@jsd52756
"But I believe the speakers were ESS."
That period was what some of us who worked there sometimes refer to as the "old ESS" days. Some of the commercial and event implementations used the Professional Series line. Different design. More robust cabinet hardware, some with wave-guide type plastic horns in front of the air motion transformers, and pro series type woofers too for higher ppl levels IIRC. Not an in-home audiophile speaker, definitely more of a "loudspeaker". Would love to find a photo of the ones you are referring to, good old memories. :)