[Laser02]

Rear speakers are pointless.

 

[Laser02]

Hatch-backs always sound better.

 

[Laser02]

Ever heard of rear-fill?

Ever heard of imaging that doesn't blow ass?

 

[Laser02]

Here. Maybe this will help.

http://www.teamcaf.org/geolemon/Phasing/Multiple.htm

 

[Laser02]

http://www.crutchfieldadvisor.com/S-QuUBIVVIWll/learningcenter/car/speakers_imaging.html

Rear speakers and "ideal soundstage" should not go together in a sentence... Unless that sentence is something like: You don't produce an ideal soundstage by adding rear speakers. Or: Rear speakers sure do suck for producing an ideal soundstage.

You don't create a soundstage in front of you by adding speakers behind you. There is a very small gain by adding rear speakers, which is outweighed heavily by all the phasing problems you introduce. At best your rear speakers are doing nothing (90* out of phase), at worse they are cancelling out your sound (180*.)