Nick Boul has successfully hung M3 on-walls on the ceiling with FMBs. I’m trying the same. I will also try mounting them flush with my own bracket. On one hand you can aim them with the FMB. On the other, on-walls are designed to be mounted flush and tops are supposed to point straight down. I suspect that placement and ceiling height plays a big role in determining which method is better.
I’m also hanging M3 bookshelves for heights using a FMCB. To do this they actually hang sideways.
Note that Axiom needs to modify the inserts for either of those speaker to be hung that way. So, they need to know your intent when you place your order. Also, if you mod the M3ow inserts for the FMB they will not be usable with a T bracket.
