I ve purchased some 2.5 inch extended range buyout drivers for mids and Dayton Neos for the tweeters to build a line array.

I intend to do the following for each channel of a stereo setup

1) Build a vertical line of about 5 feet.
2) Place 16 mid drivers at 3" apart starting from top (leaving the bottom 12 inches for the woofer)
3) Use a 10" sub woofer in the lower part.

What is the maximum frequency that I can cross the sub to the mid?
I have a frequency of 300 Hz in mind considering the size of 2.5 inchers. How high can I go?

Thanks,
Goldy