ok, so im not sure how to input all of this data and use the calculator im sorry, maybe someone here could give me a hand?, the specs on the sub are at http://mobile.jlaudio.com/pdfs/8-12W6_BDS.pdf, its the 12W6 that i ahve

ok guys, i need some help on a tuning frequency.. what would be the best tuning frequency for a 12W6, in a 2.25 cubic foot ported enclousure?, i want the most spl and sq i can get..

why not just use what the jl specs say 2 2.5" ports 13" long? it will be tuned somewhere around 28 hz. your over all spl will br reduces because of the lower tuneing but it should sound great. what are your maximum dimensions to work with?

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im not sure what my maximum dimensions are, but my trunk is pretty damn big, and i dont care if it takes it all up, but it says 2.25 cubic feet and everything, just if i do it to their specs.. will it have good SPL and SQ?

yes it should.

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According to JL, they have 3 options for that driver....

All the external dimensions listed are for 3/4" MDF, and they have allowed for the displacement of the driver, port and a brace.

The "purist" enclosure is 2.75cuft, 20" X 14" X 23.7" with a single 4" port 14.7" long. F3 is 30hz and Fb is 26hz.

The "normal" enclosure is 2cuft, 20" X 14" X 18.2" with a single 4" port 16.8" long. F3 is 35hz and Fb is 29hz.

The "db monster" enclosure is 1.5cuft, 20" X 14" X 14.3" with a single 4" port 19" long. F3 is 41hz and Fb is 32hz.

What does all that mean, you ask??....

The larger box will get "lower", you will hear lower frequencies at a higher volume level than the other boxes. The smaller box will be louder than the other 2, but it will not go as low. This is not an issue for most regular music, but could be a problem if you play bass CD's at high volume that have a lot of sound below the tuning frequency of the box.

I would suggest that you try the "normal" box first, it will still sound a lot better than the bandpass box it was in.

HTH

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BigRedGuy
Still bumpin' after all these years
Kenwood/AudioControl/Orion/JL Audio/Lightning Audio

^ Excellent advice form the BRG. JL is one of the few companies that actually recommends decent enclosures for thier drivers.

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Paul Niwranski
1966 Cadillac Superior Crown Royale Limousine Hearse

If you're mirrors ain't shakin...you got taken...
RIP Member #8
Be careful what you wish for...

Thanks Paul....

One of the things I like about JL is the fact that they offer a variety of enclosure types and sizes for all of their drivers, along with some information about what to expect from each one and why.....

Dontcha wish every company did??...

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BigRedGuy
Still bumpin' after all these years
Kenwood/AudioControl/Orion/JL Audio/Lightning Audio