Asus Xonar D1 - Manual (Page 17)

17 ASUS Xonar D1
5.2 Connecting Headphones
5.2.1 Connecting Stereo Headphones
No Item Description
1 Front Out/Headphone
Jack
The Front Out jack has a built-in high-quality amplifier to
drive headphones. Connect your stereo headphones directly
to this jack.
1