i have a question about this pedal. ive had it collecting dust for a while here. decided to plug it in tonight with my upright to try out that vle filter. the filter is "ok", i can eq my sound better with the pz pre, but when i engage that boost, wow. does that thing do anything to your tone? its instant fatness. im running the pz pre into this pedal. even when i back off on the volume of the pz pre to compensate for the boost, so there is no net increase in volume, this thing fattens my sound and adds punch. is this supposed to happen, and if so, why?