Coax to BNC connection for digital

Thanks all for the this information. You have answered mine main concerns, regarding having a cable made, if there were adapters, and the issue as to 50 vs. 75 ohms service. I do have 75 ohm RCA cables and will will most likely look for an adapter. 

Given the DAC has BNC, should I purchase a server with BNC output I would  then just purchase a BNC cable which I suppose would need be rated for 50ohms. 

Forgot to edit..my main concerns.

Happy Holidays to all!

Given the DAC has BNC, should I purchase a server with BNC output I would  then just purchase a BNC cable which I suppose would need be rated for 50ohms.

Hi Mesch,

The output impedance of the server, the input impedance of the DAC, and the impedance of the cable should all be the same, or there may be adverse sonic consequences that are equipment and cable-dependent, and that are essentially unpredictable.  BNC outputs, inputs, and cables used in digital audio applications are often 75 ohms, but are 50 ohms in some cases.  It would definitely not be good practice to connect a 50 ohm output to a 75 ohm input, or vice versa, although in some circumstances doing so **might** happen to provide reasonably good results. 

Best regards,
-- Al

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?