ASUS showed off a brand new two channel audio card called the XONAR Stereo X with a built in 1/4 inch (6.5mm) headphone plug built specifically for serious headphone audiophiles. The card drives the headphone jack with a full 1 watt amplifier so that your highest end cans will sound just right. The card also features full left and right channel RCA outputs for plugging into your favourite tube or high end two channel amplifier.
Based on the same AV100 chip that the other XONAR cards use, it also features a 120db S/N ratio. The only thing missing were the tubes onboard.