Deactivate A4/AR as audio device in windows? - OB in Studio One

Hey

I know this may not be the most clever question, but I try to understand how this works…:wink:

I have an Clarett 4 Pre USB interface which I use with Studio One in Windows 10.
I use OB in Studio One for AR MK1 and A4 MKII.

In Windows audio preferences, Clarett 4, AR and A4 are listed as IN and OUT devices.

The question:
If I only use OB inside Studio One. should A4 and AR be inactive? Don’t seem to make any difference. Any reason why/why not?

Thank!