I know there are alot of variable that go into this but lets just have some guesses.
2 12 inch rockford p2's d4 in prefab ported box
or
2 15 inch crossfire subs, also d4 in prefab sealed box
Both could be wired same ohms, off same amp.
2 12 inch rockford p2's d4 in prefab ported box
or
2 15 inch crossfire subs, also d4 in prefab sealed box
Both could be wired same ohms, off same amp.