thanks for the answers. one more question: if audyssey originally set my m22's at 50hz and I have since increased to 80hz, I assume I can re-adjust lower to minimum of 50hz without buggering up the audyssey calculations?
Yes you can re-adjust it back down again w/o messing up Audyssey. The receiver retains the EQ curve it calculated until you run Audyssey again and generate a new curve.
One thing I’ve always done if I run Audyssey is to write down all the settings, speaker distance, level, crossover, etc. . . so I can always get back to exactly what Audyssey and the receiver calculated w/o having to run it again.