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Planar Speaker Asylum Welcome! Need support, you got it. Or share your ideas and experiences. |
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In Reply to: RE: "If we replaced the wire with foil that had 1/4th the mass and 4X the resistance per inch" ... posted by tom_gootee on June 30, 2011 at 18:42:42:
Cool, thanks, some figures at last! The only question is, does the 12 use the same foil Magnepan is offering us? Once we have that, we can figure out what kind of series/parallel arrangement we need to get the resistance right with the new foil.
Wendell also wrote to say that while 1 mil foil would sound great on the woofer, it would be too inefficient, and that he's guessing that 2 - 2.5 mil foil would be right for the woofer. I counted 22 (doubled, he reminds me) wire runs on my MMG and 8 foil traces. So I get 2.75 times the thickness of the tweeter to keep the resistance/unit length and mass changes proportional. If we used .5 mil foil on the tweeter, that would come out to a single 1.5 mil trace on the woofer. But since there may be other factors that I'm missing, I'd say Wendell's guess is a better starting point.
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Follow Ups
- RE: "If we replaced the wire with foil that had 1/4th the mass and 4X the resistance per inch" ... - josh358 07/1/1109:49:12 07/1/11 (2)
- RE: "If we replaced the wire with foil that had 1/4th the mass and 4X the resistance per inch" ... - tom_gootee 13:51:32 07/2/11 (1)
- RE: "If we replaced the wire with foil that had 1/4th the mass and 4X the resistance per inch" ... - josh358 06:52:04 07/3/11 (0)
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