vs
4.0Noise control & calls7.2
Why is SRH840A better than REAL Blue 2021?
- Lowest frequency5 Hz vs 10 Hz2×
- Weight273 g vs 280 g+3%
- Highest frequency25,000 Hz vs 20,000 Hz+25%
Why is REAL Blue 2021 better than SRH840A?
- Active noise cancellingNo · SRH840A: Yes
Specifications
Side by side
| Sound | ||
| Fit | Over-ear | Over-ear |
| Ear cup design | Closed-back | Closed-back |
| Driver type | Dynamic | Dynamic |
| Driver size | 40 mm | 40 mm |
| Number of drivers | — | 1 |
| Lowest frequency | 5 Hz | 10 Hz |
| Highest frequency | 25,000 Hz | 20,000 Hz |
| Impedance | 40 Ω | 18 Ω |
| Sensitivity | 97 dB | 102 dB |
| Adjustable equaliser | — | Yes |
| Noise control | ||
| Active noise cancelling | No | Yes |
| Transparency / ambient mode | — | Yes |
| Noise reduction for calls | — | Yes |
| Battery & charging | ||
| Battery life | — | 55 h |
| Battery life with ANC | — | 41 h |
| Battery capacity | — | 700 mAh |
| Fast charging support | — | Yes |
| Connectivity | ||
| Wireless | No | Yes |
| Bluetooth version | — | 5 |
| Bluetooth codecs | — | aptX, AAC |
| Hi-res codec (LDAC / aptX HD / LHDC) | — | No |
| aptX | — | Yes |
| LDAC | — | No |
| Multipoint (two devices) | — | Yes |
| USB-C | — | Yes |
| 3.5 mm jack / AUX | Yes | Yes |
| Smart & streaming | ||
| Companion app | — | Yes |
| Design & build | ||
| Weight | 273 g | 280 g |
| Foldable | — | Yes |
| Colours | Black | — |
