Anyone ever have problems with this ped? I installed a J-retro in my jazz bass and when now when I go to use my MXR phase 90 it doesn't even sound like its on. Sounded fine with all my other basses, including the jazz before the preamp install. I run a GK MB800 thru a BNA BASSIC 115. My controls on the amp are all at noon including the contour. Gain and volume to taste. The preamp has the highs at max, bass at the center notch, and the mids slightly boosted in the lower mids. Is it EQ, pre too hot, or maybe this particular model doesn't like active basses? Also FYI its a newer model, not vintage phase 90. Thanks!