2Connecting and Using a Source Device
2.2.4 Connecting to Headphones
Do not connect the power cable before connecting all other cables.
Ensure you connect a source device first before connecting the power cable.
1Connect an audio output device such as headphones to [ 
] port on the product.
The sound could only be heard when you video card's ports support audio out.
Provided ports may vary depending on the product.
2 Connecting and Using a Source Device 38