Here's a FERTIN 20ex -surroundless-full range driver: 2250$ each driver + transportation.
The Fertin 20ex model 7 uses carbon wires in place of the rubber surround. This frees the driver from external constraints
and enables it to follow the current information fed by the amp. Because of this, the FERTIN 20EX model 7 can reach very high
acceleration factor (732) unreached by other drivers. In a bass-reflex cabinet the model 7 goes as low as 25hz and as high as 20khz.
You can use it also in open-baffle. For more info , you can contact me..........gilles
