It’s solely because of that knowledge and experience that we have sound reproduction machines and are able to argue about them in a forum. Thank you.
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Get real. The appreciation of music replay systems is largely subjective. On the whole, it falls down to what a person prefers. For example, one person might prefer the sound of a certain DAC over another.
Just because a piece of equipment measures well, doesn’t necessarily mean that it will sound good. And vice-versa.
And some things cannot be ‘measured’. On this topic, I know that power cables do impact on the sound of my system. Because I’ve used my ears.
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and your brain, which could be having an influence on what you are hearing (or not)
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That is true and nobody here is saying opposite.
What we say is that for power cables there’s no preference because there’s no difference.
Which things?
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Absolutely. But before we got to appreciate the music without a live performance in our living room, engineers first had to build the machines. Yes, there’s been a lot of critical listening involved in that process, but it was done in a controlled, scientific fashion. Listening in a high-end audio store guided by salespeople came after that.
Please tell me how you shut down your brain when you sit down on the couch and press play.
Um, fall asleep?
I own a Linn LP12 turntable. It can be bought with a variety of power supplies. Which isn’t too far from what we’re talking about here.
I know that my Radikal power supply unit sounds much better on my deck than a Lingo power supply. I’ve listened. And, coincidentally, a lot of people who have listened also report the same.
The irony is, is that the two PSU’s rotate the platter at exactly the same speed, and to all intents and purposes ‘measure’ identically.
We just have to accept that certain things cannot simply be explained by ‘measurements’.
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Usually order(s) of magnitude harder to tell a difference with electronic devices rather than speakers, but @Sean_Olive would tell you something different when done under controlled conditions in an unsighted test, I’d guess…
That’s your opinion. But not mine.
Right. And when those things are only perceived by people, they usually can be explained by imagination.
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How can I imagine something physically vibrating with cable a and not with cable b? Volume level was not touched inbetween.
Without getting into a different argument, let’s admit that PSUs and power cables are completely different devices.
It’s not my opinion but proven and measured fact. It’s you with opinion. (No offense)
Isn’t that what this whole endeavour is about? Stirring one’s imagination by immersion in music? 
If you want to be ‘flat earth’ about it, then that’s fine. I might not agree with your approach, but you’re entitled to your opinion.
The same goes for people who believe that different power cables do influence the sound of their systems. And their opinion doesn’t mean any less, just because you can’t’ ‘measure’ the differences.
Why? The both supply electrical power to a piece of equipment via a cable. In the same way that power cables do.
They’re the complete opposite, there are solid and provable theories for TT power supply and motor design etc
The two just don’t compare.
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don’t even know where to start with that.
And why should I believe ‘measurements’ over my opinion?
My Chord DAC probably measures identically to other DAC’s. But I prefer the sound it makes.
As I’ve said, this whole thing is subjective.
Because a power cable is a piece of wire, while a good PSU is a relatively complex electronics device.