bose 501 speakers


hi everyone, any thoughts of this speaker from the 70's? I believe that during the 70's bose only had the 901's and the 501's.
128x128g_nakamoto
I considered adding a pair of 501's to my collection - but I already have too many vintage speakers!
I walked into a Audio store around 1976 and had every intention of buying the Bose 501. I knew what I wanted. When I told the salesman he said sure but you should listen to this pair of ESS speakers for around the same price first. Well there was no contest and I left with the ESS. That salesman knew his stuff.
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