Originally Posted by grvv
The ES-04 that I have in the back is 2.28" deep (58 mm), and the ES-03 1.69 (43 mm) they will fit in front door panels. I would like to put the 4"ers in front if they would fit. These are going in 2009 E92
Ok I see your issue is depth. Why not choose a different 4" driver?
The kicker's can supposedly play up to about 500hz but you really don't want that as it will pull your soundstage down. Better to have a larger driver in the door.