I would disagree with the Bose comments. If you care about stereo sound it takes two systems and they are tricky to set up. I have worked with several musicians who love them but to my ears they are not nearly as good as a standatrd stereo rig at about half the cost. I recently atended a friends concert using two two systems for a bluegrass group. Even with two poles and two subs the sound was very weak twenty feet out. Try before you buy.