vs
4.0Noise control & calls4.0
Why is ATH-M20xBT better than HE-R9?
- Weight216 g vs 460 g2.1×
- Lowest frequency5 Hz vs 15 Hz3×
Why is HE-R9 better than ATH-M20xBT?
- Highest frequency32,000 Hz vs 35,000 Hz+9%
Specifications
Side by side
| Sound | ||
| Fit | Over-ear | Over-ear |
| Ear cup design | Closed-back | — |
| Driver type | Dynamic | — |
| Driver size | 40 mm | — |
| Lowest frequency | 5 Hz | 15 Hz |
| Highest frequency | 32,000 Hz | 35,000 Hz |
| Impedance | 36 Ω | 32 Ω |
| Sensitivity | 100 dB | 100 dB |
| Noise control | ||
| Active noise cancelling | No | No |
| Battery & charging | ||
| Battery life | 60 h | — |
| Charging time | 4 h | — |
| Fast charging support | Yes | — |
| Connectivity | ||
| Wireless | Yes | No |
| Bluetooth version | 5 | — |
| Bluetooth codecs | AAC, 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 | Yes |
| Design & build | ||
| Weight | 216 g | 460 g |
| Colours | — | Brown, Black, Red |
| Features | ||
| Hands-free calls | Yes | — |
