Having been there in the 1970's, let me tell you there were a lot more poor sounding speakers then than now.
Some of todays cheaper speakers are much better than those from "good old days"
Hey, the Japanese were buying and listening to 1960 Altecs and not buying Japanese 1970's speakers.
The last thing I would ever contemplate is that good old 70's sound.
Now what coast did you prefer, East or West?
The speakers were so coloured that East coast were for light jazz, folk, classical(AR,)and the West coast rocked hard to JBL.
I think we have come a long ways .