Lates 60s I bought JBL Dorian S12 after hearing a huge JBL system at a Dick Clark concert production at the Chicago Stock Yards amphitheater. I think I did listen to them at Allied Electronics on south Western avenue when buying.
Mid 70s I bought JBL L222 Disco after listening to them at a store north west of Chicago.
I still have both sets. The L222 are my active speakers.
Now for the ones I did not listen to but purchased. I was into collecting JBL at the time.
L25,L36,L40,L120,L300,AquariusIV,S1,4408,L65,L100,B380. Still have but not using the last 3.
If I had the space I would have really tried for a Paragon. 😊