As much as anything, I'm intrigued by the usage of the 1200Fe.
then you offered up your speculation on the crossover points & it then made sense
He would have liked a 4-inch coil in the twelve...
As it is they play very well without the subs. When switched on the subs start rolling off around 70 Hz and the twelves start rolling off around 90 Hz to create the proper acoustic crossover around 80 Hz.
Can you imagine how much that would be retail????
I'd have to add it all up and I'm too lazy.