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
      Gosh, the top 50. No kidding? At least milk didn’t squirt out of his nose. 😤
      Wow, some scary stuff in here. People believing a copper wire has a direction, others saying they don’t care or believe science... I was starting to get the vibe there are a lot of arm-chair Electrical engineers around here, and maybe few Santeria practitioners as well but damn...

      Quality product is a real thing but when you throw the science out... Got a friend who has been an EE professor for 25 years at a top 50 school. I showed this thread to him and he said, "There’s an old quote, ’There are three scales of intelligence, one which understands by itself, a second which understands what is shown it by others, and a third which understands neither by itself nor on the showing of others’. Here, we have the last scale."

      I concur.

      So what scale of intelligence is it where you're not even smart enough to know you're barking up the wrong tree?
      I wish there is a 'like' button as in Facebook or in 
      Twitter. If there was, Geoff's last post would surely have gotten one clicked by me.

      - Sam
      “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.”


      I have a cable break-in story from yesterday. I wanted to try out a new headphone amplifier because I wasn’t getting the volume I wanted out of my current setup. After trying the headphone amp and realizing I didn’t like it (it got louder but it didn’t sound as good), I went back to my old setup which involved making a couple changes to some interconnects and headphone cable after removing the amp from the chain.

      I was now back at the exact same setup I have been listening to for weeks. Whereas I could turn the volume knob to maximum and enjoy the music before, now I couldn’t even turn it up halfway without being repulsed by the sound. It’s was so harsh it hurt my ears!

      I let the system play overnight and now I can turn the volume to max and enjoy the sound. In this scenario, I don’t think the cables themselves were breaking in as they have already been played for 100s of hours. I strongly suspect that the new copper to copper connections inside the RCA connector had to “settle in” in some manner.

      shieldedaudio "The bottom line is: Choose connectors based on your personal needs and the type of connection being made."

      That is very helpful advice so what you are saying is if a cable in your Music Reproduction System is going to be replaced and it currently uses "RCA" type plugs then it's replacement should also use "RCA" type plugs and not "XLR" type plugs or "Schuko" type plugs or "CAMAC" type plugs but always use what was their first!