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ko403ok
26
Jan 4, 2019
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High-end power cables take the longest time to break in, due to the thickness of the wires.
Jan 4, 2019
siikanen
18
Jan 4, 2019
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How do you measure power cable break in?
Jan 4, 2019
OllieTheBear
41
Jan 9, 2019
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I suggest put rubber boots on and stopm them. I’ll brake the cable in faster
Jan 9, 2019
DanTreview
138
Jan 10, 2019
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I bet $50 some audiofoole out there has tried this....
Jan 10, 2019
OllieTheBear
41
Jan 10, 2019
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I can’t speak for headphones burning, but “cable burning” just comfirms that there are large amounts of BS in our hobby
Jan 10, 2019
ko403ok
26
Jan 11, 2019
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Morrow is the only one I'm aware of that offers AC power cable break in. That said, it took fully two months for CruzFirst M-1s to settle into my system.  O boy, the waiting was worth all the patience.
Jan 11, 2019
verifonix
744
Jan 12, 2019
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God damn you sound like the exact person this shit is aimed at..
Jan 12, 2019
OllieTheBear
41
Jan 12, 2019
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It’s all mental in my opinion. I am an electrician and I know for sure that cables don’t change unless there is a physical or chemical intervention. Assuming that audio cables are not exposed ro corrosive environment or stopmed on. Running low voltage/low current does not change the inner composure of the cable therefore it wouldn’t change the resistance of the material. Other electrical components such as tubes or bulbs do change with time as a result of constant heating/cooling. A tube amp needs it’s tubes replaced as they deteriorate over time and sound will change. Cables do not IMHO
Jan 12, 2019
DanTreview
138
Jan 12, 2019
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From the horse's mouth! 👍👍👍
Jan 12, 2019
ko403ok
26
Jan 12, 2019
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Verifonix has said, "After unboxing, I listened to it for 15 minutes and left them plugged in to allow them to burn in. After 50 hours of burn-in, some harshness that was there was gone and the sound signature seems settled." Burn- in.  Settled. Is there anything else you'd like add?
Jan 12, 2019
verifonix
744
Jan 13, 2019
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What's that got to do with thousand dollar power cables though?
Jan 13, 2019
jeremya
54
Jan 28, 2019
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One of the best theories I’ve heard to explain the burn-in phenomenon of cables is the slow changes in the molecular grain orientation of the cable material as electricity passes through it, much like water running over a riverbed (the stones which are rough at first become smooth over time, thus decreasing turbulence): See: https://en.m.wikipedia.org/wiki/Grain_boundary Particularly the part about “Effect to the electronic structure”: “In the case of metals grain boundaries increase the resistivity as the size of the grains relative to the mean free path of other scatters becomes significant.” The aggregate resistivity (the sum of all resistance within the cable) may not change appreciably, but the accuracy of transient information (electrons arriving in the same order and tempo as they were transmitted) may be effected slightly by the grain structure (as localities of tiny resistance, those rough-edged rocks in the stream, are re-aligned or smoothed over)... which translates into “smearing” as some have described it. The brain is incredibly sensitive to timing.
(Edited)
Jan 28, 2019
DanTreview
138
Jan 29, 2019
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And yet this phenomenon seems only to exist within the audio cabling world... I wonder if NASA builds a spacecraft worrying that it won't work after launch because the cables inside it are not burned in. Or if Honda freaks out because of all the meters and meters of cabling inside the Prius aren't burned in yet. [ad infinitum] I'm not saying it isn't real, but man, I find it strikingly odd that I never hear so much as a mouse fart's amount on "cable burn in" within any other type of electronic enthusiast circle...
Jan 29, 2019
jeremya
54
Feb 6, 2019
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I can think of a couple reasons:
  1. The systems and machines you describe are purposefully engineered with very different tolerances than the human auditory system. Most of our modern machines are based on logic circuits, and very few of their systems would be built with highly discriminatory circuits requiring precise sampling of analog inputs with extreme time domain sensitivity (radar, radio, and other communication systems, along with some telemetry gatherers, are possible exceptions here — but how many of these are closed systems that deal with highly repeatable phenomena?).
  2. Logic circuits are built around a system of checks for voltage within a certain rage (“do I see 5V +/- 1V? If yes, engage function. Otherwise, ignore it, or do something else instead.”). The tolerance is required because the electrical systems in these environments (particularly cars) are often quite turbulent. Inaccuracy is therefore built into the equation; however, when sensitivity (fidelity) demand increases, tolerance decrease.
For systems that require extremely high fidelity, the government and the medical industry have actually turned to high-end cable manufacturers (or in some cases, high-end audio manufacturers grew out of their early days experiences manufacturing extremely precise wire for hire):
  • Shunyata has posted videos on YouTube discussing the use of their cabling to ensure the proper performance of ultra-sensitive medical equipment.
  • It’s ironic that you used NASA as an example, because Nordost cut their teeth building precision cabling for the space shuttle program. :^) It was after the challenge of that project (and other aerospace ventures) that the founder of Nordost decided he could take what they had learned and apply it to rewiring his home audio system... and shortly thereafter the company pivoted into the hifi space.
In certain applications a bunch of bulk copper wire just isn’t accurate or reliable enough. Human hearing seems to be one of those. We have enough of our own built in tolerance to go “yep, that sounds like a cello!” but we also have the sensitivity to know “hey, that sounds like a recording of Yo-Yo Ma playing cello in a room about yay big and I can almost see what the bow looks like as it draws across the strings. Wow!” and even, “my eyes must be playing tricks on me, because Yo-Yo Ma is *in my living room* but he’s invisible! No, seriously, he’s right there! And my living room is also the Opera House!” That’s the difference great wire sufficiently run-in can make, all other things being equal. I might characterize the last two as the difference between excellent cable that’s straight off the shelf and the same cable with 100-200 hours of recent playtime on it.
(Edited)
Feb 6, 2019
DanTreview
138
Feb 6, 2019
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Feb 6, 2019
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