Back in '72, I was privileged to apprentice with a reviewer for the Absolute Sound. Frank Richards of Raleigh, NC since passed away, but I carried away a lot of interesting information, including having heard Stu Hegeman's first omnidirectional speakers, as well as the first Shahinian Obelisks.
The Hegemans, I remember, had the forward-canted top baffle and the Philips tweeter, which I used for most of my earlier designs, myself. The Hegemans left a lasting impression with me, as did the omnis that preceded it: the Ohm Walsh speakers.