It really desn't matter whether pin 2 is positive or pin 3 is positive in reality.
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If you're balanced source to amp, you have to maintain the correct phase, but if the signal is converted to single-ended somewhere in the chain, then it doesn't matter, no?
A player modded to the "correct" polarity would be worth $50 to me if it was a high quality job. When you switch cables around enough that last thing you need is a "special" component.