APJ-1 Pro-active pickups show a single 9-volt battery. Can you wire another in series to get 18V for these pickups without ruining them? Does this actually get you anything with these APJ-1s?
OK, nothing so technical as tone. It's about the wiring. I got the APJ-1 (Pro-Active) BassLines. In the box came FOUR pots. (Can't find a cap though.) This is good because my bass (Ibanez GRB200) has four pots. But the wiring diagrams (that came with the pickup and also online) show only...