The Golden Ears, with a Golden System, in a Golden Room couldn't hear a difference:
https://hometheaterhifi.com/volume_11_4/feature-article-blind-test-power-cords-12-2004.html
Yes, folks can accessorize all they want, have at er', pretty stuff is cool, but as Paul Simon sings, "faith ~ faith is an island in the setting sun, but truth ~ truth is the bottom line".
A few years back, I hosted a blind audition with a decent setup - 4 year old Maggie 1.7QR / Roksan amplification / top-line model Pioneer Elite SADC source / Mobile Fidelity master recordings, in a nice listening room, with "Golden Ear'd" folks, including symphony orchestra members and a few others with "Golden Ear" stereo systems and audio addictions like ours...
No one, and I mean no one ~ was able to hear the difference between robust, $350 silver wire interconnects (which many online were raving about) vs. absolute el-cheepo / "totally flimsy junk that came free with a junk VCR from the 1980's" RCA interconnects.
All of the hardware, minus the speakers of course, were located in an adjacent room, with thick, 12 ft. fancy speaker cables running under the door into the listening area - which was an ideal setup for this evaluation, as requests could be made and followed without anyone seeing each other or what was going on.
I took the evaluation to another level after our blind audition sessions were complete and ran a series of specifically requested tracks / "known cable" requests for the listeners - - but without actually changing the cables back and forth when that was requested.
Inevitably, the listeners "heard all manner of difference between the cables" as I supposedly swapped them back and forth on demand... except that I never changed the cables at all. They were listening to the same el-cheepos all along, but they still 'heard' all kinds of "depth", "warmth", "air" and "soundstage" when they thought that they were listening through the expensive / silver cables - and they were convinced that none of this existed when they thought that they were listening to the cheap / junk cables...
Placebo effects are scientifically valid. Expensive cables, unfortunately, are not...
Now, I'm not here to argue with every other Golden Ear that wants to chip in, because, I've heard their positions, justifications and breathless refrains of "even my wife could hear the difference right away when she walked into the room" all before, 101 times... (more actually).
Until someone can show me that they can "hear the difference" between cables -- when they cannot see which cable is in place - - then I call BS on it.
Over and out.