Originally Posted by 1stJeepGC
In all honesty, if you replaced the rear door speakers, the rear pillar speakers might not do anything for you. Again, the speakers are preset in terms of time delay as per the factory DSP settings. Also, the sound is going to get lost because of this and the lack of power. In this type of SQ system design, you do not want that much highs coming out from the rear D pillar speaker.
Thanks 1stJeepGC for all your input, that's a good point and why I am hesitant to even bother doing the rear pillars. My next move will be the front center spearker and sub or at least just the sub but I may wait a bit for that. Thanks