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View Full Version : someone who will DESIGN a box for free, please read



alwaysontop
03-30-2008, 12:31 AM
ok im getting two new kicker L7 12's pretty soon and i need a ported box designed that will fit in my cobalt.

dimesion restrictions are.
height is the biggest problem it can only be 13.5"
width around 35" and depth around 15-18"
the last box i build the depth was way to big.

as far as the tuning goes. if you can actually design a box then you should know what sounds best for the subs possibly? and if not i just want the suggestion for the subs by kicker but im praying that someone will just come up with a box that they knows sounds great for the subs.

and if you need anymore info from me to do this let me know.

king ranch
03-30-2008, 12:37 AM
well before any displacement you are only looking at around 3.8cuft so i dont think the box would be gid enough to go ported espcially after displacement those subs wouldnt have much air you are gonna need about 5cuft net

alwaysontop
03-30-2008, 01:30 AM
thats why i said someone who knows what they are talking about design me a box. there are perfect boxes on ebay that would probably fit in my car and i know they sound good cause my buddy has one. thats why im trying to find someone who knows what they are talking about to design me one

SeanDub
03-30-2008, 01:35 AM
well before any displacement you are only looking at around 3.8cuft so i dont think the box would be gid enough to go ported espcially after displacement those subs wouldnt have much air you are gonna need about 5cuft net

Well I don't know what kind of math you do, but your 3.8 is wrong.

13.5" x 18" x 35" = 4.92 cubic feet gross
13.5" x 15" x 35" = 4.10 cubic feet gross

However, both of those numbers are too small to properly run 2 12" L7s ported. After wood displacement, sub displacement, and port displacement, there will barely be any air left for the woofers, probably only around 1 cubic foot a piece.

Therefore you're going to want to either do 2 10s ported, or 2 12s sealed. If you're going to go sealed, I would look into a different sub than an L7.

maldecido33
03-30-2008, 01:38 AM
Well I don't know what kind of math you do, but your 3.8 is wrong.

13.5" x 18" x 35" = 4.92 cubic feet gross
13.5" x 15" x 35" = 4.10 cubic feet gross

However, both of those numbers are too small to properly run 2 12" L7s ported. After wood displacement, sub displacement, and port displacement, there will barely be any air left for the woofers, probably only around 1 cubic foot a piece.

Therefore you're going to want to either do 2 10s ported, or 2 12s sealed. If you're going to go sealed, I would look into a different sub than an L7.

What type of math do you do?

You did external dimensions...

12" x 16.5" x 33.5" = 3.83 cubic feet gross
12" x 13.5" x 33.5" = 3.14 cubic feet gross

alwaysontop
03-30-2008, 01:41 AM
this cat just slapped you in the face hahaha

alwaysontop
03-30-2008, 01:43 AM
the box i have built now takes up my entire trunk its like 28 in depth and 36 in width. i have the room. i just dont know what im talking about. a ported box for two kicker l7 12's CAN fit in my cobalt and sound good.

maldecido33
03-30-2008, 01:43 AM
To the OP, there is no possible way to design a feasible box for your situation. It is impossible.

I'd look at getting different subs, as that is really your only viable option.

SeanDub
03-30-2008, 01:45 AM
Well I don't know what kind of math you do, but your 3.8 is wrong.

13.5" x 18" x 35" = 4.92 cubic feet gross
13.5" x 15" x 35" = 4.10 cubic feet gross

However, both of those numbers are too small to properly run 2 12" L7s ported. After wood displacement, sub displacement, and port displacement, there will barely be any air left for the woofers, probably only around 1 cubic foot a piece.

Therefore you're going to want to either do 2 10s ported, or 2 12s sealed. If you're going to go sealed, I would look into a different sub than an L7.


What type of math do you do?

You did external dimensions...

12" x 16.5" x 33.5" = 3.83 cubic feet gross
12" x 13.5" x 33.5" = 3.14 cubic feet gross

Yeah I did external dimensions. He clearly doesn't have enough based on the external dimensions, much less the internal dimensions. In my explanation, I said he would still have to account for wood, sub, and port displacement, hence I gave him external dimensions. Your calculations are net air displacement, without accounting for sub and port displacement, not gross calculations. Mine are gross space calculations. However, your math is perfectly fine.


this cat just slapped you in the face hahaha


You're the ******* idiot who can't even figure out how much airspace he has in his trunk based on his own dimensions. You're the ******* idiot who wants to do 2 12s ported in a space that is way too small. And you're the ******* idiot who doesn't seem to understand based on the above posts that it isn't going to work. But thanks for trying to call me an idiot.

btdickey99
03-30-2008, 01:46 AM
to the OP....how much power do you have for the 2 L7s?

Ferendon
03-30-2008, 01:47 AM
Why the hell do you need 2 of those subs in a **** Cobalt?

btdickey99
03-30-2008, 01:48 AM
You're the ******* idiot who can't even figure out how much airspace he has in his trunk based on his own dimensions. You're the ******* idiot who wants to do 2 12s ported in a space that is way too small. And you're the ******* idiot who doesn't seem to understand based on the above posts that it isn't going to work. But thanks for trying to call me an idiot.

lol this guy rocks^^^^

o yea to the OP....I think you just got slapped in the face

iDesignBoxes
03-30-2008, 01:51 AM
lol this guy rocks^^^^

o yea to the OP....I think you just got slapped in the face

LOL

dbhittin
03-30-2008, 01:52 AM
lol at noobs

king ranch
03-30-2008, 01:56 AM
Well I don't know what kind of math you do, but your 3.8 is wrong.

13.5" x 18" x 35" = 4.92 cubic feet gross
13.5" x 15" x 35" = 4.10 cubic feet gross

However, both of those numbers are too small to properly run 2 12" L7s ported. After wood displacement, sub displacement, and port displacement, there will barely be any air left for the woofers, probably only around 1 cubic foot a piece.

Therefore you're going to want to either do 2 10s ported, or 2 12s sealed. If you're going to go sealed, I would look into a different sub than an L7.

and the math i was doing was internal external does no good for figuring out airspace

fasfocus00
03-30-2008, 01:57 AM
amazing, this guy is looking to help on the design of a box and everyone is trying to explain why his woofers are not the best suit for his application and yet he say "no".

if you know it can work than why the hell are you asking for advice???? you obviously know more than anyone in this forum.

maldecido33
03-30-2008, 02:00 AM
If he keeps his max depth at 28", he would be able to have around 4.5 cubes net tuned to 35Hz with 70 sq in of port; far from ideal, but it'd work.

btdickey99
03-30-2008, 02:01 AM
he's an assclown.....I will be nice and give what I think his best advice is being.....that I think he should settle for just 1 12 L7, with a proper sized/ built ported box @ 2.5-3 cu ft tuned @ 35....
and pump it with some powa!

97gp
03-30-2008, 02:04 AM
he's an assclown.....I will be nice and give what I think his best advice is being.....that I think he should settle for just 1 12 L7, with a proper sized/ built ported box @ 2.5-3 cu ft tuned @ 35....
and pump it with some powa!

Yeah i say go with 1 L7, also where in ohio are you located.

alwaysontop
03-30-2008, 02:09 AM
no, i didnt really get slapped in the face at all. because first off i didnt call this kid an idiot. i wasnt slapping him in the face. he just decided to get a little heated there are many people on this site who would answer my questions without mocking my ignorance to building boxes or knowing how to design one. i didnt ask for his lame *** opion on me. and if he was so god **** smart he would of told me in the first post he made that it wasnt going to work.

maldecido33
03-30-2008, 02:11 AM
How much power do you have on tap for both subs?

Reson8
03-30-2008, 02:11 AM
You're wanting someone to design you a box for...free? With that attitude? Good luck....

SeanDub
03-30-2008, 02:12 AM
Well I don't know what kind of math you do, but your 3.8 is wrong.

13.5" x 18" x 35" = 4.92 cubic feet gross
13.5" x 15" x 35" = 4.10 cubic feet gross

However, both of those numbers are too small to properly run 2 12" L7s ported. After wood displacement, sub displacement, and port displacement, there will barely be any air left for the woofers, probably only around 1 cubic foot a piece.

Therefore you're going to want to either do 2 10s ported, or 2 12s sealed. If you're going to go sealed, I would look into a different sub than an L7.


no, i didnt really get slapped in the face at all. because first off i didnt call this kid an idiot. i wasnt slapping him in the face. he just decided to get a little heated there are many people on this site who would answer my questions without mocking my ignorance to building boxes or knowing how to design one. i didnt ask for his lame *** opion on me. and if he was so god **** smart he would of told me in the first post he made that it wasnt going to work.

I DID!

alwaysontop
03-30-2008, 02:13 AM
how was i getting an attitude at all. i didnt say one thing to you, i said it to the guy who called me an idiot twenty times because i didnt know as much as him and i live in youngstown OH

alwaysontop
03-30-2008, 02:15 AM
but since obviously it wont work. i have the money to buy a single 12 so i was thinking about going with an RE audio SX or MX or a FI Q but i dont know which are better. and i want to run a brutus 1600 watt hifonics amp but right now i have a 2 channel 1500 watt MTX amp

Reson8
03-30-2008, 02:17 AM
Well, what kind of budget are we looking at, and is used an option?

alwaysontop
03-30-2008, 02:24 AM
im looking around 300 for a sub because the FI's are 250 and the only way i would probably buy a used subwoofer is if i wanted the sub and didnt have the cash to buy it new or if i knew the person and knew all the things theyve done to it cause ive seen people treat things like **** and its risky with a subwoofer.

skitzafit
03-30-2008, 02:48 AM
I don't think Ionsql on here designs boxes anymore, but could try him and if I remember right its only 10.00 he also includes a cut sheet of the box. well worth the 10.00 he charges imo.
If he dont do it anymore you can always try Chad Hicks lilmanic i belive is his name here

iDesignBoxes
03-30-2008, 03:38 AM
I only charge $5 and include a cutsheet along with a detailed SketchUp model.

skitzafit
03-30-2008, 03:50 AM
http://i143.photobucket.com/albums/r155/IA201/boxplans3.jpg
http://i143.photobucket.com/albums/r155/IA201/boxplans2.jpg
http://i143.photobucket.com/albums/r155/IA201/boxplans1.jpg
http://i143.photobucket.com/albums/r155/IA201/boxplans4cutsheet.jpg
I paid 10.00 for this. he also gave me plans for one with a double baffle

alwaysontop
03-30-2008, 02:16 PM
I don't think Ionsql on here designs boxes anymore, but could try him and if I remember right its only 10.00 he also includes a cut sheet of the box. well worth the 10.00 he charges imo.
If he dont do it anymore you can always try Chad Hicks lilmanic i belive is his name here


Well thats actually the box im going to need because im getting one fi 12. skitzafit what did you get with your fi sub, or did you just get it without any add ons

BrianChia
03-30-2008, 03:33 PM
http://i143.photobucket.com/albums/r155/IA201/boxplans4cutsheet.jpg
I paid 10.00 for this. he also gave me plans for one with a double baffle

Interesting cutting layout.

80INCHES
03-30-2008, 03:37 PM
o yea to the OP....I think you just got slapped in the face


classic

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