need help tuning on an re se (port length)

[Doberdad 10+ year member]

can someone tell me how long i should make each of my four 3inch ports if my box dimensions are (L,24")(W17")(H12") thnx ahead //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

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[KARLEON 10+ year member]

it depends on what you want ur enclosure to be tuned too.....

Check out audiobahns website. its easy to calculate it there. but if u dont want too, i'll do it for u

 

[Doberdad 10+ year member]

i think its reccomended for 35hz

 

[KARLEON 10+ year member]

Ok, you have a total of 2.83 cubes worth of airspace before any displacements. I dont know exactly what your subs displace nor your port, or even if you will be using any internal bracings that might affect loss of airspace, but this is what i came up with.......

No displacements accounted for what so ever and using 2.83 as total amount of airspace = 19.79inches long

Using 2.5 cubes are your airspace (trying to account for any displacement you might have) it would be 22.69inches long

Now im no professional installer or i dont build boxes as my source of income, so if anyone see a problem with my calculations, then feel free to address it. Im just trying to help out. But i will put the figures in Bass Box Pro 6 and see if they differ than audiobahns website

 

[KARLEON 10+ year member]

whoa, hold up. i might have made a mistake.....are those dimensions inner or outer? Im assuming outer dimensions were given....you have a total of 2.119 cubes of airspace to work with.

No displacements accounted for...... it would be 27.16 inches long.....

(before i forgot to account for wood displacement) but then again, i did say before any displacements)

 

[Doberdad 10+ year member]

so all of the length of the ports should add to 27.6in.?

 

[KARLEON 10+ year member]

according to audiobahns website.....unless you are suppose to divide that by the number of ports you have, but it doesnt say to do all that, so i take it as each one being that size

 

[Doberdad 10+ year member]

there is not really a possible way of doing that unless i add more ports. its is longer than the length of the box

 

[KARLEON 10+ year member]

you can bend the port...the port doesnt have to be straight