On Sun, 19 Feb 2017 06:32:04 -0700, Paul wrote:
"The issue of frequency-response degradation in cables is sometimes
brought up, and while there is a small potential for a cable to do this,
the problem is largely immaterial except when dealing with extremely
long cable lengths. It takes close to four hundred feet of cable to
produce 1 dB of attenuation at 20 kHz (nominal), which in most live
situations, is virtually inaudible."
This I did not know!
Thanks! 
This is where simplistic cables models fall over. Four hundred feet of
cable is enough that at 20kHz a real, distributed model will give a
correct answer, but the lumped C/L/C model has failed. Four hundred
feet of typical 300 ohm mike cable connecting a 150 ohm mike to a 1500
ohm preamp will actually result in about 0.25dB RISE at 20kHz, not a
drop. The reason for this is that at high frequency the cable is
starting to act as a transformer, slightly improving the match between
150 ohms and 1500 ohms.
d
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