Alnico or not alnico ....... what is the bisible d

Alnico Drivers from JBL have a bowl shaped closed magnet assembly. Ferrite Drivers typically have a Rubber Dress ring covering the magnet it self with the back more contoured. Go to ebay search JBL woofer and it should be pretty obvious. Some folks state that Alnico drivers sound better than the Ferrite ones

Don't wander too far while wondering :-)

Good Listening

Peter
Peter