Today I called Orange County Speaker regarding the low BL factor after they recharged the 2205/2235s. Grumpy had measured one at 17-18 and JBL spec for an Alnico magnet woofer is 21.
They agreed that the value was low and said they would recharge the magnets at no charge. Wow, even though it had been almost 2 years, they gave me no grief about it.