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View Full Version : ANOTHER idiot (me) with box question

UCbizerkeley
03-25-2009, 07:52 PM
Ok, my brain is turning to mush today after my keys got stolen that had house, car, mail, etc I can't focus on anything, so hopefully if someone has the free time they could help me figure this sh*t out -

I need to know how to calculate, well, all of this. When it comes to square boxes, fine, I can plug and chug and figure this stuff out and build a box. But I am trying to build a trapezoidal box and its just killin me.

My goals are 1.2" net area, 34hz, 10 height x variable (~22-24) width x (13 top and 14.5 bottom) depth. I can't figure out how to make the calculators online (WinISD for example) calculate a port that uses a slanted side.

I want the port and sub to fire up. Here is the shape from the side, and then one from the top -

http://i46.photobucket.com/albums/f111/taylormargot/side.jpg

http://i46.photobucket.com/albums/f111/taylormargot/top.jpg

If I'm a total failure for, well, failing at this please let me know lol :crap:

DonH
03-25-2009, 07:54 PM
so you want a wedge box with the sub a port on the top??? also. what sub? how much power? details please

Supergumby5000
03-25-2009, 07:55 PM
well, considering that the box above has a gross volume of 1.65cu ft without the angled part (13" depth), you can most likely net 1.2cu ft without the stupid angle.

Why would you want an angled port anyways though? You want the surface area of the port to be the same throughout the length of the port, so the only spot an issue would arise would be going from a flat port wall to the angled port wall, and converting the size of the port at that spot.

Any particular reason you are doing this trapezoidal?

Supergumby5000
03-25-2009, 07:55 PM
just do some aeroports, or dont have the port run along the angled wall.

DonH
03-25-2009, 07:57 PM
just do some aeroports, or dont have the port run along the angled wall.

DING DING DING!

UCbizerkeley
03-25-2009, 07:58 PM
so you want a wedge box with the sub a port on the top??? also. what sub? how much power? details please

Yes...that is correct. 10" RE SE on 600-800rms.

well, considering that the box above has a gross volume of 1.65cu ft without the angled part (13" depth), you can most likely net 1.2cu ft without the stupid angle.

Why would you want an angled port anyways though? You want the surface area of the port to be the same throughout the length of the port, so the only spot an issue would arise would be going from a flat port wall to the angled port wall, and converting the size of the port at that spot.

Any particular reason you are doing this trapezoidal?

Just to keep the box width a bit smaller, have it fit snug against the seats. Maybe it's stupid; you're right. If you are telling me straight away that there is no easy way to do this, I'm buildin a regular box.

Supergumby5000
03-25-2009, 07:59 PM
just do some aeroports, or dont have the port run along the angled wall.

if the angled wall is a must, do this

UCbizerkeley
03-25-2009, 08:06 PM
aeroport, eh. thought never occurred to me, mainly because i had no idea what an aeroport was until 3 mins ago. guess i'll start reading.

edit - wow is it really that simple. just use the calculator on the PSP site and it tells you the size of port to put in the box?