vs
5.9Noise control & calls4.0
Why is AL4 Freedom Mini better than HD 400U?
AL4 Freedom Mini has no measurable advantages in this pair.
Why is HD 400U better than AL4 Freedom Mini?
- Lowest frequency20 Hz vs 18 Hz+11%
Specifications
Side by side
| Sound | ||
| Fit | Over-ear | Over-ear |
| Ear cup design | — | Closed-back |
| Driver type | — | Dynamic |
| Lowest frequency | 20 Hz | 18 Hz |
| Highest frequency | 20,000 Hz | 20,000 Hz |
| Impedance | — | 18 Ω |
| Sensitivity | — | 120 dB |
| Adjustable equaliser | Yes | — |
| Noise control | ||
| Active noise cancelling | No | No |
| Noise reduction for calls | Yes | — |
| Battery & charging | ||
| Battery life | 36 h | — |
| Battery capacity | 250 mAh | — |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5.3 | — |
| Bluetooth codecs | AAC, SBC | — |
| Hi-res codec (LDAC / aptX HD / LHDC) | No | — |
| aptX | No | — |
| LDAC | No | — |
| Multipoint (two devices) | Yes | — |
| USB-C | Yes | Yes |
| 3.5 mm jack / AUX | Yes | Yes |
| Low-latency game mode | Yes | — |
| Smart & streaming | ||
| Voice assistant | Google Assistant, Siri | — |
| Companion app | Yes | — |
| Design & build | ||
| Weight | 41 g | — |
| Protection rating | IPX6 | — |
| Water resistance (IPx) | IPx6 | — |
| Foldable | Yes | — |
