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There is another very good article with the simple resistors conversion network.

http://www.epanorama.net/documents/audio/spdif.html

Still, I would like to make it “kosher” and have ordered the double adaptor with a transformer from RedCo:

http://www.redco.com/shopexd.asp?id=337

There are also some obnoxious “brutal force” cables, pay attrition the are 18” long…

http://www.lynxstudio.com/cables.html

I am familiar with what Lavry thinks on the subject and am defiantly will try it. Still in his unit his put a separate transformer isolated SPIDIF input with a separate gain stage specifically to EQ the voltage of SPIDIF and AES/EUB… Well, I think I am becoming overlay anal retentive….

Anyhow, I remember there was suggesting fromCharles Hansen of Ayre Acoustics:

On paper, the S/PDIF standard is 75 ohms and the AES/EBU is 110 ohms. On paper this represents a 32% mismatch. This sounds like it might be a problem, but it really isn't. When there is an impedance mismatch, the signal is not transferred 100%. Instead some of the energy is reflected back the way it came.
Now, if you put an adapter at the output of an Ayre and use a 75 ohm cable and the receiver is properly terminated at 75 ohms, there won't be any problem. There is no reflection from the adapter because the physical dimensions are so small relative to the wavelengths involved that there isn't even a "characteristic impedance" at that point. Then, at the far end, the wave traveling through the cable is absorbed by the receiver.

If there were an impedance mismatch at the receiver, then there would be a partial reflection that would travel back upstream to the Ayre. Now the impedance mismatch at the Ayre would cause another partial reflection of the partial reflection that would travel back down to the receiver. This partial reflection of the partial reflection could add some "noise" to the edges of the signal that could cause some small amount of jitter in theory, but this happens only if there is a mismatch at the receiver end as well.

In practice, this is the least of your problems. In practice, you will find all kinds of things that matter that shouldn't from a theoretical standpoint.

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