Originally posted by CJFEDERLE:
If you really wanted to do it right you'd putin some kind of processor with a rear channel time delay and mabry one for the front. I did and can use time alingment to mave the sound stage. Much easier than getting 20 ft of wire bundeled up to run rear speakers IMO. 
Time delay is to correct unequal distances from the speakers to your listening position. The speed of sound (IIRC, 320ft/s) is like a snail's pace compared to electrical current (near instantaneous).
You could put a thousand foot length vs. a 1ft length of speaker wire in your car w/o perceptably altering the soundstage. There might be a noticable decrease in output due to the increased resistance of the extra wire, though.
