Hi, I',m fairly new to the whole pickups thing, I want some custom pickups but theres a couple things I'd like to know: Why do some basses have two identical (looking) pickups? A Wal bass has two pickups, are they different tonally? Does the difference in tone come from their positions, something internal, or both? Obviously they each have their own tone control and can be blended, giving a much larger range of tones than one, but both set flat, what is the reason for having two? It could obviously be all of these things. But maybe 1 pickup is often the treble pickup while the other is the bass pickup, idk, is that the case? Thanks.