I know these can be used horizontally or vertically, but how about upside down? Can that be done safely with the E5's? Are there any internal issues that may be caused due to weight distribution? I've read inverting the speakers is a 'thing' when trying to get the tweeters pointed at your ears. In my case, if I flip them upside down, they are perfectly pointed at my ears. Otherwise I'm in for a bit of a mod with my mixing table, which is no biggy, but work smarter and not harder n all of that.
Cheers