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I have a bit of Audioquest in the haus and actually sort of knew one of their founders briefly through a roommate decades ago.

In the car I am using Magomi and Neutrik’s ProFi RCAs,… which i get from Markertech. I suspect that all the brands mentioned by Aryton would hard to distinguish from each other in real-life. (but at least they look different)
 

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Here is one of the better DIY RCA articles I have come across

 

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The easiest way would be one set of RCAs into a summing (differencing) amp, and the ones being tested into the side of a differencing amp.

Then one gets the difference between the two setups.
I've got a DATSv3, that's how I tested it before (measuring inductance, capacitance, and impedance), but that was just 1 rca. And I forgot to do the test this week, maybe in the next few days.
 

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What is the mechanism causing this?

I am pretty sure that the inductance formula has the area and number of turns being the main contributors. And in the twisted pair that area gets reduced from the pairing... and then reduced more with the twisting.
Here you go. I didn't have a spare 12 foot coax rca so I just tested the Stinger 4000 series 12 foot rca's (twisted pair). The coils were about 3.5 inches in diameter, so about 13 or 14 coils. The first picture is with the cable straight, second is coiled, third is coiled but tested in a way that simulates a balanced signal (clips hooked up to center and ground on one end, cable shorted at the other end). The third picture is the one that shows the benefit of twisted pairs, but that only works with balanced signals. Inductance is shown top right of the T/S specs window.
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Here you go. I didn't have a spare 12 foot coax rca so I just tested the Stinger 4000 series 12 foot rca's (twisted pair). The coils were about 3.5 inches in diameter, so about 13 or 14 coils. The first picture is with the cable straight, second is coiled, third is coiled but tested in a way that simulates a balanced signal (clips hooked up to center and ground on one end, cable shorted at the other end). The third picture is the one that shows the benefit of twisted pairs, but that only works with balanced signals. Inductance is shown top right of the T/S specs window.
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Well.. It is sorta hard to argue against facts :cautious:

and very well done on the third test worth the shorting.
(I am not sure i understand it, but i know it is significant.) :)
 
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