Planar Speaker Asylum

the magnet formula has evolved

68.1.131.10

In Reply to: RE: Low level listening with big Magnepans posted by Kirk57 on November 05, 2009 at 14:23:20

According to the 1980 patent, Plastiform (rubber bonded barium ferrite), ceramic magnet with barium ferrite, and samarium cobalt in a polymer binding were used in different arrangements to increase the net flux density. This was a departure from the earlier pole piece (pure Plastiform) design and, I'm sure, an improvement.

I haven't read all of the patent data, but it seems likely that progress in this regard has continued. Flux density was certainly on Jim's radar screen.

"Jazz is not dead - it just smells funny" FZ

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