This was a lot of work and wanted to share the results with the Forum.
I was involved in a Beta test program with the Fostex 125wk; in a cabinet called a Fonken (see Fostex Pic).
The Beta testing involved 9 cabinets/builds, too small, too big; it took a few tries to get it right. The final cabinets ended up being in the middle of the pack, so on the right track all along.
Full range drivers are typicaly associated with tube amps, however these are so well tuned/wonderful I'm using a vintage 100watt Rotel (typical A/B amp) to drive them and enjoying every minute. All of a sudden my old favorite 2ways are being shrink wrapped and stored.
One of the builds was the plans-from-the-box (9 liter BR box), that was not very impressive. There is some magic going on with a Fonken.
The fellow that has been designing the Fonkens family (for many, many, years) can be contacted at:
btw, here is a link to the Fonken Family: