i have a piggy bank that a little bigger than my head .. i set the cans on it for a few days.. it sure helps but the clamping force returns after a while... don't know what else to do

my pair also has the 2012-2015 sticker.  do anyone know about these being counterfeited? have anyone ever seen one??? 

Update:   - so i have been playing my PL through ath-a900x for over 30hrs at 100% volume for the last 10hrs. I'll try to provide some of my impressions with the pair with the least technical words possible.   a.  bass/low: the bass has been improved a lot compare to out of the box and it...