There are three output options on the back of the Node --
- A pair of left and right analog outputs that use the internal DAC in the Node and connect to the right and left analog inputs of your amplifier.
- one coax and one optical digital output, either one of which can be connected to the input of an external DAC. Then the analog outputs of the DAC are connected to your amp.
Check out the images of the Node on a site like crutchfield.com