Thanks. It looks like that's the tool that was originally done by Jeff Bagby which seems to be held in high regard. In this software does it provide any topology/circuit suggestions or does it just calculate the effect of the circuit and values that you select on your own? If the latter, what resource do you use to decide on the xover order and values?All I know that's free, and very technically accurate, is passive crossover designer (PCD). It was ported to a windows app a while back so it no longer requires Excel to run. There's nothing automatic about the process of using it, though...
If you are starting a new speaker build and are not in a hurry, I could help walk you through using it.