Hello everyone! I'm new to this forum, and an intermediate bass-player. This thread concerns the Seymour-duncan SPB-3 Quarter-Pound for P-Bass or SPB-2 Hot for P-Bass. I have a Fender Squire p-bass, mid-'90's model (it sounds quite good and I'm on a budget!). The only thing I think is wrong with it is the machine heads and the pickups. So, I've decided to upgrade the pickups. That's why I'm here! Right, it's a passive bass, and currently has the crappy standard economy-pickups in. I've been told SD are a good brand of pickup, and so I;ve been looking at upgrading them to the above SD pickups. Passive, of course. Which one would I be best of using? I want a nice toney sound with a little crunch, but the ability to go deep. Also, whilst looking at the info of these pickups, it says: "Complete setup: Often used together with STC-3M3 and -3M4 Tone Circuits for optimal tonal control." What does this mean? I'm assuming it's something to do with the active range. Anyhow, thanks for reading this thread, and any help will be highly appriciated. Cheers y'all.