I was wasting everyone's time again posting about efficiency in speaker design and amp power vs quality, in another thread.

I got to thinking, now that anything that improves sound is fair game, at least to a small dedicated segment of audio fans (that includes us, I think), is a rethinking of field coil speakers desirable? For all I know they might have desirable properties. I'm sure any undesirable tendencies could be engineered out. Look what JBL has done with ferrite, which Greg Timbers has labeled a "lousy," I think it was, material to make speaker magnets from.

What would be the advantages of field coil, if any, especially in an era of expensive Alnico?

Clark in Peoria