ok well im just wondering how big/small i should make a enclosure for two jl 12'' W3v3's im not sure what car its gunna go into at the moment but does it matter what kind of car its going into when you design a box for just 2 12''s? btw they'll be in a sealed box, and powered by a jbl GTO1201.1 II.

 

have you tried looking in the manual yet? or how about the jl website.

 

yup ive looked in there website. so should i just make and enclousure with the dimensions they give for one box, and do that for both subs then glue them together or something?

 

it also says F3(Hz) Fc(Hz) Qtc what do those mean? are they part of the tuning? because i always thought that tuning was for ports, and btw i am new to this whol audio concept so please bear with me

 

those are what you call t/s parameters. from them you can derive what type/size/tuning of box you sub is best suited for.

you may want to try dloading a free program called winisd.

 

thanks man, i think i already have downloaded it, im justhaving troubles deciding sizes, cuz right now i have no car.

 

personally i would go with what size box jl suggests. if you need a design pm me

 

mmk well thanks for the help. appreciate it, just have one tiny more question, how big should the hole in the box be for the driver? larger than 12 inches or smaller? the site gave me two different measurements, mounting hole diameter 11.0625in and bolt hole circle 11.7 in, im just unsure wich one to use or am i even looking at the right numbers?

 

ok one more question, is Vas the recommended enclosure volume, or is it the volume recommended in the box dimentions part of the site?
and the Vas is 2.844 cu ft

Box dimentions
http://mobile.jlaudio.com/products_s...p?series_id=25

 

the vas is a t/s parameter. vas alone does not tell you how big to make your box.

the sealed recomended bos size is 1.25 cf per sub and the ported is 1.75cf @ 30hz per sub. if you have the room i would suggest porting them,they should sound great.