Hi, I recently purchased a Radial X-Amp with high hopes on reamping. I connect my X-Amp to the guitar amp and no noise... all is good, then when I plug into the X-Amp's input from the Fireface's out (TRS>XLR) I get huge hum noise. Thats when the ground lift is engaged, when its not it sounds like a jet engine. Remember that this when I connect the X-Amp to the Fireface and no recorded DI's or DAW's are involved. Any ideas?, I really want to get going with Reamping!