I wish it was true - it would make things a lot less expensive and easier.
In my experience I have found its not true. Regardless of budget each adjustment applied works towards achieving a personal goal realized by the listener. Even for the the "better" equipment - which require "better" more expensive esoteric "tweaks."
I have also heard "high-end manufactures deny the benefits of tweaking their components", which I find hypocritical because they perform "tweaks" to their models all the time. They refer to it as R&D.
As others have pointed out - those are not stock power cables you see on lifts in the show room or at audio shows. Manufacturers switch out for better Chips, Caps, Fuses, Tubes, Internal Cabling, Volume Controls and even Hand Wound All Silver Transformers to name a few; which leads to the launches of new models that they want you to buy. This is true with most all products in general.
In my experience I have found its not true. Regardless of budget each adjustment applied works towards achieving a personal goal realized by the listener. Even for the the "better" equipment - which require "better" more expensive esoteric "tweaks."
I have also heard "high-end manufactures deny the benefits of tweaking their components", which I find hypocritical because they perform "tweaks" to their models all the time. They refer to it as R&D.
As others have pointed out - those are not stock power cables you see on lifts in the show room or at audio shows. Manufacturers switch out for better Chips, Caps, Fuses, Tubes, Internal Cabling, Volume Controls and even Hand Wound All Silver Transformers to name a few; which leads to the launches of new models that they want you to buy. This is true with most all products in general.