Originally Posted by
JeffW
That they are both close to the same is a pretty good indication that they aren't too bad off. I can't say for certain how close JBL was able to hold to the 6.25 +/- 10% spec over the years, you'd need to know what the actual DCR values of these particular coils was when new, I guess.
Seeing as how replacement diaphragms are seemingly no longer available, I'm not sure a tenth of an ohm here and there is the greatest obstacle these drivers will face going into the future.