The DAC 8 is more than just a converter. It has a built-in volume control and balanced XLR and single-ended analogue outputs too. This means it can also be the preamp in an all-digital system. Connect it to a stand-alone power amplifier or a pair of active speakers, and off you go.
This kind of approach simplifies the signal path: the signal doesn’t need to travel through a couple of meters of interconnect and through the circuitry of a dedicated analogue preamp – all of which holds the promise of better sound quality. It reduces the cost, too. It’s not often a possible improvement of sound goes together with a lower price tag.