Good points, I did not listen out for step SPL change but of course the laptop speakers are very bandwidth limited.....I will take another listen to this example on other gear.
That said, IME AC cables can make sonic difference, and not always beneficial.
The peak current availability tester video referenced is interesting.
We can try the Richard Feynman test.
What causes these changes in peak current delivery ?......changes in RLC values.
What causes R, L and C ?.....magnetic interactions.....What causes magnetism ?.....quantum level interactions.....What is quantum interactions ?.....What causes these quantum interactions.....and so it goes.
This last question leads to other questions and investigations and outcomes....at least some of these interactions and behaviours are naturally not random and can be predictably controlled/modified at will, and reversibly.
On the system level approach, what is the effect of lowered AC supply cable RLC (impedance) values during the PSU reservoir capacitor charging period ?.
I can see a bunch of AC supply impedance dependent behaviors that will cause consequential behavioral changes in downstream stages and system final outcome.
IMHO it would be distinctly odd if indeed all AC supply cables 'sounded' exactly the same, IME this is not the case.
Dan.
The first thing to do is to snub the secondaries as per Mark Johnson's Quasimodo paper......this will eliminate a bunch of behaviours and ought to markedly reduce AC supply cable dependencies on one level....there are other levels levels also.
Congratulations on your new awareness, do tell.
Dan.
Really considered old awareness but new test equipment and methods to explore.
But I am interested in Mark Johnson’s Quasimodo paper, any links to it?
simple-math-transformer-snubber-using-quasimodo-test-jig.html
View attachment Quasimodo_jig_revA.pdf
That will get you started, there are other associated threads, search the forum - search.php
Dan.
View attachment Quasimodo_jig_revA.pdf
That will get you started, there are other associated threads, search the forum - search.php
Dan.
Thanks, I noticed that thread but have not looked in detail because I am using mostly switching power now. Brief browse through it seems that some ideas are similar yet some are different from what I am doing. But I might just change the power cable on my new device to what I normally use and see what happens.
Do we have a way of extracting the sound track to measure that? Would be fun if we could prove it.
But Fremer says "Proof That A.C. Cables Make a Big Sonic Difference"
. Audioquest are masters at gaming demos by telling you what you will hear but they seem to find a good supply of suckers.
My own feelings about this stuff seem to follow a periodic cycle between bemusement and despair. I'm kinda having more of the latter at the moment. Maybe it's the weather.
I have downloaded the video and extracted the audio saved as WAV file.
Which parts exactly do you want and I will attach Audacity screenshots.
Dan.
Sure...you tell me the four edit points (give or take) and I will do exactly that.
Dan.
The easier way to test a power cord is that if you have two independent amps each driving a channel, just swap one out in a channel and see if the sound image because disorientating. I just discovered I had a 3.08mm^2 cross section per conductor power cord around and replaced my 1.28mm^2 one. The replaced channel sounded quieter, and had better field depth presentation.
I see what you mean. It could be something to do with the moon.......
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