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Onebadsrt
12-17-2008, 08:58 PM
i know im new at the whole audio thing im just trying to do it right. im going to have about a 6.5 cubic ft ported box with a slant rear. the dimensions will be close to
W=44
H=18
bottem D=20
top D=16

and the port will be firing upward so how do i figure what size port i need to make the box sound good?

Onebadsrt
12-17-2008, 09:04 PM
i guess what im meaning is for instance if i wanted it to be tuned to 32hz or 34hz how would i go about figuring what size port i need to achieve that?

sorry to be a pest but thanks.

DonH
12-17-2008, 09:07 PM
i guess what im meaning is for instance if i wanted it to be tuned to 32hz or 34hz how would i go about figuring what size port i need to achieve that?

sorry to be a pest but thanks.

YO I GOT U COVERED MAN! dang yo! ima do a design with aeros!

Onebadsrt
12-17-2008, 09:25 PM
thanks alot bro, you have been a ton of help.

if you ever need a s/c, turbo, or n2o installed then maybe i can help you out lol!

Onebadsrt
12-17-2008, 09:38 PM
would you have any idea of how to calculate a box with this shape to make 6.5 cubic ft while maintaing the 44in length and 18 ht, because this would be the perfect box but that link i did my calculations on only had rectangle, sloped, etc. . . and i just drew a port to show the top, the aero ports you were talkin about would be sweet up there to

http://i85.photobucket.com/albums/k66/onebadgt/subbox.jpg

andrew2944r
12-17-2008, 09:42 PM
would you have any idea of how to calculate a box with this shape to make 6.5 cubic ft, because this would be the perfect box but that link i did my calculations on only had rectangle, sloped, etc. . . and i just drew a port to show the top, the aero ports you were talkin about would be sweet up there to

http://i85.photobucket.com/albums/k66/onebadgt/subbox.jpg

**** did you do that on your Etch-A-Sketch, :D

Good design though!

DonH
12-17-2008, 09:44 PM
thanks alot bro, you have been a ton of help.

if you ever need a s/c, turbo, or n2o installed then maybe i can help you out lol!

its cool man haha no big but w/e cant say no haha i went with a vented port. u will have 71.5 square inches of port :D tuned to 35 hz

here is a screen shot of a top view...its ur dimensions u already stated

http://i368.photobucket.com/albums/oo125/don_hampton90/boxthreetwelves1.jpg

here is a shot of the inside and port. to construct the port its just three pieces. the two sides which are identical and then the back piece. screw the three together outside the box then put em in and screw em down :)
http://i368.photobucket.com/albums/oo125/don_hampton90/boxthreetwelvesport.jpg

edit: that blue # says 3 5/16

andrew2944r
12-17-2008, 09:51 PM
Nice sketch D man1, I would put a brace between each sub top to bottom and the same length as the back of the magnet.

Onebadsrt
12-17-2008, 09:54 PM
holy hell, i def did etch a sketch, i dont know how you did that but its awesome, the only diff would be the flat side would be where the subs are mounted and the slope would be on the port side of the box against the back of my rear seats, but that fantastic! what program did you do that on?

DonH
12-17-2008, 09:56 PM
holy hell, i def did etch a sketch, i dont know how you did that but its awesome, the only diff would be the flat side would be where the subs are mounted and the slope would be on the port side of the box against the back of my rear seats, but that fantastic! what program did you do that on?

sketchup. and no FVCKN WAY! **** gotta do a new one! ight man h.o give me a lil sec.

Onebadsrt
12-17-2008, 09:57 PM
ill def either use that design exactly or this one if i can fill in the blanks to equal 6.25-6.75 ft lol, but i wont count on that one

how you like this etch a sketch lol i think i needa shake it again lol

http://i85.photobucket.com/albums/k66/onebadgt/subbox1.jpg

andrew2944r
12-17-2008, 10:00 PM
haha, doing good man.

Uhrin
12-17-2008, 10:01 PM
very good sketch. Do you like that program? I use auto cad and it is very cool and easy.

Onebadsrt
12-17-2008, 10:05 PM
very good sketch. Do you like that program? I use auto cad and it is very cool and easy.

i used cad back in school designing bridges etc.. wish i still had it i could have at least drawn a rectangle with holes in it lol

IDSkoT
12-17-2008, 10:06 PM
ill def either use that design exactly or this one if i can fill in the blanks to equal 6.25-6.75 ft lol, but i wont count on that one

how you like this etch a sketch lol i think i needa shake it again lol

http://i85.photobucket.com/albums/k66/onebadgt/subbox1.jpg

Make the side parts into triangular prisms, then use the rest as an average box.


very good sketch. Do you like that program? I use auto cad and it is very cool and easy.

GoogleSketchUp, a very basic and simple CAD-like program. It's really popular around here for Box designing / visualizations.

Onebadsrt
12-17-2008, 10:12 PM
[QUOTE=IDSkoT;5581991]Make the side parts into triangular prisms, then use the rest as an average box.


sry but me no speak audio, i know its prob something very basic but im not exactly sure what you mean?:confused:

DonH
12-17-2008, 10:30 PM
k here is the box. phew took a while but got it. for the port pieces u just cut each piece at the same angle as the front face.

http://i368.photobucket.com/albums/oo125/don_hampton90/boxthreetwelves2.jpg

Onebadsrt
12-17-2008, 10:37 PM
That is awesome. Thank you! So you would make the port para. With the sub side instead of at a angle para. With the back wall?

DonH
12-17-2008, 11:07 PM
That is awesome. Thank you! So you would make the port para. With the sub side instead of at a angle para. With the back wall?

what? dont get what ur asking? i now it has 2 do with the port but huh? u asking on what angles 2 cut the port pieces?

Uhrin
12-17-2008, 11:17 PM
I think he means parallel where he says para......... I think?

DonH
12-17-2008, 11:20 PM
I think he means parallel where he says para......... I think?

if thats what he means then NO! u make the top and bottom cuts of the port parallel with the angle of the back panel! ANGLE OF THE BACK PANEL!

Onebadsrt
12-17-2008, 11:24 PM
what? dont get what ur asking? i now it has 2 do with the port but huh? u asking on what angles 2 cut the port pieces?

i was just asking which way i should mount the port, heres a etch a sketch to demonstrate, which one should i use




http://i85.photobucket.com/albums/k66/onebadgt/sub.jpg

DonH
12-17-2008, 11:29 PM
i was just asking which way i should mount the port, heres a etch a sketch to demonstrate, which one should i use




http://i85.photobucket.com/albums/k66/onebadgt/sub.jpg


oooh so sorry man heres a screen shot! sry 2 post it! haha and its the second lil drawing u did! hence three pieces :D!

http://i368.photobucket.com/albums/oo125/don_hampton90/untitled4545.jpg

Onebadsrt
12-17-2008, 11:53 PM
thanks man you have been such a help!

DonH
12-18-2008, 12:40 AM
yup yup gl with the build! shoot me a pm when u need help :D