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In article <oduNdSC00UhB81Orc1@andrew.cmu.edu>, rc4n+@andrew.cmu.edu (Raymond C. Chick) writes:
   > I record classical music and have recently begun to investigate the
   > affects of cable resistance on mic. level audio signals.  I used two
   > cables, one about 20' and the other about 350'.  I passed identical
   > signals through each cable and measured the  outputs levels for various
   > frequencies.  I found no difference in output level between the two
   > cables for frequencies from 100Hz. to 16Khz. Yet, the restistance of the
   > short cable was .5 ohms and the long cable was 5.5 ohms.
   > 
   > Shouldn't the long cable attenuate the signal or even roll of the high
   > frequencies?

Most hifi equipment has impedances much more than 5 ohms, and will probably
swamp such a small difference.

The inductance/capacitance of the cable will have a much greater effect. Try
applying an accurate 16Khz squarewave at one end of the cable, and look at
it on a 'scope at the other. Chances are it will have become slighly
rounded at the corners, since the different frequencies will have been
delayed (phase-shifted) by different amounts.

Steve