bose 501 speakers

I am pretty sure the 301's were around then. A fellow dorm mate had them when I went to college.
I have to say, they impressed me then, but after college, I heard the Vandersteen's. I haven't looked back since.
B

I would have to agree with Lance on this one,all those Ess speakers were much better to my ears also during the day.I know several people that still have them going in my area even after all these yrs.

Kenny.

I have a pair of restored first gen AMT1's. Very respectable speaker in many ways. Vastly better than Bose and most others of the era. 

A good description of what bose is here https://www.youtube.com/watch?v=EQ6RM3XMfKg&t=1502s

@yogiboy is correct.  Bose made the 601's.  I owned a pair from 1978 until 1998.  First generation 601's were great speakers IMHO much better than the 501's.