Here's my setup Iamp 800's DI (XLR) to audiophile 2496 (RCA) When there both connected, I get background noise like you would not believe! The problem get's even trickier though: - I don't have the white noise when I hook the bass directly in to the card. The input is not that high though. This method takes the analog 2 input of the card. - The DI seems ok, checked it through a cheap headphone pre... any Idea?