Quote Originally Posted by walpurgis View Post
Having the tweeter below the main driver was largely a fashion thing at the time I think, although there can be sensible reasons to do this. It can help ameliorate the effects of poorer quality tweeters and sometimes does have time alignment benefits. There are other tricks that can seem to benefit the sound, have you noticed that speakers with backward sloping baffles seem well received? Reference 3a and Spica spring to mind, amongst others.
I think the B&W DM2s were meant to be used on their own stands which tilted the speaker back a little. And there was the Meridian M1 active speaker which also had a backward-sloping baffle.