One other difference between these models has nothing to do with sound, but is probably worth noting.
One of the factors that allow us to market these speakers at $1500 is that, in its standard configuration, it will only be available in a limited number of finishes (maple, cherry, walnut, black satin and, for a limited time, honey locust). This will allow us to produce numerous cabinets at the same time and, thus, be more efficient.
The other speakers are built one-at-a-time in your choice of finishes.
Of course, if you wanted SongTowers in bubinga, that would certainly be doable. We'd never say no. They would just cost more.
- Jim