The Akira class is a very popular class of starship amongst my fellow trek fans. It has enjoyed more screen time than most of the other classes I have created MSDs for so far.
When I started researching the Akira class, I found that a group of trekkers has decided that the ship has two warp cores. However what little canon references there are state it was one core. I think what makes some fans think it has two cores are the two hatches on the underside of the saucer section towards the rear. I believe the Star Trek Fact Files eroneously marked them as core ejection hatches.
I decided to follow the canon references of one core.