I wonder, has anyone ever measured this driver.

VMPS uses a modified version of it in their ribbon speakers.
It is said that some Drago guy modifies the drivers for them, but maybe the driver is OK as is ?

There are zillions of these computer speakers popping up used on Ebay.

Anyone got the low down on this driver.

I know the Inventor of it Bruce Thigpen abandoned it for a newer design driver he uses in his current speakers.

Why don't I see anyone but VMPS using this driver ?

In fact, I have never seen it even mentioned anywhere in a Line array discusion.