I believe the through hole is supposed to be 14", but my measurements should it closer to 13.875"
And welcome to AC!
Thanks Danny.........received the driver here in Zephyrhills 3 days after calling you....it is a thing of beauty, and definitely deal of the year.
I will do some test holes in the next week or so and post my results. I like the driver to fit tight, about 1/16" larger than the driver frame.
EDIT: I did a test hole at 13-13/16", fit good. The driver frame is probably 13-3/4".