Originally Posted by
Pharos
First of all I apologise Arkless Electronics and Rothwell Audio if my abbreviations have caused offence; that was not intended,and perhaps a bit lazy of me.
In post 45 there seems on reflection to have been a divergence on the point being discussed.
You went on to talk about clipping, a subject I was not considering. I was thinking about distortion originating within an amplifier quite other than clipping, perhaps giving the impression of greater dynamics.
What I had in mind was the peculiar results I had with my old Nelson-Jones 10+10 on one particular track by Michael Hedges. Its effect was to somehow hype and increase the sense of attack of his guitar, and in a way I have never again heard on any other system. That may have been interpreted as sounding more dynamic.
Regarding impedance match, the standard used in telecoms and in broadcasting was 600 ohms, this from transmission line theory, but it may have changed. It was based on maximum power transfer theory and avoidance of standing waves and reflections. I remember drawing the Gaussian graph of power transfer at college.
We have 75 ohms for FM aerials.
I remember at that time, about '75, arguing with my telecoms lecturer when we introduced audio amplifiers into the source/load matching discussion, saying that with audio amplifiers we are not interested in power transfer from source to load, but that we are interested in voltage transfer to load, which we want to maximise.
I think your post 67 Rothwell Audio gives a very reasonable postulation, and it probably agrees with my 'Hedges experience'.
Punctuation can improve communication and reduce ambiguity.