Hey guys,

Love the forums! A little bit about me, 16 years old, 'restoring' a truck to drive come Nov. when I get my G2 and working on a system.

Ok, give me wood and I can build anything, give me metal and I can weld anything, even give me measurements and I can design anything, HOWEVER, I completely utterly SUCK at coming up with the dimensions of a box. (my really weak point...)(btw... ^all of that was an exageration... LOL)

So I need a little help, even guidence where to start would be awesome.

I have three 8" subs and need to make a ported enclosure for them. I can do 3 seprate enclosures or 1 big one. Which do you think is best?

I want it to hit as hard as possible.

I have about 9" wide x 40" long to work with and it can be as high as it needs to be. I would like to have the subs mounted on the top and 9" should allow them to just fit, if not I may be able to squeeze a few more inches out of it.

Any suggestions on sizes / methods to build it / programs to use?

If someone wants to throw together a design that would be great!

Here are the specs:

Fs 22.8Hz
Re 3.2DVC
Qms 4.21
Qes 0.38
Qts 0.34
Sd cm2 195
Vas 27.1
Xmax 1way 12mm
BL 15.4
SPL 1W/1m 81.2
RMS 175W
Max 250W

Thanks
Zac

P.S. This is my starter system. I may be upgrading to a SPL competition stereo in the near future.

well, what can you fit in the truck, what kind of truck is it. is it a crew cab, regular cab etc
its just kind of hard to give you suggestions when we dont know what your working with

"I have about 9" wide x 40" long to work with and it can be as high as it needs to be. I would like to have the subs mounted on the top and 9" should allow them to just fit, if not I may be able to squeeze a few more inches out of it."

To clarify, its an EXT. cab truck, however I still want to try and keep the back seats so I am thinking a center console. Which would follow the above demensions.

Thanks,
Zac

Put these numbers into winisd, and clearly I dont know how to use it yet, you could try google WINISD its a speaker box design software and its free

Im gonna say they dont look like your gonna get a lot of slam out of them but will give you more than what you got, Build a ported box and tune high for more SPL

BTW what amp are you using, my bad for not reading your whole post before replying last time

Np man.

I have WINSD just have no idea how to use it LOL.

You say they wont be great for SPL, any other box types that may make them better?

Zac

if you need a hand or really want to learn drop me a line ive got some free time for the next 2 week

Zac, i got a design figured out for ya. this should work for your 3 8's. you need to build your box to 2.25cu'. you can use 3 2"inside dim cir ports at 7.75" long or 2 3"inside areoports at 9.3" long.

I would build a slant face box. with the base at 7.5X40
Back at 19.5X40
top at 3.5X40
face at 20X40
sides at 7.5X18 then cut top to 3.5

that will work for a rec cab truck,

i tryed to get as much out of those subs as i could but if you want it to pound, i would try a couple of 10's or a 12"