CSDs for four different LCD3s - from most veiled to least veiled

Attached are four LCD3 CSD plots in succession from least subjectively most veiled to least veiled. Note the ringing on these measurements has been exaggerated. (These are "open air" foam coupler measurements. Sealed measurements, which are more reflective of what we actually hear, results in the ringing reduced to below -25db. This phenomenon seems to be an ortho effect and does not apply as strongly to traditional dynamics.)

I don't know what can be arrived at these measurements other than the faster and clearer sounding iterations have the resonance at higher frequencies. Could it be greater tensioning of the diaphragm? [More experiments on this later.]

The first plot was of an LCD3 which was obviously veiled. The second LCD3 also sounded quite veiled, but not as much as the first one. The last two plots were un-veiled LCD3s with one sounding just ever so slightly faster than the other.