6 feet of power cord can easily affect and audio system, depending on where it is in the system.
The deal, ie, how it affects, how it happens... is about the instantaneous delta of the inductive collapse of the field integration of the complex model of the power cord, under high delta draw from the DUT.This area of draw or complexity of the signal in the given 'moment' is how we as humans, hear.
100% of our hearing is coming out of what is effectively approximately 10% of the signal.
If you measure in engineering terms, this represents a vanishingly small amount of the signal, as it is weighted as a comparison to the entire signal.
If one, during measurement, ignores 90% of the signal, and then concentrates, or confines 'the entire measurement and comparison of signal' cycle, to the transients ONLY, then the measured distortions creep up into the many full percentage points area.
This is critical, as this is how the ear hears. The ear does not hear the bulk of the signal, it does not work with the bulk of the signal.
The ear hears EXCLUSIVELY via the transients and micro transients, and the differences in level and time, between said transients. It does not hear, acknowledge or know anything about the other 90+ percent of the signal.
So, when measuring... THROW OUT the 90% of the signal that means NOTHING to the human hearing system.
When we measure cables for differences, it turns out that the biggest area of change or behavioral differences between various cable,s is happening in the inductive transient collapse of the signal as it propagates in and via the cable.
Well, would you look at that. What a coincidence: It just happens to be exactly how and where the ear utilizes the signal.
Out of all the cable types in the world, there is one that is head and shoulders above the rest, in dealing with inductive collapse.
And that is Teo Audio's liquid metal audio cables. It is utterly unique and different.
For example, if one tries to make an inductive coil out of the liquid metal, it fails to operate in the same manner as wire, it fails to behave like a known entity, in expected inductive behavior. It is unique in this characteristic, regarding all other high lass metallic and/or 'solidus' conductive pathways.
The only relatively similar pathway, the only relatable known pathway, mathematically and in pure physics descriptive terms..... is that of a gas.
A literal quantum response and behavior characteristic, not Newtonian.