A recent thread revived this thought in my mind. I'm using a 210 as part of my center channel speaker, and it's currently loaded with paper surround 515s.
As I was reviewing the literature for the 515 16G, I saw that the bass response of two of these drivers extends father down than I thought, maybe to 35-40 Hz.

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Would switching these drivers into the 210 give me a better sounding set up than the current 515s, or would I be losing something from the midrange? I do have a pair of JBL 4685 subs for low end reinforcement.

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