box design for my 12's

square design should be good enough as long as the air space is correct. You can put angles on it if you want to be creative or different. Thats all up to you. Build it right and seal it tight.

I have always built to suit the space availible. but some people swear by the "golden ratio"   I have tried it and not been able to tell a diffrence    and never mic'ed one due to it being sealed    but the ratio is as follows    width =1 depth = .618 width length = 1.618 width2009 0-1000 Trunk WR 154.0DB 2009 1001+ Trunk WR

2007 USACI World Champion

2007 World Record

2006 USACI Finals 2nd Place

build it square with the subs aiming directly at the back door..i have a Jeep and i know how to make them loud!!

You dont need 1.25 CuFt for those subs. I should know, I have one in the back of my car right now. The box its in is .89cuft and has no fiberfill or nothing like that in it. This creates a little better response IMO from what Fosgate's box spec's will give you. I decided to go with a smaller box because I blew 2 RFP3412's and my other 3812 in a 1.2 CuFt box because the woofers would over extend themselves and not properly disperse the heat. Anyway, thats my speal about the RFP3812's "Shiny chrome when used in conjunction with bikini models is particularly effective in inducing brain deficit disorder"

02 Jeep Grand Cherokee

Monster System on its way.

Thanks for the input. Its nice to  beable to get different opinions on designs. I will biuld it this weekend. Hopefully I can post some pics when I am Finished.