Interesting theory but I just went through the 4 threads you linked to and found 18 people reporting the issue only 4 of which still reported it after a module replacement and of them 3 tried with the same cheap headphone.
Interesting theory but I just went through the 4 threads you linked to and found 18 people reporting the issue only 4 of which still reported it after a module replacement and of them 3 tried with the same cheap headphone.