S/PDIF coax to BNC

I have an m-scaler to convert USB to BNC.  Before I got the m-scaler I used USB.  The USB on the DAVE is excellent.  I don't know about eh CNX but it isn't really in the same class as the DAVE anyway so you might consider upgrading.  

to make sure I tell the whole story, I've bought a Grimm streamer and a Lampizator DAC and will be getting rid of DAVE and M-scaler.  

Jerry

I agree they are not in the same class but I just bought the Dave so would prefer to get a bit more mileage from the streamer before I switch.

I've used a Black Cat Silverstar digital cable for many years.  It comes with BNC to & RCA adaptors that work seamlessly. A great cable at a reasonable price, with the flexibility you are looking for.