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KHARPS
06-06-2009, 10:08 AM
I put together a few designs in sketchup for 4-12s. Since it will be in a blowthrough there are a few angled boards which are making it hard for me to determine the overall volume and tuning. Can one of you guys help me out? I'm aiming for 8@33

dappa5
06-06-2009, 10:38 AM
go to http://photobucket.com/ (http://photobucket.com/)
create an account then go to your sketch up click file then export cllick export 2d make sure to change file type to j.peg
then go to your photobucket and up load the newly formed j.peg

KHARPS
06-06-2009, 10:40 AM
go to http://photobucket.com/ (http://photobucket.com/)
create an account then go to your sketch up click file then export cllick export 2d make sure to change file type to j.peg
then go to your photobucket and up load the newly formed j.peg

Ok thanks. I have an account already so I'll go give that a shot.

dappa5
06-06-2009, 10:41 AM
then copy the direct link and insert it into your posts using the little picture icon on top remember to delete the field before inserting your link

KHARPS
06-06-2009, 10:57 AM
Thanks dappa.

http://i313.photobucket.com/albums/ll385/tezin87/3.jpg

KHARPS
06-06-2009, 11:14 AM
http://i313.photobucket.com/albums/ll385/tezin87/new.jpg

dappa5
06-06-2009, 11:55 AM
look familiar supergumby ???
any way just look @ model from above and use the measure tool to disect the model
like thishttp://i668.photobucket.com/albums/vv50/DAPPA5/mm3.jpgthen find area of the squares
the triange is found by dividing that square by 2
add all areas up and multiply by your height and viola'

dappa5
06-06-2009, 11:57 AM
just remember to draw a dotted line on all of your inside dimentions

KHARPS
06-06-2009, 02:21 PM
They're both only coming out to like 3.7 cubes per side before sub displacements or even a double baffle :(

dappa5
06-06-2009, 07:05 PM
sounds about right how tall is it ?
cuz @ 15 in tall the whole box 40"x40"x15" only = 11.5
thats just the square not counting braces, subs , or that giant azz port so 3.7 sounds about right 3.7+3.7=7.4 11.5-7.4=4.1 that is a big horn

KHARPS
06-06-2009, 09:10 PM
sounds about right how tall is it ?
cuz @ 15 in tall the whole box 40"x40"x15" only = 11.5
thats just the square not counting braces, subs , or that giant azz port so 3.7 sounds about right 3.7+3.7=7.4 11.5-7.4=4.1 that is a big horn

Yeah that center section is pretty big. But when I asked Jack, the guy with the 6-15'' LV4XLs in a blowthrough, how the center section effects the tuning he said just make it bigger than the port (which in my case is 9'') and it shouldn't effect it.

dappa5
06-06-2009, 11:00 PM
no it should be fine how much air do your subs want?
if you need more just build the box to drop in around the wheel wells rather than between them should add bout 2 cubes total one each side that'll put you over 9 cubes total w/o changing your port and horn ratios

KHARPS
06-06-2009, 11:49 PM
no it should be fine how much air do your subs want?
if you need more just build the box to drop in around the wheel wells rather than between them should add bout 2 cubes total one each side that'll put you over 9 cubes total w/o changing your port and horn ratios

I like your thinking man but my truck is a stepside so the wheel wells aren't that big inside the bed. It wouldn't add a ton of space but a little is better than none.

And jblcamry gave me a tip on sketchup to find the volume. All you do is:
1) draw a line across the port on the face of the box to seal off the space you want to find the volume for
2) select the pointer tool
3) click the area so it's highlighted
4) right click and select area-selection
5) take that number and multiply by 144
6) mulitply that number by the height of the inside of your box
7) divide that number by 1728

KHARPS
06-07-2009, 01:08 AM
http://i313.photobucket.com/albums/ll385/tezin87/new-1.jpg

Should be right around 8.5 cubes before any sub or bracing displacements.

dappa5
06-07-2009, 01:26 AM
ok? is that your final design?

KHARPS
06-07-2009, 10:56 AM
ok? is that your final design?

Unless someone thinks there will be a loading issue with the subs firing that close to each other across the chamber.

dappa5
06-07-2009, 03:20 PM
pm supergumby5000 his set up is pretty similiar

Pioneer~Saturn
06-07-2009, 03:44 PM
To make volume a sinch...just use the line tool and draw a line acrossed the opening into the port so you can highlight just the airspace portion of the enclosure (basically take the line tool and outline the area you want to calculate) and right click, go to info on the section and it'll tell you how many sq feet of area it is and then simply devide the height (in inches) by 12 to get feet and multiply the two to get your airspace for the space :)

KHARPS
06-07-2009, 08:35 PM
Thank you sir! It's looking like I might shy away from 4-12s though because I can't bring myself to give up all the bed space since I use the bed all the time. I drew up a new design for 2-12s that is 5'' wider than the box I have now and the same depth. It is 5@33. The only reason why I want to switch setups is because I plan to get a bigger amp in the future and I know the LV4s can't handle any more power. I'm thinking of going with either LV4XLs, AA Havocs, BTLs, or something else that will kill the lows and handle 2k or more daily.

http://i313.photobucket.com/albums/ll385/tezin87/533.jpg

dappa5
06-07-2009, 08:39 PM
nick get back to my band pass thread lol lol