AUNE X1 SE 24BIT/192K DSD mini ADACK USB DAC Headphone Amplifier Pre-AMP 24BIT USB DAC function - this function is the upgrade of Mk2 version. Adopts TE TE7022 to reach computer voice signal receiving part, through USB interface receives computer signal directly, using I2S output via the same as TI PCM1793 produced by DAC chip for decoding, and then the Line Out or expander ear sound output. 24bit/192K DAC: Provided with a coaxial digital input, using the ratio as low as 5PS WM8805 receiver chip, by coaxial line receives from the CD/DVD and 24BIT player digital signal can be passed to the machine's DAC chip PCM1793 as decoding. Headphone AMP: Ear expanding part adopts OP+BUF frame line and be improved, except for a sound card, DAC expander ear, but also external large equipment using Omron signal dedicated relay (Relay ) signal set change, by Line In ( RCA a ) input external analog signal (Analog ) such as CD/ DVD machine. the existing DAC analog signal, and even the IPod sound output ( requires adapter through the Lineout output signal ) when changing for better power, the machine will further enhance the sound expander ear. Pre-AMP:This feature of Aune X1 MK2 has special function, can independently charge current level in the same machine, LINE IN to line OUT volume control, and may choose to DAC output volume controllable, all controlled by single chip microcomput