Not sure who is around anymore with experience fixing those.
You could try contacting Dale Harder. He may be able to provide insight.
Ohm would provide very good sounding upgrades for the Fs but not repair for the original design which is different.
I have Ohm F5 series 3 model which is latest drivers from around 2008 on Ohm F cabinets that I bought from Ohm. That was series 3. Current drivers are further refined next series, the latest 5000 drivers. I can post pics if interested.
You could try contacting Dale Harder. He may be able to provide insight.
Ohm would provide very good sounding upgrades for the Fs but not repair for the original design which is different.
I have Ohm F5 series 3 model which is latest drivers from around 2008 on Ohm F cabinets that I bought from Ohm. That was series 3. Current drivers are further refined next series, the latest 5000 drivers. I can post pics if interested.