cegras
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Cold working copper to 1% strain reduces conductivity by a factor of 100.
Cold working your interconnects can reduce conductivity by 2 to 3 times.
And how does this affect the sound?
Cold working copper to 1% strain reduces conductivity by a factor of 100.
And I'm not sure where you are getting that info, but between coarse grained Cu and nanocrystalline Cu there is about an order of magnitude difference in the conductivity, not 2.
Just look at this paper about differences in conductivity due to twinning in nanocrystalline Cu
http://www.synl.ac.cn/org/mat/llu/PDF/japchen201006010686.pdf
It could be urban legend, but I have heard of people replacing speaker cables after they were accidentally stepped on.
Considering you are using drawn wire, there are already a massive amount of dislocations present...
Creates dislocations in the crystal lattice which reduces the electron mean free path and hence reduces conductivity.