Thank you for the answer, Jarekfracek. :)

Since I would like to use the Bluetooth function, the question for me is whether the Bluetooth pairing is still permanently open once you are in Bluetooth mode (i.e. anyone can connect to the speakers without having to activate the pairing first).
Since I live in a multi-party building, it could happen that someone simply connects to the Bluetooth, thereby interrupting my connection or playing something else. That would be a killer criterion for me.

Thank you very much.

I do not have this problem. I can freely choose which mode my speakers are in. They never switched and blocked in Bluetooth mode. I am satisfied with the speakers.