A pair of tiny coils are mounted so that they can rock about an axis between the pole pieces of a magnet. Each responds only to one plane of stylus movement. To minimize mass, the coils have few turns and so are low impedance and give low output; they thus need special pre-amps or transformers. Some have been produced using many turns of very fine wire, thereby giving higher impedance and output.
"I got a chance to listen to the CD last night and I am very, very impressed with the contents. I think you spent a lot of time with the one song I was most interested in, "You + Me = Love", and it really shows. The percussion instruments sound so clear, it makes the song sound fresh and alive. After listening to the same song over and over ..."