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The entertainment center was built by Fauller Woodworking, located in Metro-West Boston.
They are the custom millwork shop which produced the drawings and constructed the wall unit.
I do not have the drawings of information on file for the wall unit, to to answer your question.

The information related to the room may help.
The space between the French doors is 8'-0".
The overall ceiling height for the room is 11'-0".
The soffit height is 10'-0" and 2'-0" deep.

You can contact them directly on the information related to the size of the monitor and additional information of the custom wall unit.
This photograph is from the family room of newton residence -2.
The home page for Matt is faullerwoodworking.com