K0ruptS0uLaccording to the power rating it should no problem. I haven't used the amp or the headphones so can't tell you for sure. wish massdrop would answer these questions for the stuff they sell. look it up on YouTube if you want see what it does. there are a couple good reviews on there.
K0ruptS0uLI have hd800 with SDR mod and the X1s with X7s and use Sennheisers XLR balanced cable and find it to be my favourite solid state rig to hear the 800's on, depending on the recording I will listen at between five to and five past on the volume with the gain set at minimum, 0db... so plenty of power to spare!