The cabinet doors have speaker mesh for panels to allow the audio visual components an opportunity to vent and stay cool. This also allows the client to access the components via the remote control. The wiring is kept hidden by special chaseways built into the piece.
Who said basements have to be cold and drafty. This basement was finished to include a wet bar, large screened tv and card table area. See additional photo for what to do under a staircase, how about a walk in wine cellar.