Why is HD 450BT better than SRH440A?
- Active noise cancellingYes · SRH440A: No
- Weight238 g vs 268 g+13%
Why is SRH440A better than HD 450BT?
- Lowest frequency18 Hz vs 10 Hz+80%
Specifications
Side by side
| Sound | ||
| Fit | Over-ear | — |
| Ear cup design | Closed-back | Closed-back |
| Driver type | Dynamic | Dynamic |
| Driver size | — | 40 mm |
| Lowest frequency | 18 Hz | 10 Hz |
| Highest frequency | 22,000 Hz | 22,000 Hz |
| Impedance | — | 40 Ω |
| Sensitivity | 108 dB | 97 dB |
| Adjustable equaliser | Yes | — |
| Noise control | ||
| Active noise cancelling | Yes | No |
| Noise reduction for calls | Yes | — |
| Battery & charging | ||
| Battery life | 30 h | — |
| Battery life with ANC | 30 h | — |
| Battery capacity | 600 mAh | — |
| Charging time | 2 h | — |
| Connectivity | ||
| Wireless | Yes | No |
| Bluetooth version | 5 | — |
| Bluetooth codecs | aptX, AAC, SBC | — |
| Hi-res codec (LDAC / aptX HD / LHDC) | No | — |
| aptX | Yes | — |
| LDAC | No | — |
| USB-C | Yes | — |
| 3.5 mm jack / AUX | Yes | Yes |
| Smart & streaming | ||
| Voice assistant | Google Assistant, Siri | — |
| Companion app | Yes | — |
| Design & build | ||
| Weight | 238 g | 268 g |
| Foldable | Yes | — |
| Colours | Black, White | Black |
| Features | ||
| Hands-free calls | Yes | — |
