Why is FD15 better than OpenSwim Pro?
- Weight12 g vs 27 g2.3×
- Highest frequency40,000 Hz vs 20,000 Hz2×
Why is OpenSwim Pro better than FD15?
OpenSwim Pro has no measurable advantages in this pair.
Specifications
Side by side
| Sound | ||
| Fit | In-ear | Bone conduction |
| Ear cup design | Closed-back | — |
| Driver type | Dynamic | — |
| Lowest frequency | 10 Hz | 10 Hz |
| Highest frequency | 40,000 Hz | 20,000 Hz |
| Impedance | 32 Ω | — |
| Sensitivity | 112 dB | 105 dB |
| Hi-Res Audio | Yes | — |
| Adjustable equaliser | — | Yes |
| Noise control | ||
| Active noise cancelling | — | Yes |
| Battery & charging | ||
| Battery life | — | 15 h |
| Fast charging support | — | Yes |
| Connectivity | ||
| Wireless | No | Yes |
| Bluetooth version | — | 5.4 |
| Bluetooth codecs | — | AAC, SBC |
| Hi-res codec (LDAC / aptX HD / LHDC) | — | No |
| aptX | — | No |
| LDAC | — | No |
| Multipoint (two devices) | — | Yes |
| 3.5 mm jack / AUX | Yes | — |
| Design & build | ||
| Weight | 12 g | 27 g |
| Protection rating | — | IP68 |
| Water resistance (IPx) | — | IPx8 |
| Dust protection (IP) | — | 6 |
| Colours | — | OpenSwim Pro Grey, OpenSwim Pro White, OpenSwim Pro Red |
| Features | ||
| Hands-free calls | — | Yes |
