bipole Radian 5208c question

[AudioGeek]

So, i am thinking of using the 5208c not in an OB project but just a bipole. 5208c forward facing obviously. Rear facing on enclosure a 10" or 12" bass driver.

Probably have to have seperate sub enclosures for each.

I am looking for a nice bass driver that will:

1) function to eliminate need for a BSC for 5208c
2) Have a lower frequency response than 5208c for some lower bass.
3) so maybe 40hz-500hz response?

Any ideas? thinking maybe just a 12" Eminence?

Thanks!

Richard

[AudioGeek]

well either that or a regular 2 way with 10 or 12" driver on front.

what my goal is 96db sensitivity down to 40-50hz.

I am unsure how Galante Audio when they were making the Rhapsody claimed 96db? No bsc?