Now, I did a little searching around, and I couldn't really find specific answers for my curiosity to be satisfied. I have a 2007 MIM Jazz Bass and I have been its only owner. It's completely stock (minus a replacement neck cause the first was a lemon but that's a different story.) I was curious what some simple and (relatively) cheap upgrades were that I could give it. My aim is to give it a little more thump (I know that I'll never be able to mimick a P-Bass with this, but it'd be nice to get closer.) I was talking with a friend and fellow bassist, who suggested I look into purchasing an S-1 switch, which changes the pickups from parallel to series and vice versa, but I really have no idea how it works. It's really a simple looking machine. Maple neck/rosewood top. Alder Body in Midnight Wine (which to my understanding were actually discontinued?) with a b/w/b pickguard. So, any little mods that wouldn't break my bank?