Do materials alter frequencies and speed?

Rsbeck -- "dynamics" are energy related. Lossy energy transfer can impact.
Frequency response measurement is time-related.
As to the evidence etc & alia, I believe Aball answered your questions, above. Cheers

This is you vs. a solid century of scientific principles, math and logic

--a small point: a logically acceptable syllogism is not necessarily materially correct.

Surely you're not saying that one should use pure logic to extrapolate within the realms of a scientific experiment --OR the other way round.

You're probably not saying that; I would leave out logic as the means to explain the materially correct and join, say, Aball's efforts (see experiments above, albeit at RF).

OF COURSE it would be VERY refreshing, useful and (to say the least) welcome to have reliable data on how materials & connections affect electrical transfer, etc, in the not-so-important ~16-50kHz (or thereabouts) range.

To challenge s/one with a blank "prove it -- or it doesn't exist" statement doesn't always lead to useful results, does it? It could be a short... so to speak:)

As in the old Soviet paradigm, where one "comrade" accosts another civil servant comrade, asking for special visa to leave Moscow. All sorts of papers are presented, and the civil servant says, "where's your birth certificate?". "Why do you need a birth certificate, I've given you all the papers and I'm standing in front of you -- I exist!" The civil servant answers, "I need a special document to prove you exist". Cheers

In fact, there IS a very simple cable wire experiment. Take an appropriate length of enameled pure copper wire (~16g), cut into four identical pieces, scrape off enamel at the 8 ends, and use that wire to connect amp->spkrs. There should be a perceptible sonic difference if you're now using multistrand wire. You can even connect these wires in the direction they come off the spool, or cross, or whatever floats one's boat:)!

What is the resonant frequency of earwax

:>)Dunno, but there's a pole s/where around 15kHz if I remember correctly. With your "direct-line" method, maybe we can dispense with the riaa correction altogether...