Just put one of these circuits in my Eb4l (has a rear pickup).Tried it at a gig-most useful for getting a dubby sound ,i dial it down to 2 for that.Some things i noticed about it -there is a residual midrange cut even on 10,so i added a switch.With the 0.1 uf cap there is a small ammount of cut in the fundamental range,so i have used a 0.047uf cap and that worked for me.
