SMSL M6 32bit/384khz Hifi Audio USB DAC Digital to Analog Converter with Headphone Amplifier Black SMSL M6 is high quality DAC with headphone amplifier Uses chips AK4390EF/CM6631A JRC NJM2144D Inputs include USB, fiber optical and coaxial Outputs include RCA analog outputs and headphone jack 6.35mm USB asynchronous transfer up to 32bit / 384kHz