Are manufacturer AC cables good enough?

No matter how I tried I couldn’t hear any difference between the stock and the expensive cable.

You don’t have to try and convince me. I could tell from the beginning you weren’t any good at this.
;-) 

I watched a video of Floyd Toole giving a talk on speaker testing when he was discussing how they do testing he mentioned if someone tells him their experiences he asks how the test was administered if it was sighted he said in my mind I simply dismiss it and nod because I know it’s a useless test. Sighted testing is completely worthless in understanding the effects and differences in products not just audio.

I have to suspect that anyone claiming "you can't control audio tests easily" has likely never set up an "audio test". Triple blind is the holy grail, double blind works really well when you have an expectation of tester bias. Single blind is sufficient for most work where tester bias is unlikely or communication low.


Even the most basic single blind test is far more rigourous than any sited test all other variables the same.  Anyone who advocates for sited tests, or advocates against blind tests, can be simply ignored. Their ignorance w.r.t. testing of anything involving human perception is too limited to make their opinion of use or they have an agenda that again makes their communication of no value.

@glupson,
I feel the coming of a resurgence.....
I hope I am wrong.