Well I use my ears, I don't know about the rest of you but I trust mine. If I can't hear an improvement I don't do it. I find the multiple driver speakers sound more musical/lifelike, YMMV. I am sure Sean will be able to whip up some technical stuff that I won't understand, but will satisfy your question. There is NOTHING technical about music, this reminds me of the endless trolling threads about cables in particular PC's, if you can't hear the difference then don't spend your hard earned dollars, plain and simple.
~Tim
~Tim