Speaking of old vintage speakers. I have seen three or four pieces of this man's , Kelvin,videos.
Kelvin can be 100% trusted that he always chooses vintage speakers over new ones. New that he, by the way, extremely rarely likes.
100% subjective listening impressions. Sometimes interspersed with incorrect technical analyzes. It's almost like it's a parody of subjective HiFi yuotubers, but I think his videos are serious.
In his way of seeing it, serious that is.
Edit:
He thinks as he thinks about how speakers should sound. Of course he can do that, it's subjective.In any case, I do not think he is sponsored and is thus honest in his reviews.