It looks like Hegeman used old cigarette butts as damping material and glued them on his woofer cones in one those pictures?
I got a set of 1/4 wave tuned pipe speakers that have a single "full range" driver firing up at the top. It uses a clear plexiglass baffle over the driver to "aim" higher freq out towards the listener. It actually sounds pleasant. Sort of a point omni source except I should probably replace the flat baffle with a ping ping ball or something? These were placed in the waiting room of my wife's office and connected to a PeachTree integrated, system is used for background music.
I would think this type speaker would make greater demands on room design and placement (like corner horns)?
brombo wrote:
Has anyone in the group tried to build Hegeman or Morrison type speakers -
http://www.roger-russell.com/omni/omni.htm#oneahttps://www.morrisonaudio.com/My math teacher in college has a system with Hegeman speakers, Mac Intosh integrated amp, AR turntable, and a Weathers cartridge. Back then (1968) it sure sounded good to me.