Raul,
I answered your question in my post of 9/27. Please read it before repeating questions that have already been addressed.
Paul's education and 22 years of professional experience qualify him to understand whether coils can be magnetized. He knows more atomic and molecular level metallurgy than all the audio engineers on the planet. He says it's possible, even probable.
What are your qualifications in metallurgy? Your "common sense" is of little use in understanding metals at the molecular level. It is of no use in understanding ANY material at atomic or sub-atomic levels. Common sense Newtonian physics just don't apply there.
BTW, suggesting that what every person on this thread hears as an improvement is "distortion" is arrogant, absurd and insulting. You haven't heard what we have, so your "common sense" should have deleted that statement before you posted it.
Doug