Usually hit or miss depending on the vehicle and the vehicle's acoustical properties. Basically why most competition winning systems dont use passive crossovers since its a set crossover point. Every speaker set will sound different in each car based on the car door shape, airspace along with how the sound waves reflect and even down to the seat fabric and shape of the windshield/A pillars. Also Passive crossovers is just another circuit board that builds up heat and causes inefficiency in the system so clean power output to mid and tweet is further limited. You basically have ZERO control over the output of the mid and tweeter. Based on the acoustics, you sometimes need to lower the tweeter or mid in order for the drivers to perfectly blend. Hence why the highest end install shops design the whole speaker system around a vehicle's acoustics with proper testing via RTA and many other acoustical tests. Basically just from driver selection and using proper crossover points, you can achieve already magnificent results many others can only dream of. Afterwards, the EQ and time alignment brings it to the next level along with acoustical treatments.
This is a basic process of a shop in my area. Sometimes they even change the seat fabric in order to get a perfect acoustical listening environment while keeping the car extremely classy(they mainly work on porsche, higher end mercedes and other supercars.) I have to say their demo cars are way up there in terms of the best sounding vehicles i've listened to. I'd say easily rivaling the MECA SQ world finalist car from my subjective point of view.
As a former phd fb pro user... Their crossovers is so so very overpriced for what you get. CDT and PHD are "high end wannabe" companies i'll never waste my money on ever again. I achieved way better results with drivers that are built much tougher and reliable along with way better sound at a fraction of the price.