Why is ATH-CK1TW better than KH-CRZ40T?
- Highest frequency25,000 Hz vs 20,000 Hz+25%
Why is KH-CRZ40T better than ATH-CK1TW?
- Battery life7 h vs 7.5 h+7%
- Charging time3 h vs 2 h+50%
- Earbud weight (each)6 g vs 4.1 g+46%
- Driver size4.9 mm vs 6 mm+22%
Specifications
Side by side
| Sound | ||
| Fit | In-ear | In-ear |
| Ear cup design | — | Closed-back |
| Driver type | Dynamic | — |
| Driver size | 4.9 mm | 6 mm |
| Lowest frequency | 20 Hz | 20 Hz |
| Highest frequency | 25,000 Hz | 20,000 Hz |
| Impedance | 16 Ω | — |
| Sensitivity | 98 dB | — |
| Battery & charging | ||
| Battery life | 7 h | 7.5 h |
| Charging time | 3 h | 2 h |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5.1 | 5.1 |
| Bluetooth codecs | SBC | SBC |
| Hi-res codec (LDAC / aptX HD / LHDC) | No | No |
| aptX | No | No |
| LDAC | No | No |
| USB-C | Yes | — |
| Design & build | ||
| Earbud weight (each) | 6 g | 4.1 g |
| Protection rating | IPX5 | IPX5 |
| Water resistance (IPx) | IPx5 | IPx5 |
| Features | ||
| Touch controls | — | Yes |
| Hands-free calls | Yes | Yes |
