
Side by side
| Sound | ||
| Fit | Bone conduction | In-ear |
| Ear cup design | Open-back | — |
| Driver type | Dynamic | — |
| Driver size | 16 mm | 9 mm |
| Number of drivers | 1 | — |
| Lowest frequency | 20 Hz | 100 Hz |
| Highest frequency | 20,000 Hz | 20,000 Hz |
| Impedance | — | 32 Ω |
| Battery & charging | ||
| Battery life | 7 h | — |
| Charging time | 2 h | — |
| Connectivity | ||
| Wireless | Yes | No |
| Bluetooth version | 5.4 | — |
| Bluetooth codecs | AAC, SBC | — |
| Hi-res codec (LDAC / aptX HD / LHDC) | No | — |
| aptX | No | — |
| LDAC | No | — |
| USB-C | — | Yes |
| Design & build | ||
| Protection rating | IPX4 | — |
| Water resistance (IPx) | IPx4 | — |
| Colours | — | Black |
| Features | ||
| Touch controls | Yes | — |
| Hands-free calls | Yes | Yes |
