Has anyone experienced any noise from their Bmax preamp that sounds like a noise gate opening and closing only when your playing? I bought this unit a few weeks ago and didn't really notice the noise through my bass cabinet, but running D.I. out to the board it is very noticeable. I cut the highs back on that channel and it helped a little, but it's still there. Even if I just slide my hands across the strings I can hear it. Annoying.