stacking speakers?

I am kind of new to this high end stuff and usually read all the posts just to learn from those with more knowledge and experiance then myself, so this suggestion might sound off the wall but ,WHY DON'T YOU TRY STACKING THEM AND SEE HOW IT SOUNDS INSTEAD OF DEALING WITH THE POSSIBLE PROBLEMS THAT DON'T EXIST YET?

Tsugury, sure I coud have stacked the speakers first, had problems, then started asking questions, but why? Isn't that the purpose of these forums, To find answers to our questions before hand. Up until two days ago the words "Sympathetic Resonances" wasn't even in my vocabulary. I now know what it refer's to, and have several option for fixing the problem if I still decide to go that route. Being a novice on a budget, I can't afford the trial and error route.
I've read to many threads of people doing that and blowing amps, speakers, or whole systems. If it's something that I know with my limited knowledge, that won't hurt anything, then I'll do it, but why not gatherig as much information possible about something before doing it for the best possible results. What would be the use of these forums if we don't ask questions?

Sorry DBX, I guess I came through a little rough and should have explained myself better.As far as I know , there is no damage that can be done by stacking speakers on top of each other from two seperate systems ( except maybe scratchin the speakers, and be careful not to short any wires), maybe someone could correct me ?. So then, the only way I know of to see if, or how much the sound is effected is to try it out. Bottom line is your gonna have to try it, it will cost you nothing more then the time it takes to set it up. Then IF there is a problem with the sound you can identify the problem and (with the help of those in the forum) ,work on fixing it.