I have the 2421A drivers in my 4430s and am trying to install new OEM D8R2425s into them. The issue is that the holes for the line-up pins in the new diaphragm don't seem to be large enough and as such the diaphragm won't sit down.
I have tried gently pushing down but will not go any further to force it in.
I was under the impression that these were interchangeable. The 2425 doesn't seem to have the line up pins to contend with.
Has anyone else encountered this?
Thanks,
Warren