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Music servers and other computer based digital audio technologies.

RE: Why?

Valid points. If the wiring inside the converter or DAC is not a good low-loss short 75 ohm cable terminated well to the BNC and going directly to the driver/transformer or to an impedance-controlled 75 ohm connector and 75 ohm impedance-controlled traces on the board, the 75 ohm BNC jack is worthless. If the output impedance is not 75 ohms or the input impedance is not 75 ohms, also worthless.

I personally have found even optimizing all of the above, the cable shield termination to the connector is still the biggest challenge. The discontinuity here seems to be very important. I have found that if you can get this right, then a BNC terminated cable does make a big difference in SQ, even using BNC-RCA adapters on one or both ends. After a lot of experimentation, I think I finally got this right.

On the other hand, using a BNC to RCA adapter to an RCA terminated cable is a non-starter IME. Performs poorly compared to the BNC-terminated cable.

Steve N.


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