I recently acquired a Sansamp Bass Driver D.I., and it's incredibly noisy (hissing) if I turn up the Drive setting above about 25%. Anyone else had this experience with this pedal? Is this normal? My bass is an Ibanez EDB700, which has active pups. The noise all seems to come from the Sansamp, as the noise is present whether I'm playing or not, and its volume remains consistent regardless of the volume setting on my bass. It also doesn't seem to be my amp, as I've plugged the Sansamp into a mixing board via XLR, and the noise is there too. Anybody think I have a defective unit, or is this thing just noisy? I've read and heard so many good things about this unit that I'm kinda surprised about the noise.