Originally posted by LilStrypedSVT:
The ONLY scenario that works with powering the rears over the front is if you have REAR DECKLID speakers (like Grand Prix's, etc). Because the sound is produced above your head and to the rear of your ears, it completes the harmonics of the speakers much better= soround sound. Rear door speakers (especially in the position in the contours/mystique) are near worthless in improving your music sound and quality, they only help for the rear passengers. And if you are like many people, I rarely have people in my car, and even if I do... screw them, I want the music to sound the best for ME. Good luck on the install, should find tons of shops to do it for ya! 
I have issues with one thing here, in specific, the surround sound comment. Most car audio systems (pretty much any without DVD capability) are stereo, not surround sound. Factory audio systems use speakers in rear locations only for rear passengers, who I don't care about at all.
Even if they are mounted rear deck, the sound is eminating from a point behind you which is out of place.
Not arguing or anything like that, just clearing up any possible misconception 
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