Yes. You connect your source to your DAC (probably using USB) and connect the DAC to your Hegel 300 Integrated amp using balanced inputs (or RCA). You need to change your source on the Hegel from its internal DAC to an external DAC.
Adding a DAC
Being the sick old audio person I am
I have been contemplating adding a PS Audio or ARC DAC to my system. I am running a Hegel 300 Integrated amp that has a DAC built into the unit. Can I add an outside unit to the system and quit using the Hegels DAC section? Thanks all.