I don't disagree with all of the above, but I would add that The Doors LA Woman album for example is very listenable because in part at least it was not overmixed. Some of the old Chicago as well. I admit though my editions are remastered as well.
The vintage AR's, specificly 9's and little brothers, were not "hollow in the middle" but were set apart and easily distinguishable from competitors by their balance, midrange presence, flat frequency response and were not popular with the rockers. Point being that flat frequency response is not the only factor distinguishing vintage speakers from contemporary brands. The vintage AR's still don't hold up in comparison to today's audiophile brands. But if flat frequency response is the main consideration, get a pair of early 80's AR's. There are still plenty around.
The vintage AR's, specificly 9's and little brothers, were not "hollow in the middle" but were set apart and easily distinguishable from competitors by their balance, midrange presence, flat frequency response and were not popular with the rockers. Point being that flat frequency response is not the only factor distinguishing vintage speakers from contemporary brands. The vintage AR's still don't hold up in comparison to today's audiophile brands. But if flat frequency response is the main consideration, get a pair of early 80's AR's. There are still plenty around.