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Subject: Re: audio line specifications
References: <3DEE2757.EE79B063@crf.canon.fr> <3DEFD744.3A2D8C8D@gv.net>
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Date: Fri, 06 Dec 2002 11:04:11 -0500
NNTP-Posting-Date: Fri, 06 Dec 2002 11:04:11 EST
Organization: Bell Sympatico
On Fri, 6 Dec 2002 16:08:18 +1100, "Phil Allison"
>"Michael R. Kesti" wrote in message
>> Vlad wrote:
>> >Yes. The impedance of the line is NOT important.
>> The impedance of the line is not usually important, because audio lines
>> are usually shorter than the shortest wavelength in the audio band.
> ** Not again!! This is non relevant. If you need a ( twisted pair)
>balanced audio line to have a flat response over distances of 100 metres or
>more then correct termination of the line is important. If wavelength was
>the issue then it would not matter until 10 or 15 km.
And that is exactly why it is not important.
We use to have a "in house* rule that terminations are important when
the line is longer than ten wavelengths of the highest frequency of
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