Fiio E07K Andes USB DAC and Portable Headphone Amplifier Black TI PCM2706 USB receiver, 48 kHz 16-bit support for Windows XP/2000/Vista/7 and Mac OS Wolfson WM8740 DAC, ADI AD8692 OP Amp and TI TPA6130A Power AMP High performance, excellent resolution, low distortion, and powerful output