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View Full Version : embarrasing question :/ port displacement??????

rickymac21
05-15-2009, 10:19 AM
i have built many boxes .. most of them pretty loud... but i havent ever been told or actually learned a formula to calculate port displacement... re's website has a box designer that calculates the displacement for you so i dont usually have too... but say i need 200 sq inch of port tuned to 35 hertz... how would i calculate it?

basically the box is going to be a rectangle. real simple. 35" wide 15" tall and ???deep... no longer than 56" deep. needs to have 12.5 cubes net... someone want to help me out with this??

marcotheclepto
05-15-2009, 10:21 AM
winisd?

JordyO
05-15-2009, 10:22 AM
i have built many boxes .. most of them pretty loud... but i havent ever been told or actually learned a formula to calculate port displacement... re's website has a box designer that calculates the displacement for you so i dont usually have too... but say i need 200 sq inch of port tuned to 35 hertz... how would i calculate it?

basically the box is going to be a rectangle. real simple. 35" wide 15" tall and ???deep... no longer than 56" deep. needs to have 12.5 cubes net... someone want to help me out with this??

It's a very complicated formula..... just use port calculators.

It's not embarassing... that's how everyone does it ;)

S.B.C.
05-15-2009, 10:23 AM
ygpm

rickymac21
05-15-2009, 10:23 AM
dont want to download anything to my computer.. its slow enough as it is... there isnt any formula?? i mean theres one to figure out the inner cubic ft of a box.....

jdawg
05-15-2009, 10:24 AM
round or square?

marcotheclepto
05-15-2009, 10:24 AM
im working it out atm... somoeone pmed you maybe they have the answer

rickymac21
05-15-2009, 10:26 AM
pm replied... thanks.... and its square. ^^^^ slot port..

jdawg
05-15-2009, 10:27 AM
width time height gives you area

S.B.C.
05-15-2009, 10:29 AM
Actually bro, getting raped in jail is embarassing- Thats just a good ? :D

marcotheclepto
05-15-2009, 10:37 AM
52x15x35

port 8side x 13.5side x 9.4deep

marcotheclepto
05-15-2009, 10:38 AM
someone double check my math...

marcotheclepto
05-15-2009, 10:40 AM
actually nevermind need to redo didi 108 sq in of port thought you needed 100 :(

marcotheclepto
05-15-2009, 10:45 AM
with ~ 200 sq in or port tuned to 35 with your max demensions you end up with like 12.1 cuft..

S.B.C.
05-15-2009, 10:49 AM
Yea, its about 192sq in of port