There is always something futuristic about R2R, so the R2R EF400 is not exactly out of type for HIFIMAN whose spirit for innovation spurred them to develop this DAC/amp.
It's on Headfonia's Recommended Buys list as "one of the best all-in-ones". Headfonics concur EF400 is a huge crowd pleaser. It's an Audiophilia Star Component.
Taking the company's discrete R2R Himalaya DAC and slapping on a 4.4 watt per channel amplifier, EF400 is HIFIMAN's claim that they are all you'll need to run a complete personal audio chain on your desktop. [See Product Desc. For More]