Power cord upgrade

Recently replaced my Zavfino Fina -OCC with a AQ Tornado Constant Current source PC on my Herron 360 Ref. Instant improvement....more detail along with a sense of refinement.

@1971gto455ho the sole responsibility of science is to produce theories and in best case scenarios the results that the scientists themselves will need to challenge to prove beyond reasonable doubt.
Until we have the means to measure what we hear with an oscilloscope and have it rendered on the screen as measurements, you have an argument but it isn’t a very valid one. I’m totally cool with it though, as I said before, if you osciloscopians, “measurements only” crowd, want claim you have a scientific proof and stick to your guns. Just know there’s more to it.

Personal experience is everything 

How many who swap out a Cable and report back immediately about noticeable change, actually revisit the comparisons between the Older in use > Newer in use cable to learn where the real differences are to be found. The more a Cable Signal, Solder and the selected Connector 'Burn In', is the only time the final analysis of the differences are going to be found.

Under the guidance of @slaw  statement " Personal experience is everything ".

My own experiences of exchanging a Cable/Signal Path Wire, is that depending on the Audio System in use. The very noticeable changes that may have been detected are diminished following comparisons where a period of 'Burn In' has been able to occur. The outcome during the comparison, is where personal preference for a particular trait the cable is able to produce will be the attraction. A Bass Note might be a little bit tidier and decay with more realism, a Vocal might push out with a little more forwardness in the Mid Range, either of these will/will not be an attractor to all, each are unique in the end sound and structure of the sound they like. 

Different Cables, when becoming a 'Burnt In' Cable, that is used for a comparison.  Do become much closer in their end sound when heard side by side using the same devices being coupled with the Cables and same Tracks replayed.

I am having access to devices with different resolving capabilities and can say with certainty, relying on the use of my ears only, the less the detail resolving capability of a device or system, will put in place difficulties for detecting a difference between differing cables end sound. The detection of end sound differences remains difficult, even when a single device which is poor at resolving detail, is in use in a system that has supporting devices that are extremely good at resolving detail.

For somebody on a tight budget and using a Audio System that does not resolve the intricate detail from a recording, the idea of making a Cable change will in my view  be premature and not too rewarding/not rewarding at all. The monies considered being used, might be better put aside towards devices that can resolve intricate details better. 

The good thing is that there are very cheap methods out there to experience Cables in use, to learn if monies are worth parting with. Loaners,  30 Day Money Back Guarantees, Used sale Items, especially a good option if a vendor agrees to a trial period as part of the sale, don't ask, don't get. Any of these options will get Cables in ones possession with little risk to their monies, enabling one to gather experiences and underpin the idea of whether a purchase is worthwhile being  made.     

@pindac Well said.

I believe the naysayers systems just are not resolving enough to hear the differences. I know I started out that way. Proof was in the pudding once I made a major jump in equipment.

Again appreciate everyone's input, and am surprised at how long this thread stayed alive.