Asus Xonar Essence STU User Manual page 5

DC servo headphone output
Filters out unwanted pop noise
Many music enthusiasts choose to solder a DC
servo on their DAC to minimize power‐up pop
noise on the renowned TPA6120A2 headphone
amplifier. The dedicated DC servo on Xonar
Essence STU offers a convenient and solder‐
free alternative.
※ How to switch to DC servo headphone output mode?
1 Default setting:
non‐DC servo mode
● ●○
● ●○
2 Remove four
jumpers
○ ● ●
○ ● ●
Jumper switch
3 Place jumpers back on
pins as shown below
●○● ●○●
●○● ●○●
DC servo