The Truth About Power Cords and there "Real" Price to Performance

"it is almost like OFC, single crystal, OCC, silver, etc. does not matter"

Do those really matter....for a power cord?
The factors I listed were wire gauge, noise-cancelling geometry, shielding, and adequate plugs/iec. I would amend that and add a good wall outlet that tightly grips the plug.

Audiozenoligy
That is not true. If all they did was transmit 60Hz, then linear power supplies would not work. There is considerably energy above 60Hz.
The limitation in frequency response will be the transformer primarily.

In America all of the power grid is generated at 60 Hz. That included the 120 Volt line at your house to the ultra high voltages in the long distance transmission lines. But it all has to be at exactly 60 Hz or power gets wasted and bad things happen.
Are you mistaking Hz (cycles per second) for voltage? From the power plant voltages can be stepped up for transmission to thousands of volts (so you can use a smaller wire) but close to every house there is a step down transformer that converts it to 120 volts for home use. The only energy you get is 120 Volts at 60 Hz. That is what your components use and everything else should be considered noise.

Switching power transformers can be universal so you can plug them in to a 240 volt 50 Hz European power outlet and it still works. But it has nothing to do with the small amount of electrical interference at frequencies other than 50 Hz for Europe or 60 Hz in North America.

Oscillation frequency of alternating current and voltage 🔚🔜 is not the same thing as frequency of the signal. It is a semantic argument. Just as the audio waveform does not ever travel down a single wire. There is no frequency of the signal when it travels down one wire, and in the opposite direction on the other wire. I.e., the wires are not vibratory. They are subject to external vibration, however. It’s a semantic argument. Electrical power doesn’t have a frequency. Energy doesn’t have a frequency. The audio signal is not vibrating, it’s oscillating. An any instant in time it can only be going in one direction. 🔜

delkal,

You are confusing frequency of generation with frequency of power draw. Linear power supplies may draw power 120 times per second (rectified), but the bandwidth of what they draw is not at all limited to 60Hz but has harmonics well beyond 60Hz. If that was not the case, linear power supplies would not work. It is akin to a 60Hz square wave not being only 60Hz, but having significant energy at harmonics of 60Hz. Is it noise? ... matter of definition I guess, but it is certainly an artifact of a linear power supply. The power draw for a linear power supply will always have significant harmonic content.

A switch mode power supply on the other hand may draw power at  something approaching 60Hz, at least many attempt to.

geoffait- To get a speaker to produce sound you need an oscillating current of some frequency and AC power is distributed as an oscillating current at 60 Hz. Do you ever wonder why a 60 Hz ground loop hum from the AC sounds exactly the same as a 60 Hz audio test tone?

AudioZenoligy- A 60 Hz signal starts out at zero volts, increases to positive voltage, decreases to 0 again then goes to negative voltages, then back to zero. This cycle happens 60 times a second (60 HZ). Linear power supplies draw on the positive swings and the negative swings. There is no power when it crosses zero. That is where you get the mistaken idea that there is any energy at 120 HZ. There isn’t. 120 Hz is just half of the 60 Hz full cycle.

Harmonics is still distortion and for power distribution and is not OK. Ever. And even with an audio signal going to your speakers harmonic distortion is only a minor component. While some distortion / harmonics can be considered OK (like the distortion in a tube amp) if your system has more than one percent you might want to consider upgrading to high fidelity.

It is ironic that many of the most vocal people in this thread do not seem to have a basic understanding of how power and audio signals work.  Further debating is pointless.