I'm building some speakers today(yay!) and I don't know enough about electronics to figure this out. I'm using three-way crossovers, and it has big resistors on it. Do I still need some for the piezo ...

so which is best to use, the crossover from the amp or from the headunit or from the speakers? or all of them at once just to make sure the signal is right in case the other filter is retarded?<P>my ...