Why is HD 400U better than Space 2?
- Lowest frequency18 Hz vs 20 Hz+11%
Why is Space 2 better than HD 400U?
- Active noise cancellingNo · HD 400U: Yes
Specifications
Side by side
| Sound | ||
| Fit | Over-ear | On-ear |
| Ear cup design | Closed-back | Closed-back |
| Driver type | Dynamic | Dynamic |
| Driver size | — | 40 mm |
| Lowest frequency | 18 Hz | 20 Hz |
| Highest frequency | 20,000 Hz | 20,000 Hz |
| Impedance | 18 Ω | 16 Ω |
| Sensitivity | 120 dB | 120 dB |
| Hi-Res Audio | — | Yes |
| Adjustable equaliser | — | Yes |
| Noise control | ||
| Active noise cancelling | No | Yes |
| Transparency / ambient mode | — | Yes |
| Noise reduction for calls | — | Yes |
| Battery & charging | ||
| Battery life | — | 50 h |
| Battery life with ANC | — | 70 h |
| Charging time | — | 2 h |
| Quick charge (claimed) | — | 5 min → 4 h |
| Fast charging support | — | Yes |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | — | 6.1 |
| Bluetooth codecs | — | LDAC, AAC, SBC |
| Hi-res codec (LDAC / aptX HD / LHDC) | — | Yes |
| aptX | — | No |
| LDAC | — | Yes |
| Multipoint (two devices) | — | Yes |
| USB-C | Yes | Yes |
| 3.5 mm jack / AUX | Yes | Yes |
| Smart & streaming | ||
| Companion app | — | Yes |
| Design & build | ||
| Weight | — | 260 g |
| Foldable | — | Yes |
| Colours | — | Seafoam Green, Linen White, Jet Black |
| Features | ||
| Hands-free calls | — | Yes |
