SPL460D1A Enclosoure-Need Help

[c1performancea]

Hi eveybody

I got these days my brand new SPl Dynamics SPL 460D1A. And i got an 95 Civic Hatch. I think i could only take around 120-140litres for these sub.

Could anyone help me to make an build blueprint?I dont know how i had to build the Port.

I want the tuned frequency between 30-35hz. Maybe a changeable port?

The frequenzy of the car ist around 57hz.

Maybe someone could help me.Thanks a lot