howdy: i just scored an american deluxe jazz bass, not the model fender makes now, but one from about 10 yrs ago, i think. here's a link to some pictures of it: http://www.tdpri.com/forum/bass-place/367727-nbd.html i am mixed up about these knobs: the one closest to the neck is a master volume. next is a knob that pans between pick-ups (i think). the next is a stacked knob and i ain't got a clue. last is a smaller knob and it mystifies me also. it just seems to lower the volume, tho not all the way. the bass has active pick-ups and i don't know alot about them, either. they say "scn" in tiny letters. any enlightenment you care to share is appreciated!