- The Setup - Source: PC|USB USB DDC: Singxer SU-1 DAC: DENAFRIPS Venus Amp: Mjolnir Audio KGSSHV Carbon Headphone: Stax SR-009 The Denafrips Venus represents a very impressive value in R2R DACs. Using trickled down technology from the flagship terminator, it comes in at under $3,000 and what you get for this price are some of the most precision matched resistor ladders in the business (one of the most crucial points for an R2R DAC), true balanced design with four R2R network