Good day dear sir/madam! I barely hope You to help me obtain any theoretical “How to” information about headphones DIY and hints to constructing it in general. Any useful links will be appreciated. In a first step to build my own headphones I've tried to find this kind of information, but...

I bought today this headphons and doesn't find some information about modding this one, or another usefull information about  this headphons totaly. Anyway in russianspeaking part of Internet(i'm from Ukraine), here i'm fast find this themes...