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Re: 6500 anomaly
Can you do an overlay of the two impedance curves (maybe you can't because vertical scaling is different)? Zmin is similar although occurring at a lower freq.. Zmax is quite a bit higher and at …1 · -
Re: 6500 anomaly
The aluminum plate was worse than the plywood. Not surprising. Aluminum is a paramagnetic material and plywood is totally nonmagnetic. https://www.nde-ed.org/Physics/Magnetism/MagneticMatls.xhtml &qu…1 · -
Re: 6500 anomaly
This link explains a bit more: http://diy-audio.narod.ru/litr/Le.pdf2 · -
Re: Phase Plug design for MW65xx
Very cool. The same thing happens if you drop a magnet down a copper pipe (or aluminum).2 · -
Re: 6500 anomaly
Morning research verifying that Le is very nonlinear and varies with both frequency (I didn't know how much!) and displacement (I did know) of voice coil. Shorting rings are to deal with variati…3 ·
