Help me design a box

[vladd 26]

Ok so I am going to be going to sevierville tomorrow and stopping by the place my brother in law works. He said I was more than welcome to use the equipment they have. --read cabinet shop--

Sooo I figure why not go ahead and make a better box for the one avalanche. I'm looking for 3.5-4 cubes, tuned to 21hz. I would like it to be 30"W X 16-18" H X whatever deep. 16" high is better than 18 cause it'd be easier to fit, but i could do 18 if it really helps that much.

I guess i will do slot ports so i can actually get a working box quickly. I will probably be using 3/4" MDF. I'm thinking a port on each side with the woofer in the middle. BTW its a 15" sub and the displacement is like .1 cubes

I know some people on here are extremely good with CAD, i'm not. I am going to head out now and measure the car once more, i'll update if any measurements change.

i think 30x16x16 would yield the best gross volume

Edited December 26, 2005 by vladd

[vladd 26]

since everyone seems to be busy with x-mas i'll reply to my own post :-)

I'm getting strep throat so i might not stay in Tenn long enough to make a box, just give plans to the bro in law.

here's what i'm thinking. 31 x 16 x 16 and a slot port of 2 x 14.5 x 30.16(deep)

.47 cubes taken up by the port. and .1 for the driver leaves me right at 4cubes.

Now my question is, when figuring out tuning, do i use gross or net volume? i used gross, going to be difficult to use net since it changes with tuning

[Eldorado 0]

You use net volume.

[///M5 2,833]

since everyone seems to be busy with x-mas i'll reply to my own post :-) 

I'm getting strep throat so i might not stay in Tenn long enough to make a box, just give plans to the bro in law.

here's what i'm thinking.  31 x 16 x 16 and a slot port of 2 x 14.5 x 30.16(deep)

.47 cubes taken up by the port.  and .1 for the driver leaves me right at 4cubes.

Now my question is, when figuring out tuning, do i use gross or net volume? i used gross, going to be difficult to use net since it changes with tuning

NET: It is fun, because it changes

[vladd 26]

i fudged the box, a LOT so i'll be designing a new one..actually already have, sub firing up at a 45 degree angle ported and 3.488 internal volume after all displacements.

I'll be making it in a couple of days if i can get the MDF and get dwayne to let me back into the cabinet shop, maybe i can even con the guy that works there into doing it for me, since he's fast as hell (he does it for a living)

Edited December 31, 2005 by vladd

[vladd 26]

OK SOooooo

here's where i am, 6:30 am and still kinda sick... trying to design a box, thought i had one but realized the basket on the avas are huge and won't be able to be mounted at a 45 degree angle without something raising it.

So does anyone out there know a good way to figure out what my options are for mounting this thing at an angle?

obviously how far it is mounted up on the board will matter, i can't use a 45degree angle and a 16.5" face mounting it balanced.

How can i actually calculate the distances here? There's so many variables my head is spinning....or thats the codeine in my syrup :-P