help with kicker cvr box

[72 chevy van 10+ year member]

Well since no one wants to buy them i'm going to try a new box for them.so what would be a good box for them so they can hit the real low notes i was thinking of building a 4 cubic foot box with a 8'' areo port tuned to about 28hz what do you guys think would work best the box that there in now is 3.5 cubes with a slot port tuned to 37hz these are the 2006 models also i was thinking of tuning the port to the fs of the subs wich is 25hz for a flat response but never done that before any help would be great thanks kyle.

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[RAM_Designs 5,000+ posts]

I'm assuming you have a pair of 12's? If so, CVR's like big boxes tuned low...shoot for something around 5ft^3 tuned in the upper 20's.

 

[RAM_Designs 5,000+ posts]

Hey, I would recommed not listening to a thing I say because I have a vendetta that is probably not in your best interest.

fixt

 

[72 chevy van 10+ year member]

I'm assuming you have a pair of 12's? If so, CVR's like big boxes tuned low...shoot for something around 5ft^3 tuned in the upper 20's.

yes a pair, i would like to use a areo port what size would work best would a 8'' one work.

 

[RAM_Designs 5,000+ posts]

yes a pair, i would like to use a areo port what size would work best would a 8'' one work.

It'd have to be nearly 29" long for a 28hz tune.

 

[72 chevy van 10+ year member]

would this box work the only thing i would do to it is make the port a little longer to go from 30hz to 28 Imageshack - 45cubes30hz60sqin5qi.png

 

[RAM_Designs 5,000+ posts]

But with the longer port you're taking up more box volume, which requires a longer port for the same tuning...it's kind of a slow process trying to lower the tuning by doing that, and it eats up box volume in the process. You'd be better off making the box 1" wider and extending the port 3-4". That way you'll keep roughly the same volume yet make your port longer in order to get the lower tuning.

 

[galacticmonkey 5,000+ posts]

x2 On going big.

Every time Ive built a box for a Comp, CVR, CVX, L5, or L7 that was way oversized, they were always loud.

 

[72 chevy van 10+ year member]

Well i made this box Imageshack - 45cubes30hz60sqin5qi.png i made the port 2'' longer and it sounds really good way better than the old box plays nice and low and and get's WAY louder and even sounds cleaner too. //content.invisioncic.com/y282845/emoticons/happydance.gif.a963168fea27d8453c3ec467ddcf9e1c.gif

 

[SPL Blazer 10+ year member]

If you only need to extend the port a little you can always add another layer to the face of the box, 3/4" at a time. I've seen some SPL guys do this with their slot ported boxes in the past.