I agree that rear, top, or bottom would probably be the desired place on the M3s to mount the wall bracket. As for a heads up on our bracket that is just now finished the design stage; it will mount to the rear of the M3s (and all our other bookshelf and quadpole speakers) and have the flexibility to mount to the wall or ceiling. The bracket also will allow for you to set the speaker in a multitude of various axii (etymologist spelling). Also the bracket will be able to be used as a short stand for placing the quadpoles on a shelf.
Ian Colquhoun
President & Chief Engineer
