It's a good idea but I agree with PonyOne, it's probably not a practical option unless you're already very well off an/or people pay huge loads of money for your gigs. For the money you might as well line up a wall of speaker cabinets at your audience.
"If one has realized a truth, that truth is valueless so long as there is lacking the indomitable will to turn this realization into action!"
-A.H.