This page is dedicated for Xonar hardware mods discussions.
If you wish to make a tutorial, I will publish it here with credits to the owner. You should submit your article at this e-mail address.
Also I will post any links that might be useful.
Articles and guides:
1) Xonar Essence STX Op Amp Upgrade by Adrian Tache
2) Modding Xonar cards by Con
Useful Links: –