... abit confused: how does a power cord affect the presentation of sound...

I understand that many subjects have already been discussed many times over the years.  However, many times, it is difficult to surf through the years of posts to find adequate responses.  So, it really isn't a problem for a new audiophile to post a topic that has been discussed several times previously.

If you can lead the person to earlier posts, then fine.  If not, then it serves no real purpose rubbing it into their face that this has been discussed many times.  That person was not here then.

In any case, Power Cords are basic.  Then first must be able to handle with margins the voltage and current requirements.  That is mandatory.  In addition is the impedance of the cable.  This impedance varies over frequency.  This is the real problem.  If the interconnecting and terminating equipment isn't designed to handle this variation in cable impedance over frequency, then this is what really effects (afftects?) the signal and the sound.  And yes, this is indeed measurable.

Cable and transmission line science is known and has been around for many decades.

This is really why different cables may make the same system sound different.  Also, I can't recall if most cable manufacturers actually list the impedance of cables over frequency.  This, to me would be the most helpful of information.

This is also why some companies have "networks" attached to cables.  They are designed to minimize the impedance of the cables over the frequency range. Over certain frequencies, it provides for "resonance".  in other words, the impedance due to inductance of the cable negates the "impedance" due to the capacitance of the cable and you are left (hopefully) with an unchanging minimum resistance value.

So, yes, cable can and do make a significant difference in sound quality of the system.  However, It does also depend on how well designed or how poorly designed was the interconnecting equipment and whether they can handle the changes in cable impedance over frequency.

Another reason why some equipment manufacturers "recommend" certain cables.  They've tested their equipment with certain cables, so they know.

A quick bit of history and humor.  I purchased years ago a Mark Levinson 23.5 amp used.  It arrived with the incorrect power cord.  It sounded as if the singer was literally being strangled.  I contacted the seller and he realized that he shipped the wrong power cord with the amp.  He sent the correct cord and all was well.

I was in Stereo Design in San Diego years ago with friends listening to their top system.  It was great.  The representative quickly changed one set of interconnect cables for another and it was like he changed speakers.

I'm an Electrical/Electronics Engineer.  So was my friend.  This made no sense to us, until we thought it through.  So yes, cables do make a difference.

My view is that if I listened to a piece of equipment in the store with manufacturer supplied cable, then that's fine for me in my home system.  But, typically, the stores use much better or more expensive cabling in the top demonstration systems.  Which they should be telling us and at a minimum also demo the equipment with the cord that will be supplied with the equipment so we can make an educated and economic decision at that time.

just my thoughts.

enjoy

My own experiments, not with cable tough, prove to my ears that all the electrical grid of the house is ONE entity in the perspective of an audio system...

Anything i put all along, modify the S.Q. i experimented with my own creation homemade device and various stones and minerals....

Then thinking that a power cord will affect the S.Q. is more than probable for me, never mind the equations that some will throw at my head to the contrary...

:)

Interesting point. Considering how all that current has to flow through a ’tiny’ fuse, yet a big honking power cord can still make a change to the overall sound still boggles my mind.

Richard Feynman once said if anyone thinks he understands quantum physics, he doesn’t know what he’s talking about.

How electrons and currents are not as intuitive as one thinks. There are still things that can’t be relied on "common sense".

There are people who think as long as the power cord is big enough, then that’s all you need. I actually have some power cords that are more than thick enough but they sound a bit "slow". How they are constructed also affects the sound.

This is my first time posting. I thought I join in the fun. I’m no electrical engineer but here are my thoughts:

1. The miles of cables before the wall outlets have no bearing on the quality of the sound just like the miles of dirty river water before our faucets. It’s the purity of the signal before entering the electronics that matters.

2. In audio, it’s all about vibration. It’s about the vibration of the electrons in the cable to the vibration of the particles in the air. If the electrons can vibrate in perfect sync, we get perfect sound. The quest of the cable makers is to reach this perfection. The differences in characteristics of the vibration of the electrons in the cable define the sound we hear.

My 2 cents.