vs
Why is TUNE 135BT better than CX 80 U?
TUNE 135BT has no measurable advantages in this pair.
Why is CX 80 U better than TUNE 135BT?
- Weight19 g vs 14 g+31%
- Lowest frequency20 Hz vs 17 Hz+18%
Specifications
Side by side
| Sound | ||
| Fit | In-ear | In-ear |
| Ear cup design | — | Closed-back |
| Driver type | Dynamic | Dynamic |
| Driver size | 8.6 mm | — |
| Lowest frequency | 20 Hz | 17 Hz |
| Highest frequency | 20,000 Hz | 20,000 Hz |
| Impedance | 16 Ω | 28 Ω |
| Sensitivity | 99 dB | 119 dB |
| Adjustable equaliser | Yes | — |
| Battery & charging | ||
| Battery life | 25 h | — |
| Battery capacity | 130 mAh | — |
| Charging time | 2 h | — |
| Fast charging support | Yes | — |
| Connectivity | ||
| Wireless | Yes | No |
| Bluetooth version | 5.4 | — |
| Bluetooth codecs | AAC, SBC | — |
| Hi-res codec (LDAC / aptX HD / LHDC) | No | — |
| aptX | No | — |
| LDAC | No | — |
| Multipoint (two devices) | Yes | — |
| USB-C | — | Yes |
| Design & build | ||
| Weight | 19 g | 14 g |
| Protection rating | IPX4 | — |
| Water resistance (IPx) | IPx4 | — |
| Colours | Black | — |
| Features | ||
| Hands-free calls | Yes | — |
