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Dominic wrote:

i thought of it as soft and chalked it up to not being as strong a motor as was needed and begrudgingly accepted that perhaps 'field coil' did not mean 'powerful motor'. I'm starting to think otherwise…

Yes, it is exactly the point! Electromagnet is not a stronger or better motor it is juts different type or magnet. There are a dozen different Alnico magnets. All of them are combination of aluminum, nickel and cobalt but vary with some other ingredients added. There are different anisotropic grades of Alnico and they all sound different. Interesting that in may vintage drivers, the manufactures used whatever they have available and did not differentiated between the Alnico grates. However, the same driver with different Alnico grade produce different sound, practically at HF. Then there are Ceramic or (Ferrite) magnets. They also available in my grades but they have less sonic difference between the types. Let me to explain: the difference is mostly auditable at HF but Ceramic magnates must not be used for upper then I would say 1000Hz… (actually is possible but then the drivers should be driver by SS PP electronics… whish is very different subject), Then there are Neodymium magnets, there are Samarium magnets, there are powdered magnets and few other - they all have own sound. The electromagnets are juts one of the different type of magnets with, like anything else, own sound. I did not see anybody trying to talk intelligently about Sound of electromagnets. Usually as soon the “freaks” see electromagnets then these yeas flip upside down and they behave like typical idiots: This is the field-coiled drivers and therefore it is the “best”. I still feel that the best is what sounds better and unlit I hear a properly sounding installation with electromagnets I would refuse to admit that  field-coil has any advantage over permanent magnet. I do not say that it does not have it. I juts say that the the people who advocate the electromagnets did not make their case yet conversably.

After my experimentations with Vitavox S2-fieldcoil I designed the how I need modify the S2 in odder to get from it what I needed in non-compromised manner. I called that driver  “Quartopuss” because it had 4 active polls. I have a pretty clear view of magnetic stricture (reuse the S2’s phase plug and diaphragm) and it would take ~$4000 to make the driver. However, what I heard so far from electromagnets did not convince me to go into the new round of hassles and expenses. The answers about the electromagnets are still pending but unfortunately I do not see any players out there who would cover the electromagnets question with a demanded level of seriousness. I personally have no motivations to build up around the project a necessary for me crew and to dive into the nuts and bolt of electromagnets…. because “so far” my S2 perfectly fulfills my needs.

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