My thoughts are.....you are nuts. I would not mount these flat on ceiling. That's a lot of pressure on that one little screw. Actually, you would have to screw 4 screws into the back of the on wall because there is no mounting point built into the M5 on walls? Secondly, they are massive overkill for ceiling speakers.
Last edited by Newf; 06/27/17 12:02 PM.