Hi Experts :-)
I have a 1984 MBZ diesel and after about 10 years the speakers went belly up.
I didn't bother about the situation for a few years and then installed two new Jensen Hi-Fi speakers. They had a very good sound quality but it began to fade after a few years. I ignored them and eventually I opened them up and discovered something interesting. The diaphragm is divided into 3 annuli (annuluses, if you prefer). The two inner ones were in perfect shape and the outer one had totally disintegrated.
Now, I am an avid DIY guy and would like to know if anyone ever replaced the outer annulus and, if so, what fabric and glues were used. The width of the annulus is about 12-15 mm or about 1/2".
TIA