ESS AMT Heil Diaphragm ORIG 1970s MODEL Pair for AMT-1 AMT-3 Rock Monitor read

Description

*Please read carefully and look at pictures*
These are ESS AMT tweeter diaphragms pulled from a pair of original ESS AMT 1a speakers, the very first model, ported version with no passive radiator. I believe it is the very first model of the speaker from 1973 or so.
These are the ORIGINAL DIAPHRAGMS without the veil that ESS put on the new mylar models.
One diaphragm is working properly, the other one also works but has low volume output.
The one that works measures ~5.1 ohms and does not appear to have any issues, visually speaking (see pictures)
The one with low output measures ~2.4 ohms and has an obvious warp in the middle of the pleats (see pictures)
Size: 1.5625" x 5.5625" (40mm x 141mm)
Because of this these diaphragms are sold as described / as-is.