Some quick questions for my technically-minded friends. So how would one likely implement a high/low impedance control on an OTL amp like this? And how much of a performance advantage is it actually likely to afford with low-impedance headphones over the stock configuration? At the NY meet, I thought the stock Zana sounded very good with HP-1s, though I know the combo wouldn't necessarily be considered a great match on paper.
Ah theng kyew.