Do powercords make a difference in sound?


Do they make a difference by upgrading stock power cords in amps, ect versus aftermarket power cords? If so, can anyone advise a good bang for the buck upgrade?
chad329
Corazon, you are also contributing well to the discussion, thank you.

Here are your answers based on my experiences with comparing sets of cables:

#1 Absolutely cables' sound ARE influenced by a myriad of system variables. I am not taking the position that such things as input or output impedance, etc. don't effect cables.

At the same time, I am insisting that the cables' own nature/build dictates sonic attributes which it brings to the system, and that these attributes are fixed, not variable.

#2-3 Now, the cable will sound different from system to system. However, the qualities which the cable possesses will also be easily identified, especially when compared to another set which one is familiar with. i.e. a "dull" sounding cable will sound dull with all electronics in comparison to a cable which sounds bright and detailed with all electronics. One does not obtain this knowledge from mixing cables, only from using complete sets in comparison. Obviously, if one is mixing cables and inserting new ones here and there assurance of the sound of the cable is impossible.

For that reason, Mrtennis' suggestion to switch into the mix a new amp is useless. One has no certainty that the amp is not causing the roll off in bass. The only way to gain certainty is by using complete sets of cables from one manufacturer.

Why are people in this discussion acting as though cables have infinitely flexible characteristics? I find the argument that there is no fixed sound to a cable quite intellectually faulty. A person, it seems, arrives at that conclusion from theory perhaps, but listening comparisons do not support that theory. I believe that actual comparison would quite handily convince someone that cables do present their own properties which are integral to them.

#4 I am also leading to the conclusion that a set of cables with preferred properties sonically will yield a predictable result, a desired result. One cable will bring a certain degree of those sonic properties, but a set will amplify them. When one finds a favored cable, that set of cables can be used to transfer those properties onto ANY system. This is precisely what cable manufacturers are claiming their cables can do. Yet it seems so many audiophiles simply ignore that claim and mix the cables, thereby destroying/mitigating any possibility of discovering the particular qualities the manufacturer intended!

Corazon, you say in #5. "I wonder, if a person experiences or expects certain attributes from a product, wouldn't they be inclined to expect it wherever it may be installed? Especially if it is not a blind test? Is this not an argument made by some in the trade mags?" Yup. Precisely. But remember, my position is that blind tests are not even needed! The difference is SO apparent that if one said they needed a blind test I would consider their hearing suspect.

#6 Yes, why chase marginal "improvements"?

Hopefully my ruminations will get some people to reconsider their position on cabling and on how to approach cables as a component. Remember, I was vociferously assured that I was right when I held the opinion that 1. Cables were not that big a deal, and 2. One did not have to work with matched sets. I was wrong on both counts, and cables handled properly have been a crucial element of creating superior sounding systems.

Finally, Corazon, I quote your thought, "Neither am I in a position to offer arguments supporting any side, objective or subjective." That can change. Just start culling cables and comparing; you'll see what I'm talking about. I want to reinforce that Al and Bryon's points are cogent, their logic compelling. However, compelling logic does not determine the outcome of listening tests. Remember that even though I do not have the engineering background to argue from theory, my position is defensible by the fact that there are actual/physical changes between the cables/sets being compared. The decision one must make is whether or not such differences in cables can yield audibly discernible differences. On the one hand are people who have not tested it and said, "No, it cannot." On the other hand I stand - and I have tested it, and of course say, "Yes, it does!"

Now, if the others wish to conduct the simple listening tests/comparisons between sets and then return and state that their informal tests supported the theory that cable geometry, dielectric, conductor material, total gauge, etc. has no bearing on the sound of a cable when transferred between components, I would be happy to hear about it.
But to simply say, "I don't think it will have an influence," when physical differences exist between cables, and I have tested and found there to be sonic differences; well, I'm sorry, but I'm not impressed by such logic. :)

I am saying the others are mistaken, but politely so! ;)

Survey: How many of you have conducted comparisons between a few sets of cables? What was your conclusion? I think it would be very telling if these people chimed in. My guess is that very few have done so, perhaps even very few dealers, distributors or manufacturers. This is likely why there are often a couple of zealous persons arguing my perspective while so many take the opposite viewpoint. I believe the vast majority of audiophiles have never dealt with complete sets of cables in comparison. It's costly (at least temporarily) and time consuming to do so. It's so much easier to conclude, "It's not that big of a deal..." But it IS.

How big of a deal is it? I never had a system yielding complete satisfaction when listening to it until I got serious about working with sets of cables. I would encourage audiophiles who consider themselves "extreme" or serious enthusiasts to pursue the comparison of sets of cables. I have found it to be a terrifically rewarding activity.

I discuss some similar principles in my Audiophile Laws which are published on Dagogo.com. They can be found in the "Columns" section of the website. Some may seem controversial or counter-intuitive, however they are all based on practical considerations and actual informal testing, not just theory. In other words, they work. :)
hi doug:

ceteris paribus, if you have one power cord and two amps, and the bass is rolled with one amp and not with the other, the problem may not be with the cable.

as a practical issue, if you like the amp you have, you may try different cords to see which, if any do not produce a roll off.

in any case, when you have an amp and a power cord, there are two variables.
If spark plugs, the type of oil, tires, and gasoline can make a difference in performance and efficiency of any given vehicle so can audiophile tweeks. Any nay sayers are just thinking signal in, is signal out. My ears are more sensitive than a piece of test equipment sending a pattern through cable. I do not hear in test signals. Let's lay to rest this cables make no difference crap. My ears are the scientific instrument!
I first want to second the comments by Dave (Corazon) about the quality and value of many of the posts in this thread. While it is of course not expectable that a clear consensus will be reached, or that many minds will be changed by the debate, it seems clear that more than a few of the posts above are potentially of uncommonly high value, to both protagonists and readers, compared to those that typically appear in threads devoted to cables, and especially to power cords. If only by virtue of stimulating and broadening each person’s thinking.

A question for Doug: In your several references to the value of testing with complete sets of cables from the same manufacturer, are you referring to complete sets of just power cords, or to sets comprising power cords, speaker cables, line-level interconnects, and perhaps also phono cables. If the latter, then I not only find your arguments to be technically plausible, but even expectable. As I indicated in a post earlier in this thread, IMO extrinisic technical factors relating to cables which conduct analog signals can easily explain the existence of sonic signatures, that will be consistent and predictable across multiple components and systems, obviously not in degree, but in kind.

Some examples: Speaker cables having low inductance will, everything else being equal, provide increased high frequency extension, to a greater or lesser degree depending on the speaker’s impedance at high frequencies. “Lesser degree,” of course, will include some cases in which the effect is audibly insignificant, especially if the cable is short. Interconnect cables having low capacitance will do the same, to a greater or lesser degree depending on the output impedance of the component driving the cable. Unbalanced interconnect cables having low resistance in their shield or other return conductor will reduce ground loop-related hum and/or high frequency noise that may tend to occur with electronic components in some setups, thereby improving “background blackness” and resolution of low level detail.

On the other hand, if your reference to complete sets refers to just power cords, then while I think your comments support your case much more persuasively than most others that tend to be encountered in threads dealing with this subject matter, and although I obviously am not in a position to question or doubt your extensive relevant listening experience, and although I certainly do not believe that generally recognized technical principles can come close to explaining all of our sonic perceptions, the combination of lack of convincing technical rationale which is inherent in that position, and what I perceive to be the major degree of technical counter-intuitiveness of that position, still leaves me skeptical (concerning consistency and predictability across multiple systems, as well as price/performance correlation, not concerning the existence of differences!).

Also, it should be kept in mind that comparison of multiple complete sets of power cords in a given system, at a given location, does not provide data points relevant to proving consistency or predictability of the effects of those cords across differing ac line conditions, including differences in line voltages, line noise, and line distortion conditions that are likely to be encountered at differing locations.
08-20-11: Zaikesman
… though I did wonder why you omitted capacitance -- I'm sure you have a reason and will explain it
I didn’t mention capacitance because I would not expect its effects to be quantitatively significant in a power cord application. Even if they were, I would expect those effects to only occur at very high rf frequencies, causing them to be, once again, unpredictable, inconsistent, and system and setup dependent.

Best regards,
-- Al