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Of course......

Dan:

You're exactly right that you can't describe a cable except in the context of the source and load -- they make up a system and there is clearly interaction between them. It seems intuitively obvious that the cable as load has an effect on the source, for example.

You're also right that RLC parameters are relevant, and to imply that they are not is incorrect. IMO, the lumped parameters are important in a sort of "gross housekeeping" sense, since they will obviously have an effect on things like FR and amplifier stability margin.

However.....

To suggest that RLC measurements are ALL that defines a cable's quality is also clearly wrong, since there is no established correlation between those measurements and the cable's ultimate purpose, even if you include the complexity of source and load interaction.

Which means, IMO, that determining the relative quality of a group of cables based on RLC measurements alone is a pointless exercise, beyond the basic housekeeping measurements described above.

Peter

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