At your risk.
Today in a dream maybe at 4 am.
It looks like a drive unit in a UHER Report tape recorder but mounted on the other side so that it points to the higher dimension of the box. It is also mounted at 45 degrees so that it points to the listener if the tape recorder in on a table and the listener sits on a chair.
So the enclosure is really a parallelepiped box of 45 degrees and low height.
Does this speaker avoid early reflections to the listener?
Same principle as Crown pressure zone microphones (PZM), or boundary microphones.