I’m on the hunt for a driver that can produce full range sound so that I can build a reference speaker for my bench measurement setup. Why a single driver? No crossover, no inherent phase issues, no time alignment discrepancies, etc…For this purpose, I am considering the Aurasound NS3 193 8a:

partsexpress.com – AuraSound NS3-193-8A
AuraSound NS3-193-8A Specifications PDF

Below is a link to a white paper PDF that explains the technology used to manufacture AuraSound speakers. Well worth reading…

AuraSound NRT Whitepaper PDF
aurasound website