I did this. Follow everything. Because of my mismatched subs. Move the first sub knob til I get 72db then turn off did the same thing to the other sub til get 72db.connect both subs using y adapter Run the avr test tone both subs read 71-72 db. run the first measurement check the trim and how come the sub trim is -11.0db???
Well I guess at this point we need to identify what exactly you are using to measure. I was using a basic radio shack spl meter in which I had to set at 65db in. Order to achieve a -1.5 db after running Audyssey. I recently learned its inaccurate at lower frequency levels. If you have nothing else I would say run one single round of chirps then calculate and see where you level on your sub is. Too much? Lower the gain knob and run again just once to see where it's at. From what I read the Audyssey mic is accurate within 2db so this would work.