Master/slave link

[Mikeeo]

Hi Ian,

Makes sense what you say about the balun on the AES/EBU input as long as the settings acknowledge that it is a link between Devs (75 ohm) or a non-link digital source in (110 ohm).
But for those like me that would like to use a 75 ohm dig out and the 110 ohm in from a digital source I guess the system will not know anything else than a 110 ohm as I haven't seen any setting for the input AES/EBU that would give me the choice of 75 or 110 ohms, or does this exist?
If not, at least I would need my connection from my Unitiserve to change impedance before entering the Devs 110 ohm input.
Well it is not hard to make your own balun as it takes one Lundahl 1574 transformer between a RCA/BNC and XLR, voila! maybe I should test that first and see. I can always cut out the transformer and compare or the opposite

However buying all the diy stuff will be halfway the cost of Audioprana, so...

Cheers/Mike

Hi Mike

Yes, my reference is purely to the configuration setting which, through the link, can use RCA out 75 ohms to XLR in 110 ohms and my conjecture, seemingly confirmed by Devialet, that they include a compensatory balun put in circuit when the configurator is activated in this way.

To the best of my knowledge, there is no way to get a digital XLR output from the Devialet, and I have not tried tricking the unit into providing a digital RCA output by configuring for dual mono but then not linking - I suspect it would not work. If one wants to use the XLR digital input on the master, then I guess that is 110 ohms as the industry standard to match the output from your source which should be to the same standard.

But as far as I can see the Unitiserve digital output is S/PDIF 75 ohms, BNC or Toslink, so you would not want the XLR digital input anyway? Likewise my CD Xt signature is optical or coaxial (no XLR). My older transport, an Audio Synthesis Transcend, now in storage, has all five serial digital interfaces fitted - 75 ohm BNC and also RCA, 110 ohm XLR, glass optical AT/AT&T (eliminating impedance matching requirements) and Toslink; plus some proprietary codings for which one needs the partnering Audio Synthesis DAC. At some stage I might dig this out and be able to try immediate comparisons ...

Regards,

Ian

Ian,

For the linking duties I am in no doubt then that Dev, as the claim, has a balun taking care of this due to config, However Thierry also recommended me to use the AES/EBU input on the master hence it is a better input. From this connection I can't see how the system could recognize the Unitiserve 75 ohm output without an auto detect function!? So I guess using the AES/EBU is a compromise that is still better than the S/PDIF input. Here I definitely see a possibility for the 75 to 110 conversion.

Cheers/Mike