I decided to upgrade the Op-amps in my Xonar Essence STX II, I bought 3 Dual Burson V5 discrete OP AMP’s and the sound quality is above anything I have heard from this card yet. My speaker system is a Klipsch Promedia 2.1, and my two headsets are the Astro A40 and the V-Moda M100’s.

Jonathan C.