Новейший китайский HiEnd DAC Audio-GD NFB-15.32
с усилителем для наушников (есть переключение высокого/низкого сопротивления).
Построен на основе 2х HiEnd Mono чипов
Wolfson WM8741 чип на канал,
без операционных усилителей. ASUS Xonar Essence One отдыхает.  

Fully balanced design built by discrete analog stages without any OPA and coupling caps in the signal channels.
Non- feedback ACSS analog output stage.
R-core transformers. 
Total of 7-groups dedicated power circuits and more than 38,000UF caps are used to purify the power supply. 
Four-channel digitally controlled relay-based volume control to avoid channel imbalance and improve sound quality. 
80 steps volume level control in both high gain mode and low gain mode. 160-step volume control ensures smooth control of the volume level.