Do powercords make a difference in sound?

Al, If I have you thinking that's a good thing; it means there's some meat on my comments. :)

When I use the terms 'sets' or 'suites" of cables I mean the whole group - PC/IC/SC/ and digital or phono, whichever applicable. If one uses only a power cord or two or one set of interconnects there is a possibility that the difference is so small it will be difficult to perceive. Persons with hearing loss will find these kinds of comparisons unsatisfying and be tempted to proclaim that there is nothing to the cable mania. This is especially so if the cables are built similarly. In such instances it may take the entire set and still the two brands might sound similar. I found in my comparisons that Acoustic Zen and Harmonic Technology (not the fiber optic cables, but the ones with metal conductors) sounded very close to each other. If one happened to compare them without being aware of their very similar construction/design they would be tempted to conclude erroneously that all cables sound the same.

However, when two rather differently designed and constructed sets are compared (i.e. Magnan Cables and Wireworld) the difference is usually easily heard. And when an entire set is swapped out there is a sea change of sound. If I were to swap out only the set of power cords the effect would be consistent but moderated. As I have said before, often the change of an entire set is so pronounced as to be similar to switching a box component, either source, pre, or amp.

My observations have been consistent when comparing sets of power cables only, or sets of Interconnects only. Logically they would have to, or else my assertion would not have merit. The sum of the effect of the set is nothing other than each cable exerting its influence upon the signal.

I am sure that what I am stating is counter-intuitive. However, it can be demonstrated quite persuasively in a rater simple fashion; by merely swapping sets of cables!

(oh, wow, my wife just brought me a plate with a cut fresh nectarine! YUMMY!)

I would suggest that your objections due to the differing AC line conditions, noise etc. are fairly inconsequential to the effect of the cables. I have had consistent results when I tested different cables at others' homes/systems. I also have heard consistent effects from cables when using all manner of power filtration/regeneration devices. Essentially power treatment or lack of it does not mask a cables' unique sonic properties.

Al, all that really remains is for you to actually test my theory. By the way, you used an illustration of a set of cables with low inductance providing greater high frequency extension depening on the speakers' impedance.
My observations are that such a cable will provide extended high frequencies no matter what speaker you use. The effect may be more noticeable/intense with a speaker with higher impedance, but certainly does not disappear when using a speaker of lower impedance.

It's quite simple; a cable brand (PC/IC/SC) which has rolled off the high end will do so with any speaker. One which extends the high end will do so with any speaker. And so on. Why? Because of the construction/design of the cables.

Hi Byron, I'm sorry, but this otherwise very nice discussion is just too far off into the weeds for me to want to compound it further by delving into the boring specifics of my own experiences with power cords. You sound like you've done just as much experimentation as I have, so if you reached somewhat different conclusions, that's good enough for me.

Regardless of whether or not the 'sound' associated with a cable is extrinsic, intrinsic, or, as I think most of us would probably accept, a mixture of both (a description that in my book would apply to all audio components), it seems to me that as long as one can hear the differences, no theoretical conclusions regarding this factor would be likely to ultimately affect one's choices. The debate probably arises (once again) because we are talking about cables in general, and power cords in particular, which still tend to be regarded by many as though they are somehow extraneous to the signal path.

About this:

I will challenge you on one thing though, and that is this comment...

A listener's impression of a power cord might change with seating position!

On the face of it, this statement strikes me as a contradiction of the position you are advancing. If a listener’s impression of a power cord changes from one listening position to another, then the power cord in question FAILS TO exhibit consistent audible characteristics. And if a power cord fails to exhibit consistent audible characteristics across MINOR changes like listening position, then how can we expect the very same power cord to exhibit consistent audible characteristics across MAJOR changes, like two different audio systems?

I would take exception with two of your premises there. First, I don't consider a change in seating position to be at all minor. To me that can certainly be more significant than almost any change in wires (or of almost any component of similar type and quality, for that matter). As for the second, I'll ask you your own question in modified form: If your impression of the sound of a speaker were to change with listening position (and of course it would), would you then conclude that the speaker "fails to exhibit consistent audible characteristics" and expect it not to necessarily display any similarities in another setting?

when i was shopping for the quad 63, i visited several dealers until i heard what i liked. so it is obvious that speakers will sound different for a variety of reasons.

if i change my listening position from kneeling to sitting to standing, my quads (esl) will sound different. those who own this speaker will attest to my experiences.

changing ones seating position , while changing the sound of a stereo system, saying that the line cord contributed to the change in sound seems counter intuitive.

could someone explain how this could happen.

is it reasonable to also say that the performance of an amp could change with listening position.

listening position affects how sound is dispersed to your ears. amplifiers, power cords, and other passive and active components , excluding a speaker, do not disperse or propagate sound waves.

expensive power cords are funny! some of you should find some uber expensive wire and redo your entire electrical system from the pole in front of your house to the outlet! out of curiosity, i wonder why every manufacture doesnt sell an optional upgraded power cord with their amps,cd players,preamps,etc.,since so many people think they hear an improvement with them? it could be that the cord supplied is good enough in my opinion.

The seating position discussion has muddied the waters unnecessarily. I believe the intent was to discuss the fact that other variables are at work, as well as the variable of the sound of the cables. I would hope we all agree that seating postion has no absolute effect upon the performance of the cords. Perceptually, however, the system may sound quite different when seating position is changed, and one might find themselves more agreeable to the system. However, likely not.

It has been my experience that seating position does not have the "power" as a change to radically alter one's perception of what the cords are doing. Yes, I have changed seating positions while working with cords, and no, it has not had a significant effect on my conclusions about how any particular cords sound. While it does alter the experience it does not override the cables' performance when compared. I have selected the same cables as my preference regardless of the seating position (within reason, of course).

Recently, after having the same seating position for five years elected to move my chair 5" closer to the speakers. The sacrifice is in the sharpness of the center image, but in exchange I have more bass presence and a slightly more 3-D soundstage. Doing so has had no impact upon my decisions regarding cables.

I haven not tested the following thought, but it is quite possible that I would prefer a system where I was not in my favorite seating position (i.e. 5" off, like my previous listening position) yet had superior cords versus one where the seating position was "improved" and had poorer cords in use. Going off of my past experiences I would prefer the system with the better cabling.

People who think room treatments and seating position get you 90% of the way "there" (As though cheaper gear set up well will get you almost SOTA sound; it will not) will likely choke on that statement. However, anyone who's conducted tests of sets of cables as I have will likely agree.

Similarly, at times I change the inside angle of my panel speakers; once again this has not changed my conclusions regarding any particular cables.

Based on continued testing I would not consider listening position to be a dominant factor in cable selection.