High Efficiency Speaker Asylum

Need speakers that can rock with just one watt? You found da place.

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Field coil vs permanent magnet -Fundamental differences besides the obvious?

Posted by mac55 on July 19, 2009 at 15:38:20:
I am only beginning to learn something about field coil speakers. My question is, beyond the obvious difference in how the magnetic field is generated, what other things differentiate these two speaker types?

Do field coil speakers present a different kind of sound?

Are they always deeper or steeper in cone angle? Those few I have seen are very deep.

Any deeper insight into field coil speakers would be welcome.