Hi Dave,
the conversation is interesting at least, sorry for interfering in your thread.
Do you have a Radian driver? Do they published their curve for the level output, 'cause I think I didn't see one. (I have a powerful phenolic driver, 108dBs, to go after a paper 5" mid at 3k800Hz). I only tested the driver and I think that they will make a great pair for high frequencies. Regards