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-   -   Zip cord for speaker test (https://www.diyaudio.com/forums/everything-else/371099-zip-cord-speaker-test.html)

planet IX 4th July 2021 11:06 AM

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!

Boris

planet IX 8th July 2021 10:33 AM

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

Hans Polak 8th July 2021 04:17 PM

Hi Boris,
Great to hear that you achieved such positive results.
Send me the measured inductance and capacity of your twisted solid core and I’ll do the calculation for you.

Hans

planet IX 8th July 2021 04:47 PM

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...

Boris

PaleRider 31st July 2021 06:19 PM

Isn`t there anyone here who has any idea of what speakercables is about?

PaleRider 1st August 2021 06:24 PM

Thought so

1audio 2nd August 2021 02:54 AM

Short form- convert the effective impedance of the cable to match that of the speaker. Hans should be able to explain in better detail.

Hans Polak 2nd August 2021 08:53 PM

Hi Demian,
Did you already find the opportunity to collect some of your MIT speaker cables ?

Hans

PaleRider 2nd August 2021 10:12 PM

Quote:

Originally Posted by 1audio (https://www.diyaudio.com/forums/everything-else/371099-zip-cord-speaker-test-post6739967.html#post6739967)
Short form- convert the effective impedance of the cable to match that of the speaker. Hans should be able to explain in better detail.

Funny theory but wrong

1audio 2nd August 2021 11:25 PM

Hans:
I have not found them. I may have given them way some years ago. Just too much of this stuff to accumulate.


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