Have anyone experienced with this pick up. I´m doing a pick up´s comparative in my RME Fireface 800 and I prefer this pick up over Realist Sounclip and Schertler Stat B (more clarity without too many mediums and highs), but make a lot of background noise. I feed it with the DI channel in Fireface, as with the others. Could it be a impedance problem? Thanks.