My disapointment was with the coax which was obominable at the crossover. There single diaphragm drivers are about the same as everyone elses.

I am not aware of what 18 sound has done, I worked with B&C. Perhaps my work leaked out, but thats OK since the concepts are patented so it won't matter how they got the idea if its the same as mine.

I have found that most claims in this biz are meaningless. Big claims, little difference.