AceAnderson
Member
Hi guys, I'm designing a box for a someone who'll be competing with it at State finals, so I'm really trying to get this right. I've been out of the car audio world for about a year now, so I need some refreshers. I'm designing a box for two FI SP4 18s at maximum allowed volume, 32ish hz. It's going in a Chevy Blazer, and the back seats will have to be folded down to make it fit.
I've came to the conclusion that we really can't do a center port, or even dual side ports because of space limitations (36" wide, 2 18" subs = 0"), so I'm opting to put the subs on top (he wants to invert to show off the basket work he did), and using a regular slot port on the side. Here's the model so far with the specs, let me know if I'm overlooking anything wrong
![](/proxy.php?image=https%3A%2F%2Fs32.postimg.org%2Fbuxzmj37l%2FFI_SP4_18_Build_Stats.png&hash=3d7559cdf4ba573693aaee7648979340)
![](/proxy.php?image=https%3A%2F%2Fs32.postimg.org%2F7zuljyk1t%2FFI_SP4_18_Build.png&hash=f79ee8f60c83372f46928b1018820f8c)
I've came to the conclusion that we really can't do a center port, or even dual side ports because of space limitations (36" wide, 2 18" subs = 0"), so I'm opting to put the subs on top (he wants to invert to show off the basket work he did), and using a regular slot port on the side. Here's the model so far with the specs, let me know if I'm overlooking anything wrong
![](/proxy.php?image=https%3A%2F%2Fs32.postimg.org%2Fbuxzmj37l%2FFI_SP4_18_Build_Stats.png&hash=3d7559cdf4ba573693aaee7648979340)
![](/proxy.php?image=https%3A%2F%2Fs32.postimg.org%2F7zuljyk1t%2FFI_SP4_18_Build.png&hash=f79ee8f60c83372f46928b1018820f8c)