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I pulled this from a very old PA speaker box from a University of Miami Library.
I do not know the brand, but it was so old, the paper cone was formed by folding and gluing, with seams.
The new suspension i got on eBay.
It looks a bit asymmetric, but there is no misalignment of any kind.
The pole piece used to be ALL you needed for a magnet.
Not these 15 pound magnets you see now.
100 coolness points for 90's kids if you can identify the song i use for testing.
it used to be a great subwoofer tester back in my day.