NeoDigits.com X3000 HD - Manual (Page 14)

Or
You can digital audio connection (coaxial / optical) or 5.1 channel connection to your AV
receiver
.
Connecting to Audio equipment
Connecting your HELIOS X3000 to your audio equipment (amplifier, AV receiver, etc)
A. Connecting to a 2 channel audio amplifier
Connect the video output of the player to the video input of your TV system using the
corresponding cable.
Connect the audio cable’s FL and FR to the sound input of the L/R socket on the
amplifier.
B. Connecting to a Digital audio receiver