3.8Noise control & calls7.8
Why is HD 660S2 better than Aionic 50 Gen 2?
- Lowest frequency8 Hz vs 20 Hz2.5×
- Highest frequency41,500 Hz vs 22,000 Hz+89%
Why is Aionic 50 Gen 2 better than HD 660S2?
- Active noise cancellingNo · HD 660S2: Yes
Specifications
Side by side
| Sound | ||
| Fit | Over-ear | In-ear |
| Driver size | 38 mm | — |
| Lowest frequency | 8 Hz | 20 Hz |
| Highest frequency | 41,500 Hz | 22,000 Hz |
| Impedance | 300 Ω | — |
| Sensitivity | 104 dB | — |
| Adjustable equaliser | — | Yes |
| Noise control | ||
| Active noise cancelling | No | Yes |
| Transparency / ambient mode | — | Yes |
| Battery & charging | ||
| Battery life | — | 45 h |
| Connectivity | ||
| Wireless | No | Yes |
| Bluetooth version | — | 5.1 |
| USB-C | — | Yes |
| 3.5 mm jack / AUX | — | Yes |
| Design & build | ||
| Weight | 260 g | — |
| Colours | Black | Black |
| Features | ||
| Hands-free calls | — | Yes |
