I have 3 basses with lace sensor pickups. Love them! Your bass is a Jazz Plus. People really seem to dig those. I'm not a J fan, but I really like the J Plus. Did you do a complete setup? If not, do that before you do anything else. Here's a link to a manual: http://support.fender.com/manuals/in...03)_manual.pdf
I read your earlier thread, and if you're still wondering, the knobs are as follows - Volume/Pan, Bass/Treb, Four Setting Rotary Knob: "Off," Passive, Active and Active with adjustable mid boost
Best of luck, brother!