Tweeters should always face out for the widest possible image. These speakers aren't designed for horizontal mounting. Yes, the response would be messed up but it's unknown how much difference that orientation would make for sides, rears and heights.
Understood, thank you.
I’m also contemplating removing the elbow section of the bar which was also suggested. This would mean there’d be no counter top into the room which currently would interfere with the right surround placement. Might make things a little easier.
So if I’m going to go the M5 route it sounds like I’d need to do 6 x bookshelves for all ceilings and rear surrounds and 2 x on-walls for the side surrounds all mounted vertically as designed.
