I have One Kicker CVX12 Dual 4 Ohm .
My Amp : MTX X1000D

now I have 60L , Tune 29Hz Box .
but i not have spl or punch me on kick bass ..

But i want to have Punch Bass .
Spl , ...

I have tested this sub on 40L Seald box
but it not punched me .

Is possible Some body Help Me To Calculate Box for this sub ?

Factory Recommended 63L , Tune : 42 Hz

i need Professional Advices