I'm a bit perplexed by this as I've multiple publications praising how responsive the unit is, but in my experience it is anything but. It seems that with this pedal I have to have the sensitivity all the way up and even then I have to play fairly aggressively to get the envelope to open all the way up. Bass Player Magazine was able to get the BEF to respond perfectly with a passive jazz bass and the sensitivity set to 2 o'clock and I can't do the same with an 18V active bass? I even sent the pedal back to MXR. When they tested the circuit, they said it was ok. They were even nice enough to replace the PCB anyways, but I still have the same problem. Ideas?