Sub too big for enclosure?

[ThunderOne 10+ year member]

I plan on getting two JL 12W1v2-4s in my truck. The box I can get from SuperCrewSounds.com says that it has 1 cubic foot of space per sub enclosure. I was going to put two 10s in there, but after looking into it, it seemed that a 10 might be too small. I decided to start looking at 12s.

12s seem to 'work' better in a sealed enclosure that is 1 cu ft.

The JL Audio website says that the optimum enclosure size for the 12W1 is 1.25 cu ft.

Now, is it really necessary to consider fiberfill, or is the fitment close enough? I know some subs have a "range" of fitment, so I figured the JLs would work if there was a hypothetical "range", however JL only says "this size is optimal".

If I were to use fiberfill, how would this affect the output of the subs? I heard it makes the bass deeper and better at acheiving good lows. How much should I add if I were to achieve some sort of improvement? Do I just stuff it into the box, or am I supposed to put it in the box in some sort of special manner?

Thanks all for the tips. I am a noob, still trying to learn.

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[ThunderOne 10+ year member]

Bueller? No one can tell me if this box is too small for the sub? Or if I should even worry?

 

[TheUnderFighter 10+ year member]

I'd be more concerned about putting the sub in too small of an enclosure rather than too big of an enclosure. I wouldn't do that. I'd look into some 10's. I know Dayton has a few lines of subs that would be a much better value and perform better in that small enclosure size.

Here's some Dayton 12's that I think would be perfect: http://www.parts-express.com/pe/showdetl.cfm?Partnumber=295-466

 

[ThunderOne 10+ year member]

I just bought a 500 watt mono amp, the JLs will perform fine in them. They are a "shallow" type sub, I just want to make sure it will be okay in it. I have seen 12" subs with a sealed enclosure range of .75-1.50", so I figured the "range" of the JL's would at least have a minimum somewhere below the 1 foot mark. I just want to see if anyone has experience with such a scenario.

Keep in mind, I am in an extended cab Tacoma. The cab is not very large at all, so I don't need ridiculous bass. I feel as though the JL's will fit the bill. At $100 a pop it seems reasonable. I just want to make sure they will be happy in the enclosure, or if I should consider polyfill.

 

[TheUnderFighter 10+ year member]

I just don't think that's enough airspace for them, especially with the lower power, and after displacement. That's why I said the Daytons would be a better fit, and they'd work just fine on 500w. But if you end up going with those JLs, I'd definitely recommend poly-fill

 

[Flex68 10+ year member]

Yeah, polyfill can make the enclosure appear larger to the sub than it really is, but seems like I recall you can only expect a max gain of about 30%.

If this is true , and the JL's need 1.25cubes after displacement of 0.035cubes, then you'd be looking at being able to go as low as about 0.90cubes with use of the polyfill.

Depending on how much power you're going to be feeding them, yeah, u may be pushing the lower limit with ur 1cube box....but I'd prolly feel okay with trying it

 

[ThunderOne 10+ year member]

The subs will have 250 watts max going to each. I was told I should put a pound of poly fill in per box. This is what the maker of the box told me.

 

[quackhead 10+ year member]

I just bought a 500 watt mono amp, the JLs will perform fine in them. They are a "shallow" type sub, I just want to make sure it will be okay in it. I have seen 12" subs with a sealed enclosure range of .75-1.50", so I figured the "range" of the JL's would at least have a minimum somewhere below the 1 foot mark. I just want to see if anyone has experience with such a scenario.
Keep in mind, I am in an extended cab Tacoma. The cab is not very large at all, so I don't need ridiculous bass. I feel as though the JL's will fit the bill. At $100 a pop it seems reasonable. I just want to make sure they will be happy in the enclosure, or if I should consider polyfill.

...you said it, not me...lol

 

[ThunderOne 10+ year member]

I'm a noob here, what's the joke?