On these Wall mounts you want it waist hight and be sure you get the 2x4's on each end.You will need a stud finder for this.
TT wall mount height
Has anyone using a wall mount for their experimented with the height of the platform (from the floor). Obviously, too low is inconvenient, and if too high one can't reach. What about in between? Assuming the the mounting will occur "traditionally" behind and between speakers, near other components, what positioning has worked best for anyone?