I really like using the recording feature to do sound checks. We go through all of our checks, then I watch the video locally in VLC. That way I'm certain when it goes live it'll sound the way it's supposed to.
I wish more people would do this. Or maybe OBS should have some (opt-out) warnings for when your audio is either unbalanced, too low or too loud. I seen way too videos or streams with bad audio levels.