First impressions

[f1eng]

Actually optical still can support 24/192. It works on my D200.


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I think you are just lucky then. They are rated at 24/96 and some may work above spec.

When my first D-Premier came back updated to 240 specification, as was then, it would no longer play 24/192 files from my A&K portable. I did a bug report, the first response to which was puzzlement but a few days later I got an apologetic reply saying they had indeed downgraded the optical inputs.
They offered to make sure my second D-Premier, which was at that time in the workshop for update, would work with 24/192, and it does, so I have this one as my master now.
They did not say whether one of the higher spec D-Premier inputs had been fitted or if they had hand selected one of the new ones which happened to work above its rated spec.