When I got started in earnest in this hobby, say in about 1971-72, the younger hobbyists regarded horn-type speakers as outmoded hold-overs- A-7s were still used for sound support at concerts, but not considered quality stuff for hi-fi and the Klipsch was regarded as an historic anomaly- sort of like seeing an interesting car from the 40s or 50s go by on the highway- cool, but not sure you'd want to drive one regularly.
My first real encounter with the big K horn was a little later- in about 1979- an older neighbor had a pair of corner horns being driven by mono Marantz tube amps, Marantz 7c preamp, think he had a Thorens table (that was pretty decent then).
Big, wide sound, did some bass, but a different kind of listening- the fact that they were like 35 feet apart, in the long corners of his room, didn't make for a soundstage since the rest of the room was too shallow by comparison, and you didn't really get much of a stereo effect.
At that time I was fully committed to my old Quad ESLs, so something should have told me that old tech might still be good tech. While I was aware of the experience in the Far East, it was largely anecdotal, I couldn't do anything other than look at the pictures in the Asian hi-fi mags, and there wasn't a very strong movement, even in NYC at that time- other than the Futterman thing- which tied to electrostats- to use arcane tube amps and something other than conventional monkey coffins.