When I place a late, paper label DD record with a bold vocal track on my A-250, at the moment the voice begins, my dog launches into barking the same as if someone's just come to the house. It takes some effort to convince him that no one else has come in. He doesn't do this when I play something similar on my Victor Credenza, or any other machine.
This doesn't quite address the criteria of the original query, and it's not exactly his master's voice, but he does seem to have a feeling for the most real sounding phonograph (and he has unusually sharp hearing to boot). Perhaps it's because the Edison system has the most natural overtones? Andy Baron
