It really is not the tweeter hight that makes the biggest difference, it's the location of the midrange drivers. But MBL have added a upwards firing adjustable tweeter on top of the main tower, it must make some difference.Gentlemen, the posts about the tweeter height above... does the tweeter height really matter? It's spherical and omni-directional, and the sound waves are pretty directional at those frequencies. So why should the tweeter height matter than much? We can also sit up and slouch at times...