4th order help(stuck for weeks)

[Derek Jay Buchanan]

https://scontent-atl3-1.xx.fbcdn.net/v/t1.0-9/13322194_1044872515596851_1106270700946616662_n.jpg?oh=6a5a640a7b1675fa1cddeb15a29cdb4d&oe=57EC3928

I am wanting to build something like this but can not find any info.

Size - Does not matter (2 seater Mountaineer gutted)

I have

(6) 8" mid bass

(2) 6" 3 way component

(2) 5.25 3 way component

AND 1 hybrid 15" Sundown Audio ZV3 Soft materials using DB Platinum Series 15 hardware

I will be running 2000 watts rms

[Joe X]

You need to measure t/s parameters for the custom sub in order see if it will work in a 4th bandpass and to design a box for it, anyways, on the pic, that sub firing directly at the port in some cases can cause issues, you may want to get feedback for your box elsewhere.