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From: "Phil Allison"
References: <3DEE2757.EE79B063@crf.canon.fr> <firstname.lastname@example.org> <email@example.com>
Subject: Re: audio line specifications
X-Newsreader: Microsoft Outlook Express 5.50.4522.1200
Date: Sun, 8 Dec 2002 21:05:21 +1100
NNTP-Posting-Date: Sun, 08 Dec 2002 20:54:10 EST
Organization: Telstra BigPond Internet Services (http://www.bigpond.com)
"Vlad" wrote in message
> The source impedance affects harmonic distortion, intermodulation and
> response the same way it does to a speaker . The ratio between the
> impedance of a speaker or a headphone and the source impedance is
> called "damping factor"
> A pair of headphones or speakers connected to a an impedance of the
> same value . Example a 8 ohms speaker connected to an amplifier with
> an output impedance of 8 ohms has a damping factor of 1 and that is
> consider a very low quality system by today's standards.
> You only find that on low quality devices were maximum transfer of
> energy or spurious low frequency resonance is desired
> A good system today has a damping factor close to 100 .
> Yes, the output impedance of the amplifier is 100 times lower then the
> impedance of the speaker or in this case the headphones that in the
> majority of the cases are only miniature speakers.
** Mr W will be round shortly to deal with you ............ ;-)
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