This is pretty old headphone amp/dac tech. 5 years ago Pico was at the top of their game, but I really never hear about them any longer in the head-fi circles. Compared to the plethora of modern and more advanced tech offerings in this category, can anyone provide their opinion on the Pico gear offered here, compared to something like the Sony PHA1A, FiiO A5 or even the Dragonfly Black? Does this Pico gear still stand the test of time, compared to the newer stuff out there?