I think it was about 1962 or 3 My uncle, who was a big HiFi fan, had just picked new set of JBL C-38's. I remember the blast of that 15" D130 woofer. The way it moved the grille cloth and how you could feel it moving the air. The JBL's were driven by Sherwood tube separates. Man that was it. Not to long after that my Dad got us a set of those C-38 JBL's and that's the sound I grew up with. If it didn't sound like that it wasn't any good. Our JBL's were driven by Fisher tube gear.