I completely understand. I was in the exact same boat. But before you can determine what is used, you have to understand what good parts are for a crossover first. I have owned the Aviors and have owned several pairs of Wilsons. They all use decent but cheap parts. They are OK parts but far, far, far away from the best parts.
Once you hear a speaker with copper foil caps, Mills wire wound resistors and high quality inductors your jaw will drop.
This statement is proof enough that you have no clue what you’re speaking of, that and you likely haven’t owned speakers anywhere near the caliber of Aviors. Rockport actually customizes the crossover of each individual speaker to account for the minute differences of each individual driver, so no two pair of speakers will have the exact same inductor/cap specs. The benefit of this should far exceed that of merely using the most expensive/boutique parts money can buy.
A good speaker is more than the sum of high quality parts.