I've read lots about Ferrite vs. Alnico but not many actual _facts_ except for our fearless leader's excellent report of comments by some of the JBL people themselves.
I know it's bad form to expect real data since it inhibits the expression of opinions but I think I more or less understand this now and I'd like one tiny measurement to confirm it. What is the radial distance between the pole piece and the top plate on a typical JBL woofer? From this I can calculate the reluctance of the circuit and hence the operational point of the ferrite or Alnico.
I asked this before but I assume the lack of response was because I didn't have a catchy title for the post Surely someone must have a dismantled driver ready for a recone?

TIA