I asked this question to Chris K. and posted his response somewhere, but for the life I cannot locate it using search. His response was that the filters themselves are not altered by the choice of crossover values in Pro. When I asked him what was meant by the Pro message "Finalizing filters..." after the crossover selection was made, he said something that I cannot recall, other than it wasn't changing the filters in any way. I thought we had agreed to add Chris' response to the Pro FAQ, BICBW. Regardless, a search of the FAQ doesn't find an answer.