SUT - electrical theory and practical experience

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Somewhere behind all the above that coming together in one permutation or another is Math. It is quite difficult to see where the individual place much care on the Math that is not the commonly used criteria for matching a Device to another Device.

The Topic of Math most recently under discussion and now dominating as a Spoiler, is as far to the extremities and circumscribed in content, as can be imagined, when comparing the content to the OP's original request for information.

Respectfully I’ll offer an alternative…

The section with the URL link on “the gain of SUTs” had some compelling maths that to help to show how some SUTs may be a better match for some carts.

I would say that that “linked info” falls squarely within the second paragraph of the OP’s ( @drbond  ) question.

Para2:

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Assuming an appropriately / ideally matched SUT and MC, What are the inherent advantages or disadvantages of inserting a SUT after the MC in the audio chain?  Does the SUT theoretically enhance or degrade the sound quality?  What does the SUT actually do to the sound quality? 

Even the OP’s first paragraph mentioned wanting to understand the theory behind a SUT. So the beauty of Maxwell’s equations sort of is a real manifestation of scientific understanding becoming an engineered product.

While many an end user may not want to understand it, and would rather have a recommendation of one particular SUT and similarly one specific cart… it is none the less a true thing of beauty how both the cart and SUT work.
There is more science and math in it than magic .

But the OP can (and should) certainly drive the conversation in a way that helps them.

+1 @fuzztone …..it’s about gain, simple.  

@rauliruegas

just read your own posts, preferably before posting!

@lewm,

Not to take too much of a tangent from the intent of this thread, but this article should clarify sound intensities in watts per meter squared with the more commonly used sound intensity levels in decibels (dB) - Sound Intensity and Sound Level | Physics (lumenlearning.com).

Take care and best wishes for the holidays,

I do agree, it is for the OP to steer a thread, if the content of it is developing into a discussion beyond their needs and seen to be best kept as a separate topic.

The Topic makes a lot of sense when maintained in a area where the Science in use has a Audible to the Human Ear function.

It looks like Bats are being catered for in the frequencies being presented and being a outcome of a Theorem presented.

This Thread is now about Theorem and whether one version is able to be proven superior to another, even thought the condition under discussion may not even be audible to the Human Ear, and certainly most unlikely to be audible to the individuals Spoiling the Thread with the attempts to maintain the Math as the important area of discussion.   

If I was a visitor to this thread, my first thoughts would be to question the understanding of the Theorem being presented by those who are enforcing the subject to the forefront.

I don't trust many views presented on Math, as there are those that can read it and comment on it, as their interpretation, and there are those that produce the Math. The producers of Math that has become Theorem, are quite a different being to a interpreter of a produced Math.