MATRIX M-Stage HPA-3U Class A Headphone Amp USB DAC 24bit 192kHz DSD XMOS Stable XMOS U series USB controller on the new USB module, support 24 bit/192kHz sample rate PCM signal playback, DOP mode DSD playback Support iOS and most Android device Full-band of THD + N less than 0.0003%, SNR up to -112dB, bandwidth not less than 150k at -3dB gain biggest evolution since the M-Stage series headphone amplifier Best Selection Best Match -Alps 27 series volume potentiometer, Wima and Nichicon audio gradecapacitors, Noratel toroidal transformer, precision non-inductive resistance, each carefully selected components make HPA-3U