+10 for your sub trim?!!!!Yeah, I'm at +10db in Sub trim in the AVR to get levels at what i prefer.
Yeah.... either something is not right or you are a very serious basshead! I would definitely redo things. I suggest just running things through your AVR and calibrate that way first and see what your levels come out to be. That will give you a place to start and give you an idea of the levels you should be getting with basic calibration. Then, armed with that info you can bring in the minidsp.
What AVR do you have?