I just looked at the audio archive page, it is not reliable, I found several mistakes on it in a casual read.
MKII firmware can be applied to MKI machines (done it several times)
it has a few minor differences that apply to the old deck and are useful (timing and damping differences in control loops for motor control) that also require changes to some of the control cards (all denoted on SI's from Studer and available)
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HXPro is only really useful at slow speeds .... Not that useful to the audiophile, are you really worried about recording at either of those speeds? I think not.
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Skimming ...Now I walk up with THE master of (insert name here) and you want to run some bias thru the record head while playing this tape? Not gonna happen.
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The changes are in the audio cards....
In other words, no real changes that anyone here would care about that can't be added to a MK I machine.
Cheers
Alan
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