need help with a box design

[robwoods]

I have 2 15'' t1d415 Rockford fosgate power series subwoofers , I have a 2004 ford explorer , my outside measurements for the box h = 22'' up to 25'' , w = 45'' , d = can be up to 30'' I've been trying to build my own box for awhile now and I been using win isd program but cant seem to figure out how to tune box to 34 hz when I put everything in it keeps me around mid 40's so if some one could help me out I would greatly appreciate it and if you could give me a diagram and cut sheet that would be awesome and if u could can u make box with slot port between the speakers and thanks again from a fellow basehead

[robwoods]

if someone could help me I would really appreciate it

[ImaNoob]

Dude dont get you panties in a bunch...just have some patience im sure someone will get to you

[robwoods]

im waiting patiently just excited to start build and hear them 15's thanks for the advice

[Joe X]

Here is a suggestion, power: to sub(s) rated, amp subsonic filter to 28Hz, minimum port clearance 6", figure is just an assembly guide:

[robwoods]

thank you joe x for helping me I really appreciate it cant wait to start building it should I put supports in box and if I do will it change anything because I don't want to mess anything up

[Joe X]

The port do the bracing in this box layout so you may do some bracing but not strictly necessary, the 45s you see are done as follows if you want to do them:

Any questions let me know.

[robwoods]

thanks again joe x your advise is greatly appreciated