I'm kind of curious as to where the measurement for a crossover should be taken with the various types and slopes. I vaguely remember soundhound saying -3db for 12 db/octave slope and -6db for 24 db/octave slope. Is that right? And does the crossover type matter? I mean insofar as Linkwitz/Reiley vs Butterworth. And just for fun, what about an 18db and a 48 db slope? How about mixing and matching slopes. Like for the (seemingly) more common 12 and 24, if one was a 12 and the other a 24 would they both go from the same db down point or would each use their respective point I listed above?

Obviously it's where it sounds best, but in theory where should it be? To give a good starting point at least.