High-end preamplifier, DAC, headphone amplifier. The Pre Box RS2 Digital is the larger sibling of the award-winning and innovative Pre Box S2 Digital. It uses the same excellent DAC brands as the S2 version, proving once again that the Pre Box S2 Digital was already at the top of high-spec DACs and absolutely beyond the competition. Based on the same fundamental design principles, the feature set is expanded and driven to new heights.