using the narrow side......

I've searched through the topics on speaker enclosure ratios and stuff.. but was unable to get any info on using the narrow side..

Im currently in the process building 2 enclosures for 2 12"'s i got..

3 cu. ft.

At first, i was gonna go ahead with the golden ratio.... but read some other threads about using the golden ratio..so i scrapped that idea cause im only putting in a 12".. and decided to go with

a modified ratio of 24.5 x 19 x 14.5 enclosure..

im using the 14.5 side as the front...

my question:

is 14.5 (13" internal) too narrow for a 12" woofer.