It is version 2.

--- In Doepfer_a100@yahoogroups.com , Nicholas Keller <maq163x2@...> wrote:
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> Is it the torrid ring type (version 2) or the older black box type My old black box version 1 PSUs used to hum, but I've upgraded now.
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> Nick
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> On Jul 6, 2013, at 6:31 PM, "isoldeandisobelle" <isoldeisobelle@...> wrote:
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> > Hi gang -
> >
> > I have a 6U case and a 9U case, the 9U PSU hums (which changes in frequency when different modules are in use.) - the 6U does not do this.... is this ok
> >
> >
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> [Non-text portions of this message have been removed]
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