I understand.. So it seems 3.5 is a no go then.. How does usb-c wired compare to BT-W5 aptx adaptive dongle? Is it getting close enough to wired?

That is absolutely awesome idea, as it would allow me to not wear a cable or a mini jack 3.5 to 3.5 adaptor and a BTR15 attached to Bathys. Ofc, I will have to accept that my phone has a little "knot" in my pocket, but yes, I think is worth it. As for the having to wear a cable, probably I...

Let me put it this way: My phone is Honor Magic 5 Lite, and it supports Bluetooth 5.1 with BLE, SBC, AAC, LDAC. Focal Bathys support SBC, AAC, aptX Adaptive, aptX. So in my situation, using Bluetooth, I will get AAC at best. However, if I would use a DAC/AMP like BTR15, which supports LDAC...

I would very much appreciate if you could share your experience regarding the sound quality comparison between DAC mode with USB C cable from phone/computer and using a portable DAC/amp connected to your headphones by 3.5 jack cable. I did read that 3.5 don't provide such a nice sound quality as...