ASUS XONAR_EONE Digital-to-Analog Converter (Discontinued by Manufacturer) Hi-Fi audio via the worlds first 8x symmetrical upsampling Extreme audio clarity with 120dB SNR 11 swappable OP-amps for customizable tonal characters Built-in headphone amp powers up even 600 ohms impedance headphones Output Signal-to-Noise Ratio (A-Weighted) (Front-out): 120 dB Output THD+N at 1kHz (Front-out): 0.000316% (-110 dB) Frequency Response (-3dB, 24bit/192KHz input): 10 Hz to 48 KHz Chipset: Audio Processor - C-Media CM6631 High-Definition Sound Processor I/O Ports: Analog Output Jack - 2x 3.5mm RCA jack, 1x 6.3mm RCA jack , 2x Balanced Output (XLR), 2x Digital S/PDIF Input (1x Coaxial, 1x Toslink), 1x USB Input