livinloudjmy

hey guys im happy to have found a good site with some good people into helping others..... well heres what ive got,
I drive a GMC Jimmy ( basically a blazer )

I am getting two kicker Comp Vr 12's dual 4ohm
I am running a Lanzar Vibrant amp 800watt 2 channel it's ratted at 800 watts bridged at 4ohms, so id say i will get atleast 400rms. I'll be runing the subs in series parralle..
I hear that a ported box will give me 3dbs in most cases.
The specs on the box i plan to build are....
30inches wide, ( due to space issues )
14inches tall,
28inches deep,
it's going to be a single inclosure with a 2x4 brace imbetween the subs,
Subs to the roof, and ports to the rear, im going to have 3-4" aero ports 12inches long, instaled around 4inches from the bottom of the box....
Im told it has around 1.75 and 2.25, and that meets kickers specs for the subs... and there rated at 400rms... Will this do good, cuz im new to this so i dont want to just go out and build a box that some one told me would do good, Please let me know and comment if ya like....


Danny

Livin - Loud

well what u have lsted above is defiantly a start. that box seems to be a good size to start with as well. now put the subs facing upward, and the ports all facing backward. but make sure when the ports are facing backward, there is about 8-12 inches of room between them and your hatch. that allows for thr air flow out the ports to be effective.

you can also try all ports and subs facing upward. that works well in suvs to. give both a try.

are you wanting just an everyday driving system, or you looking to compete SPL wise as well?


Livin Loud

Father Yuli

iTrader: (17)

make your box 28x29x14 common chamber

put subs on the top of the box and have ports shooting out the back. use aero ports that are 4 inches in diameter. i would try 3 ports. this box will give your subs about 2 cft after displacement. make the ports 12 inches in lenght including flares.

your box should look like this, but with 3 ports instead of 4. center the ports in the middle beside each other.


[ December 30, 2004, 01:48 PM: Message edited by: Father Yuli ]

livinloudjmy

Livin , man Im just wanting something better then the next guys kicker comp vr set up you know what i mean, I want some **** when he heres mine he knows i aint playing around.... and i mean yea i'll put it on a scale once or twice, but just for personal knowledge.... Im 17 years old so i think this is fairly advance especialy for what kids run around here it's all prefab and what ever the local shop says is best... Im just looking for some loud car shaking bass,....
Wut will i gain by facin all up instead of ports out the back.....

Also do i need to run 3 of the 4inch or can i get by with the ones i was talkin bout using, what's the pros and cons there?

Thanks for the help thus far guys

livinloudjmy

also, i seen something in one forum about rounding out the corners and **** what does that gain, I mean guys im the average kid All that matters to me is that i may be having a system like 3x's louder, Im not really picky with all the really fine crap that i really cant tell but please explain....wut yall were saying

Father Yuli

iTrader: (17)

use round ports like i said, just like the ones shown in the picture. they are called Aero ports and they have flares. u can order some from www.psp-inc.com there are no cons to using them, only pros. they are flared so the port intakes more air thus making it shoot the air out faster = increased spl. plus its really easy to tune and adjust the plastic port, just cut it with a saw or glue it back together with pvc glue. once u use those u will never go back to a slot port again.

your box should look something like this here, this box was the loudest in my jeep


and this is how u round off the corners in the box. just stick a peice of wood in the corner thats cut on a 45 degree angle and then just use some kind of body fill to completelly round it off and cover it all with some resin.

livinloudjmy

Wuts the diffrence between the smaller ones and those huge one though, Aero ports that is, To me the average joe will i be fine with just putting the ports in glueing them and im good to go... ( how much do the port normaly run ?! money wise )

livinloudjmy

also wut' pros for rounding the edges inside the box, agian would the average guy ME really need this?!

Father Yuli

iTrader: (17)

u wont need to round the box inside

the ports are really not that big, they only look big. the whole is only 4 inches. u asked for box advice so this is what i advise u to do. u dont have to tho but i would if i wanted the loudest bass with the gear u have and the vehicle u drive.

if u go with the aero ports they come in 18 inch lenght. u wont need all of that. cut it down so the whole thing is 12 inches and then u good to go. u dont even need to glue, just tape the flares to the straight pipe and screw the outtter flare to the box.

i think one port assemply runs about $12 from the website i showed u

[ December 30, 2004, 03:43 PM: Message edited by: Father Yuli ]

livinloudjmy

Aigty man so i'll just cut wut size hole for the ports... and all i've gotta do is slide em in and screw like 2 screws and im good to go!

is 4inches from the bottom of the box good.... centeres along the box...

I was trying to make sure i know everyting about what im getting, im sorry i didnt mean to sound like a dick.... So wut u think i may his roughly?!