Hi..when mounting a playbar above a TV. The depth of the unit is 85mm.. when using the mounting kit, how much extra does this add to the total depth. I.e. How far from the wall is the front of the unit? Second question, I have seen the playbar recessed in a wall and like the idea of hiding the playbar behind a custom grille. Any thoughts on what clearance should be allowed around the playbar to avoid ruining sound quality?