Box for a RE audio 18"

[Sketchup 10+ year member]

I have been looking at the RE Audio SX18D2 (18" sub @ 2ohm) and have been trying to see if a box for it would fit in my cars trunk. It requires a 5.5ft.^3 box to 8.0ft.^3. In the screenshot below is a box made off of their website in the box calculator software. Would this box work well being 14" tall, after all the mount depth of the sub is 9.5" or 9.75" I can't remember. The height in the trunk is 17" so I figured a 14" would be fine. How would I find out how many hertz the box is, or better yet would someone be able to calculate that for me. I have been looking at many different subs and am still getting ideas, I just want to see if this is possibility that would work.

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[Louisiana_CRX 5,000+ posts]

pic not working

 

[Sketchup 10+ year member]

I think it was 40wX24dX14h and the port 3". Goto re audios website and the box calculator is in the upper right corner. Sry i didnt respond earlier

 

[anubis]

way too small of port area and 20 hz from the pic and RE doesnt account for subwoofer or bracing displacement

 

[Sketchup 10+ year member]

Very good point, that is something that i forgot to consider, I guess it is safe to say that I would not be able to put a 18 in my car