Different length digital cables all true 75 ohms?

Thank you Al for clearing that up for me. I guess I don't have to worry about it, unless I suppose it was some stupid long length cable.

I was thinking about your last statement regarding the square root of a cables inductance divided by the capacitance gives the impedance.

Many high and low end cable manufacturers will use the same cable that they use in their interconnects and speaker cables in their digital cables and are probably not 75 ohms. I wonder how many actually make the effort to alter the cables inductance capacitance or inductance to make it 75 ohms.

Also how many audiophile cable companies actually use near true 75 ohm RCA connectors. I understand some of the pedestrian cable companies actually use Canare RCA connectors which are regarded as near true 75 Ohm. However when I read the product description of many of the high end companies description of their digital cables, for some reason they don't describe the connector.

Yes, it makes one wonder.

I would expect that the significance of the connectors being close to 75 ohms, as they are with the Canare's, would be subtle, and would probably be insignificant if the dac has good jitter rejection capability.

If the cable had a characteristic impedance significantly different than 75 ohms, though, that would figure to be quite significant.

There are lots of system dependencies involved, though, which can obscure or overshadow the differences. Quoting from myself in another thread from a couple of months ago:

Digital cable performance is dependent, among other things, on the length of the cable; the accuracy of the impedance match between cable, connectors, transport output circuit, and dac input circuit; the data rate of the signal being transmitted (44.1 or 96 or 192 kHz, etc.); the jitter suppression capabilities, if any, of the dac; the integrity of the shielding in the cable; the risetime and falltime of the transport output signal; the ambient noise environment; and other factors.

Regards,
-- Al