AKG K701 + FiiO E7/E9

FiiO E7 portable headphone amplifier with USB audio decoder (DAC). This product is designed to replace PC on board sound card that do not have enough output power for higher-end headphone. With USB audio decoding, amplification and audio output, E7 can serve as both a professional headphone amplifier as well as an external USB sound card. - TI PCM2706 USB receiver, 48kHz 16-bit support for Windows XP/2000/Vis... more