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I would run a maelstrom in an infinite baffle (no box) and use an external EQ to fix the ridiculous cabin gain you will get.

Don`t bother with ports, they don`t work well in car subs.
 

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Discussion Starter #22
So how do I do infinite baffle in a truck. what do you mean don't use ports how man spl guys win competitions with sealed boxes? Im not doing spl I just want lower bass and I haven't seen anyone with this specific sub in a car application. I appreciate all the help so far. Great website
 

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Don't bother with ports, they don`t work well in car subs
There are millions who would disagree with that.

Infinite baffle would be building a wall in the back and using the whole back of the vehicle as a cabinet. with 1000 watts you'd have much less out put in the 20 to 50 hz range compared to ported.
 

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Discussion Starter #24
i dont plan to wall it off. i guess ill just keep my 12s and redesign the box to go lower. is there a free box design program on here anywhere? if anyone would like to help me out with a design the back of the truck is 49 wide and i can go 25 high and up to 42 deep. thanks. and the subs are jl audio 12 w3v3 8 ohm subs.
 

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Discussion Starter #26
isnt that an awful lot of space for 3 12s 5 cuft each? i need to mess with that box program a little more but is that pretty accurate in predicting out comes.
 

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Here's the WinISD driver file, save it to the Drivers folder in the program. You can model the sub in different box sizes and tunings and find a combination you like.

View attachment JL Audio 12W3v3 8 ohm.wdr

The program does not account for cabin gain which is substantial.
 

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I think you'll see after playing around in that program how much a large enclosure tends to aid in low end extension. I have 1 15" in almost 11 cf to get low.
 
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