I'm no amateur when it comes to speaker design. They have carefully designed in LEAP and fine tuned to the location and room to yield the flattest response. Baffle step and diffraction have also been considered. Passives just doesn't have the flexibility of an active filter. A passive in a 3-way can quickly get both advanced and expensive. The room modes cannot simply be fixed with passives in any practical manner. 'Dynamics' can sometimes refer to heavy deviation in frequency response, I know some EMMA judges call an un-EQed response 'dynamic'. Me myself does not like that at all. I don't want that 'live' sound.
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Active crossovers make the replacement process WAY easier. Throw in DSP and you will wonder why you agonized over building custom passives in the first place. I'm starting to find that the older I get, the less patience I have to deal with problems in my hobbies... Hobbies are supposed to be fun and not piss me off more than the things that piss me off at work!