I built this door panels to house a 3 way setup:

https://www.s2ki.com/s2000/gallery/i...8-img-1509jpg/

Its sounds truly amazing... 3 ways are the way to go!! Do it!!

 

Instead of putting two lower door speakers...put one in the stock location and one behind the rear door. Makes a world of a difference. If anybody in Sac area want to hear my system, which is just polk coaxials, hit me up.

 

Yeah I have 3ways in the doors and 5 1/4" Alpine behind the seats... It's so loud. Breaking up the 3 way system is not really a good idea though as it break up the imaging.