[Joe Garfield]

I just got a 20ft headphone extension made from Mogami 2893 and there's slight audible high frequency loss. Mogami claims approximately "23pf + 3pf + 4pf" per foot between shield and pairs of conductors, but then they say "40pf + 50pf" per foot in balanced quad configuration. To me that looks like 3x the capacitance, and would be 1800pf for a 20 ft extension.

Is there a way to wire this cable for minimum capacitance?

 

[tomb]

I just got a 20ft headphone extension made from Mogami 2893 and there's slight audible high frequency loss. Mogami claims approximately "23pf + 3pf + 4pf" per foot between shield and pairs of conductors, but then they say "40pf + 50pf" per foot in balanced quad configuration. To me that looks like 3x the capacitance, and would be 1800pf for a 20 ft extension.

Is there a way to wire this cable for minimum capacitance?

The additional resistance associated with that length is probably enough to cause the high frequency loss. 1800pf is only 0.0018uf, which is beyond trivial. There's probably more capacitance than that between the connector terminals. Just sayin' ...

P.S. Also wondering about your thread title - you reference "inductance," not capacitance.