rear firing tweeters....

Sonus Faber seems to like the idea.

I don't mind what my listening room sounds like, but I do mind being told what live music sounds like since I've successfully played it and mixed it for money most of my life. Rear firing tweeters are interesting, sometimes sound great, but are simply unnecessary if your main speakers aren't surrounded by mattresses or 6 miles of open space.

Remember the Bose speakers that were designed to point 8 little EQd woofers (each) at the wall with one or two pointed at the listener? People loved those things...and then Bose took the front speakers off and turned them around to sell as Pro Sound speakers. About a zillion people bought those...and for nearfield PA stuff they're not too bad with proper EQ, although I think a good 2 way horn design is better. A lot of Bozes on that bus.