Having built many Xovers ,passive such as a passive preamp is not active and
you loose a lot of dynamics , electronic Xovers will change the Xover points and enhance certain aspects of the frequency band but imo,flatten the sound no life a true active Xover you choose the parts especially capacitors, Such a Duelund being a top quality capacitor,
vh audio ,Jupiter Jantzen Alumina Z , there are many ,
resistors for speakers there are only two, theNewer Mundorf Ultra Copper foil is most neutral and detailed , Path audio a bit warmer ,not quite as detailed but still very good in absolute terms. ,I have never cared for electronic Xovers except in Bass where it is not in the critical midrange region ,,I am speaking in Loudspeaker terms , in electronics such as preamps ,absolutely a Active preamp,
if A tube preamp many top ones don’t use capacitors on the output ,there are trade offs, with capacitor output stage you Taylor the sound with capacitors ,I use Tinned Copper foil Duelunds, in Top Vacuum tube some use very high quality chokes and Transformers to couple the output stage ,then it comes down to design
for many use Lundahl transformers and chokes , then Upper Monolith, or Hashimoto .all depends on budget. All depends on the application design engineering.