Asus Xonar HDAV1.3 - Manual (Page 20)

4 ASUS Xonar HDAV .3
5.2 Connecting Headphones
5.2.1 Connecting Stereo Headphones
Stereo RCA-to-3.5mm cable
The Left/Right Front Out ports have a built-in high-quality amplifier to drive headphones.
Connect your stereo headphones to the bundled stereo RCA-to-3.5mm cable, and then
connect the Left/Right ends to the to Front Left/Right Out ports on the Xonar HDAV card.
SPDIF Out
(Xonar HDAV card)
Front Right Out
Front Left Out