Do materials alter frequencies and speed?

A 10 foot length of 12AWG Zip Cord is 0.1dB down at 20kHz into a 4 ohm
load.

This is waaaaaay below the threshold of audibility -- see reference above.

>>If it was true or factual in the least, i would remember it.<<

Perhaps you should write it down.

>>The fact that i've refuted your past arguments using your own reference
materials<<

Dude -- you've never refuted anything, you simply claimed that people who
disagree with you really agree with you, but don't want to say it. Since I do
not believe you are Kreskin, I hardly find this a credible "refutation."

The evidence shows you are talking about .1db at 20Khz -- waaaaay
below the level of human audibility and yet you continually refer to a "
roll-off" without specifying the amount, which I've posted for you and
given you references to charts. Since you've been given this information, it is
highly irresponsible for you to refer to a "roll-off" without
mentioning that it is .1db at 20Khz into a 4 ohm load. Completely
misleading. It doesn't take a rocket scientist to figure out why you leave out
this information -- because if you include it, most folks would simply chuckle
at the notion and your urban myth would die. You also have information
about the limits of human audibility and it is irresponsible not to mention this
as well. At least the guy from Empirical gives a nod to this. If you were
honest, you'd say it is .1 db down at 20Khz, that available studies show that it
takes a 3.05 dB change to be audible at those frequencies and if you still
want to press the point, you could say it is "debatable" or as the Empirical guy
said, "there is some question" about whether or not anyone could possibly
hear such a thing. If anyone could, he/she would reject all cables because
every cable has .1db variations over the audio spectrum, so there really isn't
any debate or question, but at least it would sound a little more credible.

I extrapolated the figures that i posted from the original data that you were referencing. According to that data, the zip cord showed a .25 dB drop just above 20 KHz at 8 ohms. There was no mention of results into a 4 ohm load there, so i have to wonder where you obtained the figure of .1 dB at 4 ohms. Obviously, these figures don't jive mathematically, so there is some disparity in terms of testing methods and / or materials used. Sean
>

>>According to that data, the zip cord showed a .25 dB drop just above 20
KHz at 8 ohms.<<

As usual, this is vague. "Just above 20Khz?" When you talk about
a .1 dB drop at 20Khz as if it is the Niagra Falls, who knows what "Just
above" means to you. But, even if this were true, .25 dB is still waaaaay
below the 3.05 dB change needed for detection WITHIN the audio band.

>>i have to wonder where you obtained the figure of .1 dB at 4 ohms.<<

From ----

http://www.audioholics.com/techtips/audioprinciples/interconnects/
SpeakerCableFaceoffp2.htm

Table 3 illustrates comparative insertion loss, total loss at 20 kHz, and
associated change in group delay within the audio band for 10ft lengths of
cables based on their measured RLC parameters all terminated into 4 ohm
loads.

Go there, look at the table, and you find that a 10 foot lngth of 12 AWG Zip
Cord measured .088 dB down at 20Khz when driven into 4 Ohms.

It's all the same stuff I've posted to you before.

I specifically mentioned 22 KHz at 8 ohms in my previous post. Is that specific enough for you? If it isn't, please refer to the article that you based your entire argument on. Other than that, anyone that can do the math should have been able to extrapolate the center frequency at 8 ohms based on the divisible factor of .5 as impedance is halved. Sorry if this is too complex for you. Sean
>