@mahghiter you are an intelligent and articulate individual. However my ATC SCM11‘s sound absolutely wonderful in. my bedroom system without any room treatments.FIRST I am sure what you said is true....
SECOND some speakers in some room sound "good" without any acoustic control...
THIRD of these fact you cannot deduce that this is a rule...It is an exception...
FOUR you cannot know and you are not interested by the way they could sound even better with some acoustic passive treatment and some active controls.... It seems not necessary because they sound already good and i understand you... Who want to introduce acoustic control in a bedroom?
FIVE this fact that some speaker sound already good in some room contradict absolutely not what i speak about...
Sounding already good and working at their peak S.Q. potential is not the same thing......
Regards and best wishes.....
P.S. they seems very good speakers indeed....