No reason other than the stereo separation sounds better when the speakers are farther apart. You could construct a sound colum that would house the all the speakers permanently, something with openings in various directions that would be similar to the Bose system's construction. And, if you were good at wiring, you could rig up a single plug at both ends that would facilitate a faster, easy connection to the sub. It can all be done, however, it does take time, and of course some funding.

Good Luck,

Gary