The fi 18 Q working well on sealed box ??

[mtx180 0]

Hi, I new on this forum , my question is : the sub FI serie Q 18 inch working well on sealed box ??? ,, what king of sound the will generated ??

i think order to fi 2 18 fi Serie Q but i have this question ? i made space for 6.5 pie3 for two sub ?? is make posiblee sound better ???