Hi there
I am starting out to build a pair of 4343 speakers.
My thoughts are, that wether or not to build the 4343B or the 4343A, depends on what kind of 10" I source(2121A or 2121H - I would prefer Ferrit magnets as I do not have remag capabilities on hand).

I am of course aiming towards sourcing the following:
2405
2121
2231

2420 + horn + lens (I have these already)

And then build the 3143 network (Or the Charged coupled network, before I can source the original).

I would very much like the speakers to look and sound as the 4343 speaker, as they were built "back then" - not doing something different that makes them something else.

Just to be clear, (Because I have possibility to buy both 2122H and 2235H speakers) How different are these, in terms of the final product?
Would you, knowledgeable people here, consider that to be wrong, or are they compatible replacements for the 2121 and 2231 drivers.

It could be a point of "getting going" in the project, to buy 2122h and 2235H for now, build the speaker and then keep watch for 2121 and 2231 drivers along the way. But not if they are sonically "wrong".