Thought i would post some previous boxes i have built pics inside

[mobeious 10+ year member]

iv got some ideas brewing right now for that box for 4 12's

 

[snfsh79077 10+ year member]

ok well I uploaded a picture of the box I built in my gallery

 

[mobeious 10+ year member]

ok? if u want but i already have a design drawn up

 

[snfsh79077 10+ year member]

ok well nvm I was just showing him a design I had to see if he liked it

 

[snfsh79077 10+ year member]

what am I supposed to be looking for at quarterwave.com

 

[mobeious 10+ year member]

thats tells u the 1/4 theory and how to design one

 

[snfsh79077 10+ year member]

this is some work ive been figuring about my transmission box. im making one for one of my 10s so i can get some trial and error out of the way before making the real one. does this sound right?

1130 / 30.805 = 36.68 / 4 = 9.17 ft (1/4 wave) throat length.

6.25 (1/2 of enclosure height) x 6.25 x 3.14 (pi) = 122.72 sq in.

9.17/3 (number of folds) = 3.06 ft.

3.06 x 12 ( converting into inches ) =36.68 inches long.

radiating area of subwoofer / internal hight of enclosure = throat width

46.8 / 12.5 = 3.74 inch wide throat

port length = 36.68 inches long,

port width = 3.74 inches

 

[mobeious 10+ year member]

no that doesnt sound right

lemme see if i can help ya

2 10's? and what is the Fs of the woofer

 

[snfsh79077 10+ year member]

one ten and the fs is 30.805

 

[mobeious 10+ year member]

so ur throat area should be 78.5sq and a throat length of 111.14inches

 

[jadon087 10+ year member]

Map Props to you on your box building skill mobeious, thats some real nice fabrication man. And that ul12 only weighs 16.6lbs thats pretty nice for it being able to handle that much power.

 

[mobeious 10+ year member]

UL 12?? did i miss somthing..... thanxs for the props

 

[snfsh79077 10+ year member]

ok thanks, i didnt specify but that 36.68 was one run in the port making it 110.04 inches long total with three folds. what caused me to be off?

 

[mobeious 10+ year member]

mybad ur right its 110.04 i must have hit a wrong number

 

[Immacomputer 10+ year member]

Transmission line enclosures are not always going to use the Fs of the driver and the Sd of the driver for line length and line area. I wouldn't recommend taking that route as you will most likely end up with an efficient enclosure that is huge. You could easily get the same response and output with a ported enclosure that would be much smaller.