The Duntech Princess had Dynaudio woofers and tweeter and Scanspeak mids. I believe all of John Dunlavy's designs utilized 1st order crossovers because of his belief in time and phase coherency. They also had a wmtmw driver array to simulate a point source but they were not D'Apolito design...
As a previous owner of Duntech speakers I came to know something of both Duntech and DAL. Hopefully I can fill in a few blanks here.
John Dunlavy's first Duntech speakers were built in Texas in the 1970s. I believe they were designated PCL-15. That model was reviewed by Burt White in Audio...