Yes Virginia there is a suggested room size for the Khorn.
Mr. Paul in a technical writing titled "Room Dimensions for Optimum Listening and the Half Room Principal" (dated Aug 1955)states the following:
1) In designing a new house, the music room should be planned with a 32 foot diagonal, or as nearly that minimum as expedient. It is suggested that the ancient "golden mean ratio" apply with, for example, a length of 27 feet, width of 17 feet, and a height of 10 feet, or some reasonable and feasible approach to those figures as in figure 2. This "room" is the limit of the ratio of adjacent terms in the Fibonacci series. The application for either single speaker or stereophonic would be good in a room of this size and shape."
*******
"Therefore, the design of new homes should be based on provisions of corners for speakers, and the application of existing rooms for wide-range sound reproduction should be based on the use of corners even at the expense of remodeling if necessary"
The article goes on to state that the speakers should be placed along the 27" wall for maximum imaging and so the bass note can more fully develop.
Mr. K also is a proponent of a center channel speaker (Yes, it started way back then... its not a new principle just for home theater) to improve imaging - to have a curtain of sound.
Soooooo, I don't remember who said it here on the BB, but it went something like this....
The most expensive component of my stereo was the purchase of the walls for my Kornerhorns.....