New OPEN SOURCE method for testing speaker cables

[Sir Sanders Zingmore]

For this reason, I have also deduced that double-blind tests are to be considered insignificant, because even a small movement of the head between one session and the next can change the result regardless of the equipment and tools used

Sorry but this is just not correct. Changes in perception from head movements in no way invalidate the benefit of removing sighted bias

 

[voodooless]

when we listen to music, it can radically alter the listening experience, precisely because the limit and the related harmonic content can vary greatly. For this reason, I have also deduced that double-blind tests are to be considered insignificant, because even a small movement of the head between one session and the next can change the result regardless of the equipment and tools used.

What? How does this even follow? In an ABX test, you can move your head any way you like..

 

[Mnyb]

Sorry but this is just not correct. Changes in perception from head movements in no way invalidate the benefit of removing sighted bias

yes logically sighted bias is a magnitudes bigger factor than the minute differences we can see in modern well designed electronics .
If the "obvius" differences goes away when doing a controlled test without sighted bias and other problems, it a sign that the control is working as intended . Not a clue to digg an even deeper hole

 

[Vladimir Filevski]

"the performance of audio power cables when passing "complex" signals, such as actual musical signals."

Since when do we transfer signals trough the power cables

I think it is "Google translation" error - in the illustrations "power cables" are connected between amplifier and loudspeaker, so they must be loudspeakers cables.
Quote from the OP pdf document: "In this analysis, we will primarily examine the behavior of power cables, i.e., the cables that typically connect amplifiers to loudspeakers."

 

[A Surfer]

I love when people make self serving threads and represent them as something more than a way to monetize their efforts. I smell a hidden agenda.

 

[giampierovecchio]

"the performance of audio power cables when passing "complex" signals, such as actual musical signals."

Since when do we transfer signals trough the power cables

Sorry for the misunderstanding, my English isn't perfect. I was referring to the cables connecting the amplifier to the speakers, not the power cables.

 

[Vladimir Filevski]

..cables connecting the amplifier to the speakers..

OK, now for the essence. I have read your pdf document and I have question:
Using method 2B (page 12) you are measuring voltage difference between input and the output of the cable. On pages 14 through 17 you measured voltage difference ("Variation") to be from 1.6 V (at 50 Hz) up to 8 V (at 15 kHz) - sorry, it is impossible for voltage difference to be that high!

Edit: And yes - I have measured loudspeaker cables that way. No difference except for the simple voltage drop from the cable resistance.
Your explanations from pages through 7 are either grossly wrong, or have translation issues.

 

[giampierovecchio]

OK, now for the essence. I have read your pdf document and I have question:
Using method 2B (page 12) you are measuring voltage difference between input and the output of the cable. On pages 14 through 17 you measured voltage difference ("Variation") to be from 1.6 V (at 50 Hz) up to 8 V (at 15 kHz) - sorry, it is impossible for voltage difference to be that high! And yes - I have measured loudspeaker cables that way.

Of course, that's an experimental instrument with an out-of-range scale. If you look at the pages, you'll find an equivalence table showing the millivolt values the instrument reading corresponds to. Below, you'll also find the calculated attenuation in decibels for the two signals. Sorry if this information is not clear and immediate on the document

I will try to understand if there are any translation problems, regarding the merits of the concepts expressed, they are based on objective observations, they are variations that in no case determine values greater than 0.4 DB, however these variations are audible and what the method aims to report is their detection at an instrumental level, if I may say so, for the first time.

 

[Vladimir Filevski]

If you look at the pages, you'll find an equivalence table showing the millivolt values the instrument reading corresponds to. Below, you'll also find the calculated attenuation in decibels for the two signals.

Sorry, it is not clear - it is not defined in the text.
So, "CN" value is arbitrary 10 times bigger than the actual noise, like "(CN 1,5) ~ 150 mV". OK, but you didn't mention anywhere in the text that those voltage differences ("Variance") are 10 times bigger than actual measured voltage difference! Further, actual voltage difference levels (10 times lower than "Variance") are still unbelievably high - sorry, it is impossible!
Your explanations from pages 3 through 7 are either grossly wrong, or have enormous translation issues.

 

[DVinylfan]