Quote Originally Posted by walpurgis View Post
There are field coil phono cartridges too. I can't fathom the logic behind those either.
Yes, I think there is an Audio Note design that uses a field coil - and necessitates a specially wired (or modified) tonearm.

In a similar vein, I don't understand why Alnico magnets are preferred by some over rare earth magnets. A magnetic field is a magnetic field, why should its source make an audible difference?