The BT-W5 is quite expensive and the RWA-359 seems to be exclusively listed on Russian shops, I doubt I can get that in the EU. Maybe you know of any decent budget dongles sold on Aliexpress or elsewhere?

Thanks, would you be able to recommend any actual BT dongles?

Does anyone know if the KB9P is compatible with this LDAC driver? https://www.bluetoothgoodies.com/a2dp/ If i were to connect the Soudpeats Air3 Deluxe HS via the KB9P, could I use LDAC, or would I have to buy a BT dongle that gets recognized as such by Windows?

I accidentally downgraded the firmware of my KB9P upon first use. I wasn't aware that they ship with firmware installed and downgraded from 2.14 to 2.11. Will this be a problem? If so, could someone share the 2.14 firmware file with me? I'd greatly appreciate it.