This "kingwa" person who does the design seems to know what he is doing. And when he says 'discrete' he really means it. There aren't even chip regulators there, but his own discrete designs. These in a $200 unit that seems very well built. I may have to bite the bullet with one of the DAC/headphone amps. Even the cheap ones use a parallel DAC design to take down the noise floor a bit further (two separate DAC's per stereo output).