What is the “master EQ in Cubase”?
I don’t understand what you are trying to accomplish.
And if I did understand I probably wouldn’t bother wasting my time trying to explain anything to you because you don’t seem to comprehend anything you are being told and don’t have the decency to respond to any help 
.
And what the Hell does bypassing getting a “31 band EQ” have to do with “tuning” or "EQ"ing your monitors?