Originally Posted by
Mr. Widget
Having done a few myself and taking factory tours at JBL (pre departure from Northridge) and at Meyer Sound, it is obvious that properly installing a diaphragm is not trivial. I doubt 80-90% of the drivers that have been serviced by someone not at the factory ever gets the originally specified performance.
If your diaphragms are sound they should be MUCH closer that yours currently are. That said, even with a pair of perfect diaphragms, without shimming and accurately measuring and comparing with a known target there is no way to get theses precision devices set up correctly.
Widget