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6.1Noise control & calls3.9
Why is Clam Ace 2 better than HD 400U?
- Active noise cancellingYes · HD 400U: No
Why is HD 400U better than Clam Ace 2?
HD 400U has no measurable advantages in this pair.
Specifications
Side by side
| Sound | ||
| Fit | Over-ear | Over-ear |
| Ear cup design | Closed-back | Closed-back |
| Driver type | Dynamic | Dynamic |
| Lowest frequency | — | 18 Hz |
| Highest frequency | — | 20,000 Hz |
| Impedance | — | 18 Ω |
| Sensitivity | — | 120 dB |
| Adjustable equaliser | Yes | — |
| Noise control | ||
| Active noise cancelling | Yes | No |
| Transparency / ambient mode | Yes | — |
| Microphones | 2 | — |
| Noise reduction for calls | Yes | — |
| Battery & charging | ||
| Battery life | 100 h | — |
| Battery life with ANC | 60 h | — |
| Charging time | 2 h | — |
| Quick charge (claimed) | 10 min → 8 h | — |
| Fast charging support | Yes | — |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 6 | — |
| Multipoint (two devices) | Yes | — |
| USB-C | Yes | Yes |
| 3.5 mm jack / AUX | Yes | Yes |
| Smart & streaming | ||
| Voice assistant | Google Assistant, Siri | — |
| Companion app | Yes | — |
| Design & build | ||
| Foldable | Yes | — |
| Features | ||
| Hands-free calls | Yes | — |
