Asus Xonar Essence One World's first USB digital-to-analog converter with 8x symmetrical upsampling and 120dB SNR<br /> <br /> -Hi-Fi audio through the world's first 8x symmetrical upsampling<br /> -Extreme audio clarity with 120dB SNR<br /> -Built-in headphone amp powers up even 600 ohms impedance headphones<br /> -11 swappable OP-amps for customizable tonal characters<br /> -Cleanest sound thanks to a dedicated internal power supply