why do aero ports have to be so confusing?

[t1990le 10+ year member]

Im doin a new box for my 12s and i need some suggestions for doing aero ports. Box will be 4.08 cu ft after sub displacement. What diameter and length of aeros do i need to have a tuning close to 38hz? Any and all suggestions appreciated.

Click to read more...

 

[kodak314 10+ year member]

http://psp-inc.com/tools.html

 

[Buck 5,000+ posts]

Do a 6 incher

 

[t1990le 10+ year member]

Do a 6 incher

i thought about that. A 6" aero thats 9.5" long will give me a tuning of 38hz but is that too much volume of port per cu ft?

 

[SicAudio 5,000+ posts]

lol 28 sq inches for 4 cubes? are you serious?

how is that too much its just barely enough //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[Toone 10+ year member]

4/28=not too much

 

[t1990le 10+ year member]

lol 28 sq inches for 4 cubes? are you serious?
how is that too much its just barely enough //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

lol i guess so idk how to calculate aero ports.

 

[SicAudio 5,000+ posts]

7 square inches per cub = no where near too much

 

[SicAudio 5,000+ posts]

r2xpi = port area

6" port is 3 x 3 x3.14 = 28.56 square inches / 4cf = 7 square per cf //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[ascitiesburn69 10+ year member]

do 3 4's would be around ~9"^2 of port per cube.

 

[t1990le 10+ year member]

7 square inches per cub = no where near too much

but is it enough though?

 

[ascitiesburn69 10+ year member]

but is it enough though?

Enough yes. But it could stand to be a bit more.

 

[t1990le 10+ year member]

Enough yes. But it could stand to be a bit more.

with 3 4" aeros, what length would they have to be to tune it around 38hz

 

[SicAudio 5,000+ posts]

enough depends on the subs if you have more than 15mm xmax per sub then do 3 4" ports

 

[SicAudio 5,000+ posts]

with 3 4" aeros, what length would they have to be to tune it around 38hz

15" long for 3- 4" ports