Problem desinging a box

[Don Fiesta]

Hello, i have 2 sundown audio SA-12's running on a massive audio n3 (1400wrms).

i bought a new car so i need to make a new enclosure..

i have these dimensions:

Height 34cm

Width: 95cm

Depth: 35cm

now i wanted to tune my port for 31Hz.. i calculated it with torres bud if i want 31 hz i need a port of 5cm and that looks really small to me..

Can u guys help me plz?

grtz Danny

[Joe X]

You dimensions are small for ported, also you don't stat what vehicle you use.

[Don Fiesta]

im driving a vw scirocco..

i just still wonna use a little trunk space..

[Don Fiesta]

on the sundown site they say the recommended box is between 1.5 and 2 ft³.. and 1.5ft³ x 2 = 3ft³ and 3ft³ is 84.951Liter and with my dimensions i have 87Liters (3.0724ft³)..

[PSD POWER007]

Gotta add in woofer and port displacement too.