Zip cord for speaker test

Well, Hans, that was something I didn't expect!
The cable improved that much... without the modification it sounded dull, the imaging was blurred, boring all in all ... but then: dynamics, imaging, almost everything improved considerably. With my former cable the soundstage was a bit deeper, but now there is more vertical spatial differentiation.
Im not good in describing listening impressions and everyone listens different, but these are not subjective perceptions.
One of the best value for the money improvements!

Hi Hans,
the surprisingly positive result encourages me to make further experiments…
As I said, I have used DIY solid core cable most of the time with very good results.
A simple twisted enamelled copper wire sounds (to me) a lot better than the zip-cord without the modification.
So the next logical step for me is to make a cable with solid core wire with the modification.
I understood, how to achieve the desired capacitance for each network.
Is there a way to calculate the values for the series resistance and inductance?
I’m not that good with LTSpice. Is there a hint in a Brisson patent?

Apart from that, I made a mistake when calculating the 0,45nH Inductors and the resulting
inductance is rather ~100nH. But the result was very good anyways.
I ‘m going to correct that to see (hear) if has an effect.

Cheers, Boris
Many thanks for the offer. This will take some time as I go on vacation next week.
After that I will buy the solid core wire and make the cable. I will contact you when I'm back.
Since I'm in the process of building new speakers (open source monkey coffin) I would like to to make cables for them right away. My plan is to to make the cable Z switchable...

Hi Hans,
I managed to simulate this in Spice (I believe), but I did not find on how the inductor in the RLC- network has any effect…
Could you tell me what I have to look for after changing the inductivity?



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Hans Polak

Paid Member
2005-03-17 4:25 pm
Hans - do you use 3 compensation circuits regardless of length? Beginning, mid and end - or is its certain number per meter?

For short cables 1 or 2 compensation circuits are probably more practical. As from 1.5 meter and longer, 3 compensation circuits seem to be an optimum, at least from a simulation point of view.
What the effect is on having 1 or more networks on the auditory perception is not something I tried, because my initial attempt was to copy the transfer characteristic of a certain MIT cable having 3 compensation networks.