hi, i just bought this headphone recently. just wondering if any owner out there encounter a problem of having some annoying squeaking sound (coming out from between the headband and the ear-cups) whenever there are slight movements? just a slight turn of my head will result in some crackling squeaking annoyance.

somehow, the edifier H840 version doesnt have this problem. i thought it would be the same for H850.

is this a known problem? or did i just got myself a lemon unit? 
[attachmentid=4360074]