It's not that the stereo is at one volume and then just gets louder out of no where...its the sensitivity between levels of the knob... like "1" is 50 db, and "2" jumps to 60 db or something like that (not actual measurements) whereas in my Audi or even my wife's Honda, "1" is 50db and "2" is 52db, and to get to 60db you have to turn it to 5 or 6 or the like.
It seems in Kia you get "can you turn that stereo down", you turn it down one notch and its "I can't hear it". But there is no inbetween.
Follow what I mean?
But I do need to spend some time playing around with the settings from suggestions on this board and others.