Why is K1 better than REWIND 2?
- Driver size40 mm vs 36 mm+11%
Why is REWIND 2 better than K1?
REWIND 2 has no measurable advantages in this pair.
Specifications
Side by side
| Sound | ||
| Fit | Over-ear | Over-ear |
| Ear cup design | Closed-back | — |
| Driver type | Dynamic | Dynamic |
| Driver size | 40 mm | 36 mm |
| Number of drivers | 1 | — |
| Lowest frequency | — | 20 Hz |
| Highest frequency | — | 20,000 Hz |
| Impedance | 32 Ω | 32 Ω |
| Sensitivity | 94 dB | 106 dB |
| Adjustable equaliser | — | Yes |
| Noise control | ||
| Active noise cancelling | No | — |
| Microphones | — | 1 |
| Noise reduction for calls | — | Yes |
| Battery & charging | ||
| Battery life | — | 20 h |
| Battery capacity | — | 220 mAh |
| Charging time | — | 2 h |
| Quick charge (claimed) | — | 10 min → 3 h |
| Fast charging support | — | Yes |
| Connectivity | ||
| Wireless | No | Yes |
| Bluetooth version | — | 5 |
| Bluetooth codecs | — | SBC |
| Hi-res codec (LDAC / aptX HD / LHDC) | — | No |
| aptX | — | No |
| LDAC | — | No |
| Multipoint (two devices) | — | Yes |
| USB-C | — | Yes |
| 3.5 mm jack / AUX | Yes | — |
| Latency | — | 200 ms |
| Low-latency game mode | — | Yes |
| Smart & streaming | ||
| Companion app | — | Yes |
| Design & build | ||
| Weight | — | 57 g |
| Features | ||
| Hands-free calls | Yes | Yes |
