The height and the designated space for the sound bar as well the other components. 

Even though I love the unit, it was a very frustrating experience.  Your website description is not clear that the piece needs assembly. The piece had many damaged parts that my husband had to make repairs on before it could be completely assembled. I appreciated your associate Dominique worked out a refund, however I called her before I knew the extent of the damage. This piece really needs to be assembled by one of your technicans.