How to fix/ disemble monster studio beats headphones?

Hi, My white monster studio beats by Dr. Dre have recently broken. They are okay at low/ mid volume but if you make them play music loudly they crackle and sound (particularly by music) almost flickers on and off. I wanted to open them seeing as i bought them off ebay and the warranty is useless (they are 100% genuine i'm certain) but i cant see a way in? Also, how do you put the ear pads back on after removing them? Thanks