for instance using a low pass for an example, if the cutoff is 400hz for a 12" driver
does the active equalizer at the low-mid pass close & open the loop for the low-mid ( e110)

the 12" is not allowed to play past 400hz with the cut of for the low mid set at 400hz how, my question is
how does the crossover communicate with the low pass to tell it to not play over 400hz, my guess, is at the
next filter.

please verify.