Never experienced it with any of my hifiman headphones i ever owned..the he300 (with pleather)/ 400 (pleather and velours) 500 (modulor pads and velours) and now the code-x with the huge leather pads...nothing..
BUT..i got customed from my darkvoice 337 tube amp period to always switch of the music first (leaving laptop on!), then put volume on amp on zero...and only then i take the phone off very carefull..not touching the pads OR the cups (its handfinished with a rare beewax method) so am careful not to touch it with my bare hands, so my sweaty hands cant deteriate the finish)...and only then i switch off laptop..and only after he closed down i disconnect laptop from wall socket....am very careful. Oh yeah..if i have some kind of gel in my hair, then i put a cap on between the headphones and my head
I am like this with all my stuff..thats why people are not afraid to buy stuff from me..as they know its as new.
so maybe it because of that i dont hear any popping?
Maybe its about ur headform that makes a better seal and so creates a vacuum, who knows? :rolleyes: