P.S. to my post above: Even if pins 2 and 3 were interchanged relative to the usual convention in the Aeris and the 625 S2, it wouldn't matter as the two reversals would result in the correct overall polarity. And that would continue to be true even if a preamp were inserted between them, assuming the preamp's polarity convention is the same at its output as at its input.
Regards,
-- Al
Regards,
-- Al