Thanks for cleaning up hic's mess Al. Maybe we can get this back to a civilized adult discussion about l-r rearfill.
The biggest piece of advice I have for anyone wanting to try it is if you don't have the right tools to do it then don't bother because you probably won't like the results. If you want to put the effort into doing it correctly with the right processor then it's worth a try just to say you did it. If you can hear them playing with the fronts playing the rears are too loud. Each vehicle will want a different bandpass on the rears and the lower the lowpass the further back the "room" will seem to be in my experience. This is why I preferred 3500hz over say 5000hz. I'm a little rusty on the topic because I haven't messed with l-r rearfill in a while. As it sits I'd have to put the mids in pods back there because the factory locations are pretty low. My sub box is completely blocking the passenger side rear speaker and no plans to change the configuration of the install. I guess me saying I wasn't going to do it sent hic into a tailspin but the experience I got with it in the Grand Cherokee was priceless. I really do think it helped A LOT with the staging considering I had a 2-way front in it. I have a 3-way front in the Ram and stage is already plenty high and deep.