New Box for RE XXX 12s

[FiNaLaLmAsY]

hey all, alright ill try to make this short. but i own two RE XXX12s 2008 models. using the RE Box calc from greg at RE i have a box ive been using for months that plays loud on lows from 30-37hz thats this..

im trying to learn this thing with port lengths and port area to achieve certain frequency's..

i wanna do another box but i wanna be able to drop down to about 25hz and play in the 50hz range too because my roll off seems to be about 43hz and then the speakers dont like anything after that..

i can go only sightly bigger on the box its a trunk build in a 02 nissan sentra

36wide

15.5tall

21-maybe 22deep thats it..

im running a crescendo audio [email protected] with this setup.

any advice im willing to learn.

a guy i know currently wants me try a setup with aero ports thats 2.2cu after displacement looks like this

(2) RE XXX 12"s

Tuning Freq: 25hz

Compression Chamber: 2.23cuft Per Side

Resp: 20hz. - 55hz. (Option of Poly-Fil)

this box is

36wide

15.5tall

20deep

should i do this box? would it actually sound as amazing as it looks he builds his box with a flat range response frequency and the XXXs have a roll off at about 60hz and he runs them from 20-55hz in the box design..

thanks!!