Coax to BNC connection for digital

Thanks Al. The DAC I have purchased, however have not yet received, is the Mirror Audio Tubadour III. It has a BNC input along with USB, toslink, and coax. Currently the coax will serve my CD transport, toslink my DVD player, and thinking if I get a server I will use the BNC. I will verify the impedance for the BNC connection for the DAC and find a impedance matched server, when and if I follow that route.  

As an additional thought, I could use a coax output from DVD player with RCA cable and a RCA/BNC adapter as opposed to a toslink cable. Thoughts anyone?

That should work well, Mesch, assuming the BNC input is 75 ohms (as is likely) and not 50 ohms.  Also, it would be preferable to use an adapter specified as 75 ohms, such as the one I linked to earlier.

Best regards,
-- Al

Thanks again Al for your help! That said, I am embarrassed in that I was mistaken about the additional input being BNC when in fact it is AES. My only excuse for my confusion is that I haven't received the DAC yet, a poor platform indeed. 

So I now must explore the subject of going from a coax RCA
 output to an AES input. 

I still can't believe that in my mind I replaced the AES outlet available on the DAC with a BNC one. AT 70 I feel I am in good physical shape, however my mind may not be keeping up.  

After some exploration I believe I am best off looking for a streamer/server with AES output and use appropriate 110 ohm XLR cable. This will be a 'down the road' investment.