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Posted to rec.audio.opinion,rec.audio.pro
Arny Krueger
 
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Default mic cable inductance


"Robert Morein" wrote in message
...
Although cable capacitance is not an issue with low-Z mikes, Pro-Co Sound
claims that series inductance is an issue. Quoting from
http://www.procosound.com/downloads/mic_guide.pdf


"While parallel capacitance, the enemy of highfrequency
response in high-impedance instrument cable, is largely insignificant in
low-impedance applications,
series inductance (expressed in microHenries, or uH) is not. The
inductance of a round conductor is largely
independent of its diameter or gauge, and is not directly proportional to
its length, either. Parallel inductors
behave like parallel resistors: paralleling two inductors of equal value
doesn't double the inductance, it halves it.
In cable construction, using two 25 AWG conductors connected in parallel
to replace each of the conductors of
a 22 AWG twisted pair will result in the same DC resistance, but
approximately half the series inductance. This
will result in improved high-frequency performance: better clarity without
the need for equalization to boost
the high end."


I cannot dismiss this,


By now, you should.

I think that several have already pointed out that moderately long mic
cables (100s of feet) just aren't a problem, and that in use, mic cables
tend to perform about the same.

The most obvious performance characteristic of mic cables is simple
integrity. Mic cable is fairly well standardized, as are the connectors. The
major controlling factor is quality of assembly and soldering.


 
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