I purchased an E17 for use with my HD598's... I've currently got the E17 hooked up via USB to my PC, and have the E17 in USB-mode. The mixer in Windows shows there is sound playing, yet I cannot hear anything.
OS: Win7 x64
MB: ASUS M4A87TD-USB3 (AM3 socket)
CPU: Phenom II X4 955
I have ASIO4All installed, as well as FiiO's E17 drivers (FiiO USB DAC-E17 ACPL)