Originally Posted by Jonnyswboy View Post
My electrical system is 100% stock. I should have enough wire to beef up a few connetions though. And what has more SPL potential?

SA-15, DDX15, or a Fi XV3 15 all given 1000w RMS. I'm guessing the Fi due to higher Xmax?
While I'm certainly no expert, I suppose that would very likely be the case if it were IB or sealed. However, with vented the cone barely moves at Fb (tuning frequency).

Your best bet to determine/compare SPL potential would be to model all three.