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I have a set of very old Tang Band 2inch dome midrange, that i had obtained some time back. One measures fine, the other seems off.
Is there a way to fix these? Something i can start off with? what problem does the Impedance curve reveals?
The purple trace looks like a pole plug issue or maybe a faceplate that isn't right.
Yup, looks like one is leaking.
Ok, will try to take apart the purple one and see, if I can see anything