I'm not sure what the consequences of posting these will be...
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"Hey - didja notice that 4345 specs the 2421B? Ha! Reminds of a long ago posting exchange..."
No, not particularly. All these 1" throat CD monitors, including the 4430/4435, were available for a time with the 2421. It was considered by many to be the preferred driver.
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"AND, that 4313B specs the "Midrange chamber"!! Timing, couldn't be more perfect for knowing that - luckily, the router is idle, waiting on that very decision..."
I posted with respect to that in another thread.