That's what I have. I have five each Hsu HB-1 Mk2 in a 5.2 system. I rotated the center's horn tweeter. I verified with Hsu Research that it wouldn't affect the warranty. I'd think it wouldn't be necessary with a dome tweeter.3. I've seen people do #2 (ha, that sounds funny, I see people do number two) with bookshelf speakers by putting the bookshelf on its side, but I recall they also had to rotate the Tweeter 90° because of the dispersion pattern of the Tweeter.