10 Audio Cable Myths and Facts



In a sea of audio cable industry snake oil, we’re sure you’re wondering, What really matters when buying cables?Save your money by avoiding overpriced cables with outlandish claims. Below are some common myths to look out for and some important things to consider when buying audio cables.
 
CABLE MYTHS1. Conductor skin effect

In some applications like power transmission lines, an electric signal tends to travel through the surface of a conductor and avoids traveling through the center of the conductor. Many cable companies claim that their design limits the skin effect and measurably improves your sound.

The TruthWhile skin effect is a very real issue for large scale power transmission, audio signals are in such a low-frequency range that the skin effect is negligible at best. The skin effect is only an issue in high-frequency applications. 20kHz is the highest frequency that humans can hear. If we calculate the skin effect on a 12 AWG speaker cable like Gene from Audioholics does in this article, we find that the skin effect results in a loss of only -.014dB. Your speakers, room acoustics, and the human ear have a much larger effect on your sound than the skin effect.
2. Cable break-in

Don’t be fooled - any company that claims this thinks they can trick you into hearing better sound after a month or two. “Break-in” is a commonly used term throughout the industry. It is the idea that the dielectric of a cable changes and aligns itself to the electromagnetic field of the signal traveling through the conductors.

The Truth

There is no scientific evidence to support the idea of cable break-in, but there are still those who claim it improves sonic qualities. We’re not against optimism. We’re just not full of crap. Don’t drink the audio industry kool-aid and save your money for legitimate cables.
 

3. Cryogenic treatment

Cryogenic treatment is the process of freezing cables to -320 degrees Fahrenheit before use. The claim is that freezing the conductors of the cable at ultra low temperatures aligns the crystalline grain structure of them resulting in desirable improvements.

The Truth

Again there is no scientific data to support this notion. Cryogenic treatment can improve the durability of certain metals, usually steel, by stabilizing impurities. For example, the process is used to create strong tools or car parts.  

But, steel is a terrible metal to use for audio cables. It is one of the least conductive metals out there! Copper and silver are the best conductors of electricity and the preferred metals for audio cables.


4. Cable signal direction

You might hear this phrase tossed around quite a bit. It’s the notion that a cable has an established signal direction, the direction in which it was initially used, and that this signal direction should not be reversed.

The Truth

The reality is, assuming the connector ends and terminals are the same, the cable will work in both directions and the performance will be equivalent.

5. Cable elevators, risers, or lifts

 

The claim is that the cables’ magnetic field can interfere with the surface it is laying on. Essentially, the magnetic field can “reflect” from the surface back into the cable and cause distortions.

 

The Truth

There is no evidence to support these claims, and these unnecessary devices are merely for looks. They are in no way proven to improve cable performance.  

    CABLE FACTS1. Shielding is Important

    In the modern age, wireless signals are all around us all the time. The rapid growth and spread of technology means that these wireless signals will become more widespread and more likely to cause unwanted interference. Cellphones, wifi, and Bluetooth signals can enter your cables, but shielding can block these signals and preserve your sound quality.

    2. Length is a Factor

    No matter how well a cable is designed, cable length will always impact performance. As the length of a cable goes up, so does the risk of unwanted interference and signal loss. We always recommend keeping your cables as short as possible, but we understand that is not always possible. A well constructed and shielded cable will help combat this issue.

      3. Conductor material plays a role

      The best conductors to use for audio cables are pure silver or pure copper. Both are valued for their high conductivity, but copper is more widely used due to the high price of silver. Additionally, some variations are constructed with silver-plated copper. However, because the metals have different conductivities, the sound is more likely to travel through only the silver plating and not the copper.

      The purity of the conductor will affect performance more than anything. Look for Oxygen-Free High Conductivity (OFHC) conductors. This means that a significant percentage of oxygen and other impurities have been removed from the conductor resulting in high purity.  

      4. Wire gauge should not be overlooked

      The amount of wattage your system is using will determine the total gauge size needed for safe and optimal performance. The standard is 14 gauge wire minimum for the transmission of 250 watts of power. Many electronic devices use much less than this, but some speakers and listening setups may be using more. If your system uses more than 250 Watts, we recommend a higher total gauge cable.

      5. Quality connectors matter

      Truly, the best connectors are no connectors at all. But, if you can’t hardwire your system, gold plated connectors are the industry standard. Gold plating exhibits great corrosion resistance when exposed to oxygen and has good conductive properties. Connectors range from basic to extremely high end and flashy.

      The bottom line is:
      Choose connectors based on your personal needs and the type of connection being made. Overall, always choose quality connectors.  

      We hope these myths and facts will help you choose quality, reasonably priced cables to complete your listening room, studio, or whatever your setup may be.

      Share your setup with us in the comments below!

      128x128shieldedaudio

      Showing 7 responses by cd318

      Good article.

      Perhaps you might have added a few words on capacitance, resistance and inductance and possible amplifier / loudspeaker interaction.

      Perhaps they don't matter much, perhaps they do. I remember NAIM used to stipulate using their own branded speakers cables.

      Was that just another early cable scam? If so, shame on NAIM.

      In any case no cable designer or seller, of any kind (power, speaker, interconnects etc) has ever claimed superiority over OFC copper in anything remotely measurable.

      They just don't, it's all kind of hinted at / implied.

      As for shielding, it may or may not matter. I don't know.

      In my current setup I haven't noticed any issues, but when I used to run a NAIM setup I'd get the odd CB/ police radio interference through my speakers.

      No idea to this day as to why that would happen or whether it still happens on modern NAIM amplifiers.






      steakster,

      "Any business person knows that the marketplace determines the success of a product. Wikipedia: Ford Edsel

      Belden - Iconoclast
      Furutech
      Cardas
      Nordost
      Purist
      MIT
      Transparent
      Stereovox - Black Cat
      Acoustic Zen
      . . . and more

      All these cable companies have been in business for decades. Each company has customers from around the world. Each customer has a different system - and different hearing capabilities.

      And you’re accusing them all of lying. Wow!"


      As I've said before, these cable companies do not, and as far as I know ever have, claimed one iota of superiority in either electrical or sonic performance over any decent copper cable.

      Therefore it's simply not possible to accuse them of lying (or more to the point - challenging them in court).

      No, they simply imply some nebulous quality often backed up by advertising, sleeve design and most importantly, price. 

      We all know that more expensive items must be better, right?

      That's it, once the touchpaper is lit it's simply a question of standing back and counting the money. Their work is done -the rest is down to the dealer and the listener's hungry imagination. 

      Some few might bite and many others will not. As far as science is concerned nothing has changed. The cable manufacturers know this perfectly well and remain tight-lipped.

      Their work is done - until the next advertising / marketing facelift is required of course. 

      Which it inevitably will be, you can bet on it.




      Here's a recent discussion between two audio journalists upon the existence of snake oil in audio.

      My take on it was that the irritatingly impatient John Darko was continuously attempting to coerce the rather more ambivalent Jeff Dorgay (TONEAudio Magazine) into a blanket condemnation of virtually all accusations of snake oil in the industry.

      Dorgay to his credit refuses to bite and maintains a reasonable perspective.

      Darko on the other hand manages to forever darken his reputation as an audio journalist in my estimation.

      You may feel differently.

      I'll admit it's not the most rivetting of podcasts but it could certainly help pass the time during the more mundane lockdown chores.

      https://soundcloud.com/johnhdarko/20-snake-oil


      Cable debates have been going on for decades, and it would be easy to dismiss this just as another one in a seemingly endless line.

      However this one is different in that this is a rare (first ever?) occurrence of a cable manufacturer pointing out some of the obvious myths surrounding cable performance.

      Talk about giving the game away! 

      I applaud their honesty but also fear that Shielded Audio will probably now miss out on an invitation to the annual cable makers convention bash. 

      https://shieldedaudio.com/


      Before we continue to go around in semantic circles getting lost along the way why don’t we have a look at this recent post.

      http://archimago.blogspot.com/2020/04/measurements-nb-cables-vigilante.html?m=1

      Archimago goes into more thorough testing and analysis than I suspect anyone here would care to. So what does he have to say?

      The entire article is just one more example of crystal lucidity in an area where it’s all too easy to get lost in deflections.

      For those without the time to check the whole article here are his findings.



      " V. Conclusions

      Seriously folks, as you can see, there’s not much difference to find when measuring speaker cables unless we’re looking at something with exotic construction (like the Slinkylinks). I honestly cannot be excited by hype about special geometries, materials like silver vs. copper, audible differences with dielectrics, etc. (remember the comment about this in Vincent Verdult’s book I mentioned last week).

      Ultimately, as a "component", speaker cable performance is governed by the basic LCR electrical values connecting amplifier and speaker - electrons don’t care if you spent $10 or $10,000. As usual, the ideal is to have "no speaker cable", so aim for lowest resistance, inductance, and capacitance in that order as discussed a few weeks back. Each parameter is already typically very low with reasonable cables.

      If you’re starting out and want to get some cheap cables of normal length (like <25 feet), go for some inexpensive 12AWG OFC zip-cord like the KnuKonceptz Kord measured last time or some AmazonBasics 12AWG OFC probably would be great (I only measured the 14AWG version which was fine).

      If you want to spend a few more dollars for higher quality and professionally made cables, by all means grab the very reasonably-priced cables I measured in this post like the NB Cables "The Vigilantes", Raymond Cables if you can find them, or make some Canare 4S11 cables with good connectors (or get the Blue Jeans 4S11 pre-made). Make some Archimago’s Colorful Cables if you want :-). These all sound as good as anything out there, can look beautiful, and IMO there’s no way you can improve on the sound unless you purposely want speaker cables with LCR values high enough to affect insertion loss, alter frequency response or ultra-high capacitance to risk high frequency oscillation!

      The only situations I can think of where there might be a need for special types of speaker cables are if you need shielded wires in noisy environments to reduce picking up interference (check out some coaxial Mogami 3082’s, 14AWG, like these), or if you need SpeakOn connector cables used primarily in the pro audio world."

      prof,

      "Ah, the logic of the Golden Ears. "If only you my had ears to hear!"

      Millercarbon, I’d like to enlighten you: You should try swapping your expensive cables for radio shack zip cord, and get rid of all those cable risers.

      When you do you SHOULD be able to hear the addition of timbral accuracy, harmonic richness, purer highs and extended soundstage and transparency.

      I can hear it. It’s just AMAZING. They MUST have put something special in that zip cord because, whatever you may say it’s made of or however it measures, the ultimate test is HOW IT SOUNDS and my ears don’t lie! It finally releases the potential of a hi-fi system.

      If you try the zip cord and don’t hear the exquisite upgrade in sound I hear...it can only mean you have not developed the requisite listening skills. And I feel sorry for you. Keep listening, keep improving your skills, and maybe one day you will join us in the Platinum Ears Club.

      ;-)"




      Ah yes, these wonderful cable threads defy all logic, don’t they, as they oscillate between what Neil deGrasse Tyson calls personal truth and objective truth.

      He also mentions a third form, political truth - but that one might be better left for Coronavirus/conspiracy threads.

      Personal truth is all well and fine in audio, but all too often when it’s presented as objective truth there is nothing else than personal opinion to back it up. Who needs to look at resistance, inductance and capacitance when you can muddy the waters with the ephemeral 'skin effect' and unproven directionality?

      By the way prof I understand your zip cord is obviously phenomenal sound wise, it must be because you told us, but is it directional (just in case), and what insulation material does it use?

      Would cable risers elevate the sound further?

      Sorry.

      https://youtu.be/TDoufL_Uf4Q


      cleeds,

      Well I think prof's balloon bursting satire is as hilarious as The Life of Brian. YMMV.

      Of course I would readily be the first to apologise to prof if it somehow turned out he was being serious!

      You see with all cable debates it's not always easy to tell.

      The objective truth (scientific) seems to be unpalatable to some but a personal truth is often a tricky cove, and can lead to all kinds of neverending conflicts as we see all around us.


      heaudio123,

      No apologies needed.

      There will many here who appreciate your input - and that's all that counts.

      We visit some, we read some, we skip some, and we might take away some.