Why is TE-BD21j better than Space A40?
- aptXYes · Space A40: No
Why is Space A40 better than TE-BD21j?
- Battery life9 h vs 10 h+11%
- LDACNo · TE-BD21j: Yes
- Driver size8 mm vs 10 mm+25%
- Earbud weight (each)5.2 g vs 4.9 g+6%
Specifications
Side by side
| Sound | ||
| Fit | In-ear | In-ear |
| Ear cup design | — | Closed-back |
| Driver type | Hybrid | Dynamic |
| Driver size | 8 mm | 10 mm |
| Lowest frequency | — | 20 Hz |
| Highest frequency | — | 40,000 Hz |
| Impedance | 32 Ω | 16 Ω |
| Sensitivity | 92 dB | 104 dB |
| Hi-Res Audio | — | Yes |
| Adjustable equaliser | — | Yes |
| Noise control | ||
| Active noise cancelling | — | No |
| Transparency / ambient mode | Yes | Yes |
| Microphones | — | 6 |
| Noise reduction for calls | — | Yes |
| Battery & charging | ||
| Battery life | 9 h | 10 h |
| Total with charging case | — | 50 h |
| Charging time | 2 h | 2 h |
| Quick charge (claimed) | — | 10 min → 4 h |
| Fast charging support | — | Yes |
| Wireless charging (case) | — | Yes |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5.2 | 5.2 |
| Bluetooth codecs | aptX Adaptive, aptX, AAC, SBC | LDAC, AAC, SBC |
| Hi-res codec (LDAC / aptX HD / LHDC) | Yes | Yes |
| aptX | Yes | No |
| LDAC | No | Yes |
| Multipoint (two devices) | — | Yes |
| USB-C | Yes | Yes |
| Smart & streaming | ||
| Voice assistant | — | Siri |
| Design & build | ||
| Earbud weight (each) | 5.2 g | 4.9 g |
| Protection rating | IPX4 | IPX4 |
| Water resistance (IPx) | IPx4 | IPx4 |
| Colours | — | Navy Blue, Black, White, Fresh Green, Purple |
| Features | ||
| Touch controls | — | Yes |
| Hands-free calls | Yes | Yes |
