Benfits of upgraded connectors

You mean the patent of 47Labs for RCA plugs I suppose.
It is interesting but very restricted by design, for it is only permits a plain symmetrical solid core configuration.
But for speaker cable, if the conductors (and the braid) are silver, it is true.
Now even if it is true for the power cords, it is also very inconvenient to the point of masochism.

It makes the cable's personality more obvious as it permits a cleaner passing of the signal, providing that has high purity (not Brass) & as few as possible metal parts (not heavy solid bars but hollow tubes) that are direct Gold plated (avoiding the intermediate Nickel plating) or Solid Silver .
Even the quality of the solder matters !
But I think it is not more significant than the cable's conductors at least at Interconnects & Speaker cables as I've had experienced so far.
After all, the manufacturer voiced it's cable with the particular connector that sells it. And certainly it is not adviced to desolder & replace them.
If your cable is available in bulk, you can pre order it with your favorit RCA plugs or you may attempt to proceed by your soldering skills.
On Power cables they say the connectors are of a much more concern & can manage to completely transform the cable's sound ! But I'll have to make my search about this.

Dear Schipo,
We can certainly hear the difference !
The point is that we have to climb over a certain level of performance first.
And this one demands commitment & tenacity, but most necessarily objectivity & integrity about our wrong choises & the courage to step back & perceive them as wrong.
Of course, money is a barrier but this is not an excuse :
It is one thing to say that you can't hear the difference, and another thing to say that "this upgrade is subtle but costly & I would prefer to change my CDP instead of buying plugs".

Well Schipo, I am speechless! 'cause all of us we have so many vivid memories about testing especially speaker cables.
Maybe what this guy said is true about some McIntosh or perhaps a few more set-ups, or as I'm about to suspect, the whole thing depends of electrical charachteristics between components. But everything has a different idiosyncrasy because of this ! So, we have to explore it's matching abilities, trying to control them & bring some balance.
I really appreciate your thought about "changing the guide" and I'm greatful that you remind me this !
Thank you & I have to say that your post somehow acts as a break to my will to purchase some Oyaide 004 unless I can manage to A/B test them with the stock connectors.

...and very revealing speakers also !