In Reply to: Why? posted by Thorsten on February 14, 2014 at 07:31:49:
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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Follow Ups
- RE: Why? - audioengr 12:08:29 02/14/14 (4)
- RE: Why?I concur - fmak 01:53:33 02/18/14 (0)
- RE: Why? - thom70 00:43:25 02/16/14 (2)
- RE: Why?For me - fmak 02:00:06 02/18/14 (0)
- RE: Why? - audioengr 10:46:16 02/16/14 (0)