vs
3.8Noise control & calls7.8
Why is HD 660S2 better than AONIC 50 GEN 2?
- Lowest frequency8 Hz vs 20 Hz2.5×
- Weight260 g vs 334 g+28%
- Highest frequency41,500 Hz vs 22,000 Hz+89%
Why is AONIC 50 GEN 2 better than HD 660S2?
- Active noise cancellingNo · HD 660S2: Yes
- Driver size38 mm vs 50 mm+32%
Specifications
Side by side
| Sound | ||
| Fit | Over-ear | — |
| Ear cup design | — | Closed-back |
| Driver type | — | Dynamic |
| Driver size | 38 mm | 50 mm |
| Lowest frequency | 8 Hz | 20 Hz |
| Highest frequency | 41,500 Hz | 22,000 Hz |
| Impedance | 300 Ω | 39 Ω |
| Sensitivity | 104 dB | 98 dB |
| Hi-Res Audio | — | Yes |
| 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 codecs | — | LDAC, aptX Adaptive, aptX HD, aptX, AAC, SBC |
| Hi-res codec (LDAC / aptX HD / LHDC) | — | Yes |
| aptX | — | Yes |
| LDAC | — | Yes |
| Multipoint (two devices) | — | Yes |
| USB-C | — | Yes |
| 3.5 mm jack / AUX | — | Yes |
| Design & build | ||
| Weight | 260 g | 334 g |
| Foldable | — | Yes |
| Colours | Black | — |
| Features | ||
| Hands-free calls | — | Yes |
