I think I will have to disagree with you for the first timeAnother reason to not use the supplied crossovers is they eat up power, as much as 40%
Although coils in the xover are designed to create resistance, have you ever touched a crossover and went "ouch that's hot"?
Passive Crossover are commonly found inside wooden and plastic fiber filled home speakers that can commonly run on 100+ watts. If 40% loss was true, that would a fire hazard.
Mind you I am not an electrical engineer
Stock tweeter has a capacitor right next to it. I would not dare run a tweeter without one.the stock amp has crossovers apparently and while they may not be exactly what the Infinity crossovers use, I figured it was close enough, they sound great and time will tell if the tweeters are ok