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.
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.
EF400 wildly outperformed Ear Fidelity's expectations who didn't expect HIFIMAN's pedigree at building great headphones to extend to an amplification system.
Disregarding its entry-level standing, this diminutive powerhouse is a statement of technological ambition from China's leading headphone manufacturers, changing the game by equipping all levels of Head-Fi with an extremely capable source. [See Product Desc. For More]