I would suggest some disclosure and expansion of the hidden issues with some facts here. This thread is starting to read like a crap pocker game.
Firstly,
Motive: Guido is making a play (read marketing play or teaser) for what he sees as a potential market using the 0476 comparisons for Be after market diaphragms.
When I compare this type of smoke and shadows visibility stuff to some of the really excellent home grown cottage audio businesses in the USA that put in their own hard yards it makes me want to hammer down the protruding nail.
The JBL guys have the credibility as does 4313, always have had, always will.
Do JBL have pallets for shipping significant orders Ex Northridge?
This driver has many design features that were pioneered by the designer. Don wrote a good post on it once and it would be useful if it was re posted here.In any case, there is no way to make a 476Be from any of the other JBL cores
Without making a rod for your own back I think that post was a little counter intuitive in that you have your work cut out for yourself re working all those network models for the aftermarket Be diaphragmsThat said, these Be diaphragms are a excellent option for other JBL cores. Plan on reworking any existing passive filters accordingly. Rather than wasting time comparing a 2451 (or any other core) against an "unobtainable" 476Be how about comparing a stock 2451 against a 2451 with a Be diaphragm. That would actually be relevent. Of course, no one can actually hear a driver or a diaphragm on a forum regardless of how many pretty graphs are posted.
Of course they won't be pure JBL drivers anymore.