PDA

View Full Version : Box design, need some help on it.



miker
03-18-2008, 07:19 PM
Alright, I drew up a quick sketch to get the point across.

Pretty much need some help with tuning.
Not a great pic, or drawing.. But maybe it will get my idea across.
http://i107.photobucket.com/albums/m304/TheKingCrabAtTheBaitShop/DSCN1103.jpg


So, as you see the port is external. I want the port to travel though the ski hole in my back seat. I have 8.5"x 8.75" to work with. length shouldn't be an issue.

The box is going to be 2.5 cubes. Tuned at 32hz. please..

Do you have it as an open hole? or do you use a smaller port area, and kind of "maze through it to increase length?

BrianChia
03-18-2008, 09:11 PM
It will most likely have to fold at some point to achieve 32 hz tuning with such a small box. When I get some time later I'll plug in some numbers for you and see what I get. How far out from the back of the box can the port extend?

miker
03-18-2008, 10:23 PM
It will most likely have to fold at some point to achieve 32 hz tuning with such a small box. When I get some time later I'll plug in some numbers for you and see what I get. How far out from the back of the box can the port extend?

That wuold be awesome. Thanks..

Ummm, well as far as it has to! the seat will not be able to be occupied anyway, so it can go out to a "reasonable" distance.

iDesignBoxes
03-18-2008, 11:25 PM
2.5" wide, 5.5" high, 10" long = 32.18Hz

miker
03-18-2008, 11:35 PM
That would deffinatly be the easiest thing to do.. It just seems weird.. Almost like having a big hole in the side of you box b/c it has no bends in it..

I thank you very much :) you're very helpful.

BrianChia
03-19-2008, 12:02 AM
2.5" wide, 5.5" high, 10" long = 32.18Hz

Yea it would work if you didn't mind port noise like a mother****er. You need at least double that port area, more would be even better. I would use a 6" aero port, 25-26 inches long.

miker
03-19-2008, 12:07 AM
I'll do the aero port thing, and if that doesn't work well, I'll cut the hole into a square and do a slot port.

Thanks for the help guys.

miker
03-19-2008, 11:18 PM
Does it matter how far the Aero is stuck into the box???

BrianChia
03-19-2008, 11:20 PM
Not really, as long as you account for port displacement.

miker
03-19-2008, 11:23 PM
Not really, as long as you account for port displacement.

Alright.