Is it possible to EQ the mic settings without effecting global keyboard settings? If so, how?

Perhaps a bit more info would help. I've set my MAXX global settings for each of my PA's...i.e. One setting for my JBL system, one for my Yamaha and another for my Spacestation V.3.

Thing is the EQ for my voice changes a bit with each MAXX setting. I'm wondering if I can set my mic settings so they are not affected by the changes from one PA to another.

Make sense?

Tx