vs
4.3Battery4.8
Why is ATH-CKS30TW better than Free 2S?
- Battery life7.5 h vs 7 h+7%
Why is Free 2S better than ATH-CKS30TW?
- Water resistance (IPx)IPx5 vs IPx7+40%
- Charging time2.5 h vs 1.5 h+67%
Specifications
Side by side
| Sound | ||
| Fit | In-ear | In-ear |
| Driver type | Dynamic | — |
| Driver size | 9 mm | — |
| Lowest frequency | 5 Hz | — |
| Highest frequency | 20,000 Hz | — |
| Impedance | 20 Ω | — |
| Sensitivity | 110 dB | — |
| Spatial / 3D audio | — | Yes |
| Adjustable equaliser | Yes | — |
| Noise control | ||
| Transparency / ambient mode | Yes | — |
| Microphones | — | 4 |
| Noise reduction for calls | — | Yes |
| Battery & charging | ||
| Battery life | 7.5 h | 7 h |
| Total with charging case | — | 30 h |
| Battery capacity | — | 40 mAh |
| Charging time | 2.5 h | 1.5 h |
| Wireless charging (case) | — | Yes |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5.1 | 5.2 |
| Bluetooth codecs | AAC, SBC | SBC |
| Hi-res codec (LDAC / aptX HD / LHDC) | No | No |
| aptX | No | No |
| LDAC | No | No |
| Multipoint (two devices) | Yes | — |
| USB-C | Yes | Yes |
| Latency | — | 60 ms |
| Low-latency game mode | — | Yes |
| Design & build | ||
| Earbud weight (each) | 4.5 g | — |
| Protection rating | IP55 | IPX7 |
| Water resistance (IPx) | IPx5 | IPx7 |
| Dust protection (IP) | 5 | — |
| Features | ||
| Touch controls | Yes | — |
| Hands-free calls | Yes | — |
