ASUS Xonar Essence STX II 7.1 Sound Card @ techPowerUp
 

ASUS marked their entry into the high-end sound card market with the Xonar Essence ST some years ago. Today, we will take a good look at the new STX II. The STX II brings new op-amps and a more precise clock generator to the table; the latter should lower jitter. The STX II also bolsters 7.1 outputs through a small break-out card.

http://www.techpowerup.com/reviews/A...ssence_STX_II/