If I turn up my Kenwood I get into the 90db range pretty easily. (Granted, I find that to be quite loud, and don't listen at those volumes.) If you can only reach 75db at the peak of the Pioneer's volume range, that doesn't sound right to me. I second the comment that the Axioms are not the problem though. How big is your room, and how far away from the speakers are you doing your calibration?

[black]-"The further we go and older we grow, the more we know, the less we show."[/black]