dumb question please help

[sweenster123 10+ year member]

How do u know what to deduct for bracing? //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

Ok and for port displacement. im not entirely dumb i promise just havent reallt built a box to a specific spec like this one.

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[pr-festiva 10+ year member]

it depends on the shape,,LXWXH for some thing like a 2x4 RXRX3.14Xlength for dowels both in inches then devide that by 1728 to get how many cubes it takes up.

 

[blackdragonaudi 10+ year member]

What he said

 

[sweenster123 10+ year member]

it depends on the shape,,LXWXH for some thing like a 2x4 RXRX3.14Xlength for dowels both in inches then devide that by 1728 to get how many cubes it takes up.

thanks thats what i was thinkin but wasnt sure. //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[PioneerSPL1990 10+ year member]

if its a square board cut if half corner to corner its likely a 45 degree angle. so double it back up, giving you an imaginary square to work with and do the above, then divide by to and theres your displacment.

 

[sweenster123 10+ year member]

Ok and for port displacement. im not entirely dumb i promise just havent reallt built a box to a specific spec like this one.

 

[PioneerSPL1990 10+ year member]

look up cylindrical volume calculator. use the circumfrance calculator. thats you best bet. and to exactly measure the port i'de use a cloth ruler.

 

[sweenster123 10+ year member]

what would you recommend for port size? How many square inches going to be ported around 35Hz

look up cylindrical volume calculator. use the circumfrance calculator. thats you best bet. and to exactly measure the port i'de use a cloth ruler.

 

[pr-festiva 10+ year member]

that depends on sub used and box size,,what ya useing?

 

[sweenster123 10+ year member]

that depends on sub used and box size,,what ya useing?

Im going with 2 15" re se's d2. Box size before port and bracing displacement is roughly 8.8 cubes. im hoping between bracing and port displacement it will come down.

 

[pr-festiva 10+ year member]

need to know how much brace displacement your gonna have and how much the subs displace also

 

[sweenster123 10+ year member]

that figure is after sub displacement. i dont know on bracing. i havent figured it yet but im going to brace the hell out of it. so i guess ill have to wait to actually get it build to port it. im going to do a removeable port. i have another question tho. i have a 4 door kia back seat is coming out so i can do this. what way would you recommend facing the port. and same goes for the subs. forwards or up?

need to know how much brace displacement your gonna have and how much the subs displace also

 

[pr-festiva 10+ year member]

all cars react different to loading you will have to just experiment to find out which works best.pioneerspl1990 is doing a half wall in his car he might be able to give a couple pointers.the half wall i tryed in my mustang sucked lol

 

[sweenster123 10+ year member]

you could consider this a half wall its gonna be about 12 inches from the ceiling of the car. its gonna be interesting. im hoping for a good outcome. guess ill see.

all cars react different to loading you will have to just experiment to find out which works best.pioneerspl1990 is doing a half wall in his car he might be able to give a couple pointers.the half wall i tryed in my mustang sucked lol

 

[IDSkoT 5,000+ posts]

How do u know what to deduct for bracing? //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif
You find the area it takes up. ZOMG. If it's a dowel, use the cylinder formula, if it's a brace made out of 2x4, or whatever, just use the area (LxWxH). It's not that complex of a concept...

Ok and for port displacement. im not entirely dumb i promise just havent reallt built a box to a specific spec like this one.

Port displacement is the amount of space the port displaces and will solely rely on the tuning of the box and the width of the port...

Answered.