Thanks again guys for the positive comments .....
Mark is absolutely correct in his reasoning as to why the Betsy baffles perform as they do. The "received wisdom" has always stated that the primary driver of a loudspeaker needs to be at ear level for a seated listener for the best results. By accident, I found that the dispersion pattern of the Wild Burro Audio Labs driver produced a stereo image and soundstage that "floats" above the baffles ..... even though they are only 22.5" tall.
The floor does indeed reinforce the upper bass and lower midrange frequencies which has pretty much the same effect as if the drivers were mounted on a much larger baffle with the driver positioned at "ear level".
An additional benefit is that some of the "beaming" that full range drivers are (in)famous for is reduced because it makes the dispersion pattern slightly off axis.
Some of my customers use cones or spikes under the fronts of the baffles to tilt them up if they feel the need for a little more top end response.
As usual ..... your mileage may vary.
I have literally built dozens of open baffles of various sizes, shapes and configurations. A couple of them were total opposites of how the current Betsy baffles turned out .....
These speakers were pretty impressive sounding, but after making the first pair of the current "low boy" barrel shaped Betsy baffles, I never looked back .....
Happy listening,
Randy