there are no crossovers as such in the car
the only form of crossover is a capacitor in line on the tweeter
and if you are going to fit an amp you want to be putting the crossovers in the doors
this cuts out fitting time and saves you money as you will only need to run 1 speaker cable to each do whereas if you fit the c rossovers in the boot you will need to run 2 cables to each door