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Caution: Do not switch power off and on rapidly, as this interrupts the
normal power-up sequence. We advise waiting at least five
seconds between power cycles.
2. Digital Outputs
These outputs provide digital audio signal (DAS) via cables
equipped with either XLR-type or RCA-type connectors to a
digital audio processor.
The XLR output conforms to the Audio Engineering Society/
European Broadcast Union (AES/EBU) professional digital
audio standard, which calls for a 110Ω transmission of the
DAS. Use a digital interconnecting cable specifically designed
for the 110Ω AES/EBU standard when using this input, with
pin assignments as indicated below:
Pin 1: Signal ground
Pin 2: Signal + (non-inverting)
Pin 3: Signal – (inverting)
Connector ground lug: chassis ground
It has been Mark Levinson’s experience that the AES/EBU
interconnection standard offers the best quality of all digital
transmission interfaces when fully optimized, and we
recommend its use wherever possible between Mark Levinson
components.
However, optimizing any electrical digital interface completely
represents a significant engineering challenge. It is entirely
possible that a different type of input may actually outperform
a less-than optimized AES/EBU implementation on some
brands of digital components. For this reason, we have gone
to great lengths to fully optimize both of the digital outputs
on the Nº390S. If you are using your Nº390S with a different
brand of processor, we recommend experimenting to determine
which type of input on that component results in the best
audible performance.
The RCA output provides digital audio signal (DAS) via cables
equipped with RCA-type connectors to the digital processor. It
conforms to the Sony/Phillips Digital Interface Standard
(S/PDIF), which calls for a 75Ω transmission of the DAS. Use a
digital interconnecting cable specifically designed for the 75Ω
S/PDIF standard when using this output.