I was reading about a recent Jackson Dave Ellefson signature model. Mr E said this
"I went back in time with the P/J setup. The very first Jackson basses that I got back in the day had that configuration, because I noticed that if you flipped the P pickup to the reverse position it got rid of an annoying low-mid frequency that just doesn’t work in a metal setting, because it gets the bass right down inside the kick drum."
Which sounds very much like a good thing; when, then, would a reverse P not be wanted?
From what he's saying I'm guessing that when a P is reversed, the two halves swap positions on the string. Is this always the case, or are there instances when one half stays in place and the other half gets moved to the other side of it?
(True fact: Dave Ellefson was born and raised in a town called Jackson)