Kappa Perfect 12s, minimum airspace?

[Mugen 10+ year member]

Yea, I order two Infinity Kappa Perfect 12s (crutchfield had buy one get one free) and I can eithe cram two in my truck with around .8 cubic ft airspace a piece, or just use one with over 1cu ft of airspace. The spec sheet says to use 1 cu ft, so I was just wondering if I'd be better off having 2 12"s with less than adequate airspace or 1 12" that would have plenty? Also, giving it a little more than 1 cu ft (say 1.3?) would probably allow for a little deeper notes, right?

What would you guys do?

EDIT:

And this box will be custom built, so I can build it as I please, and all my calculations (double checked) are showing .85cu ft per sub. That's including taking off an inch and a half because of the 3/4" thick MDF on all sides, so it's pretty accurate I think. The actual dimensions I can work with is 19.5" tall x 31" long 5" depth at top and 9" depth at bottom.

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[johnson 10+ year member]

Stick some polyfill in there.

 

[Mugen 10+ year member]

Where can I get that/how much does it cost/how much to use?

 

[BukvaMan 10+ year member]

its the stuffing from a pillow //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif. very cheap but really helps and in my case the subs sound even tighter and more deep sounding

 

[Curel 10+ year member]

buy one get 1 free - what a great deal. Btw, perfects do not like small boxes.

 

[Mugen 10+ year member]

//content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gif

Um, thanks for the help I guess...

 

[Hintzyboy 5,000+ posts]

why cant you go more than 31 inches wide?

Just move your jack stuff and go the full width of the cab. should give you enough room to give adequate airspace for both subs

 

[Mugen 10+ year member]

why cant you go more than 31 inches wide?
Just move your jack stuff and go the full width of the cab. should give you enough room to give adequate airspace for both subs

Look at the date of the first post //content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif

And yes, that is with my jack and stuff out, the problem is that my rear mids like, stick out. Doesn't matter though, I'm gonna be getting a new car soon (December hopefully) with either 2 AA Assassin 12"s or 1 15" Fi Q //content.invisioncic.com/y282845/emoticons/up2something.gif.dd110ecf3ae4b76050d87598f2f8de7c.gif

 

[Rich B 5,000+ posts]

Its a shame you didnt get the 10's instead of the 12's because two of those would be a perfect fit in a sealed box of the size you mentioned.

 

[Mugen 10+ year member]

Maybe, but I'm happy with these AA Assassin 8"s for now. Besides, I wasn't really accounting for the subs to have breathing room in front of my seats, that size would've had them like pushing on the seat when they excurted (is that even a word?). Meh, what's done is done //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif