I cite again the Toole paper in the June AES Journal, 26 pages, as I recall.

He outlines the why and how it is only possible to "tune" for bass for a limited seating area in a listening room.

The next row back will experience it differently, invariably.

He also covers the importance of controlled directivity and power response.

The prespective is interesting - the applicability of system design for large performance spaces to typical listening rooms.

This paper alone is worth the price of AES membership....