I don't want a debate, but I'm having a great deal of difficulty finding algorithms for crossovers, let alone how they might affect the band passing nature of the filters.
Update from the helpful comments:
I'd like to ask more specifically what kind of low- or high-pass filter circuit/algorithm to use for a crossover? I'm currently choosing one for an install, but have little idea how to differentiate the good from the ugly. Note I'm asking about algorithms specifically here, not a product recommendation since those generally elicit debate.