Closed Thread
Results 1 to 2 of 2

Reload Thread: port lenth help! got all other dimensions

  1. #1
    mac bleeze's Avatar
    mac bleeze is offline Senior VIP Member



    Join Date
    Dec 2004
    Location
    seattle, wa
    Posts
    419
    Post Thanks / Like
    Mentioned
    0 Post(s)

    port lenth help! got all other dimensions

    first off thanks to bcarpenter for helping me with the box design... we came up with 31x15x16 widthXheightXdepth for external box dimensions for a ported box. widthXheightXdepth... we also got the vent size of 2.75 x 13.5 and are tuning is somewhere around 32 hz. the thing we cant figure out is the port length.. we came up with somewhere around 40-45". After that he could no logner help me. another thing i dont kno how to put 40-45 inches of port lenth. 31+16 equals 47 and yea not sure what i would need to do.. ne help or pictures of there port length..; im not sure what port lenth really is. i do but a very vague idea from what my jl audio specs sheet tells me. so if u can please help. my aim adress is bigjonny33 if u want to im me there.







  2. #2
    Nikuk's Avatar
    Nikuk is offline Been Gone Too Long



    Join Date
    Jul 2004
    Location
    Buffalo, NY
    Age
    33
    Posts
    7,854
    Post Thanks / Like
    Images
    5
    Mentioned
    0 Post(s)

    Re: port lenth help! got all other dimensions

    Please try to make your posts a lil more legible. Puncuation is not very hard.

    If You are running .75" mdf walls & .75" MDF slot port with a common wall then I have your results as follows:

    Gross Volume: 3.342 (31x15x16 external = 29.5x13.5x14.5 internal).

    You didn't give woofer displacement.

    Port area of 37.125 sq in. with a length (straight) of 40" you're tuned to 31.4hz with a net vB of 2.252 cubes.

    To tune to 32.02hz - You'd need 36.5" port length.

    You'd have to run a "labyrinth" port:
    1st board 13.25"
    2nd board 12.5"
    3rd board 5.75".


    Good luck



    -Nick



    What the f00k happened to this place?

Closed Thread

Similar Threads

  1. port bend question
    By pj_chevy03 in forum Enclosure Design & Construction Help
    Replies: 8
    Last Post: 11-01-2004, 08:06 AM
  2. port volume Q
    By maniackilla in forum Enclosure Design & Construction Help
    Replies: 7
    Last Post: 10-01-2004, 03:54 AM
  3. J-
    By BigBoomer in forum Enclosure Design & Construction Help
    Replies: 16
    Last Post: 01-06-2003, 03:50 PM
  4. Box for port wars...
    By F150Matt in forum Enclosure Design & Construction Help
    Replies: 4
    Last Post: 01-05-2003, 03:22 PM
  5. Port dimensions
    By Wkerat in forum Enclosure Design & Construction Help
    Replies: 0
    Last Post: 11-24-2002, 11:58 AM

Posting Permissions

  • You may not post new threads
  • You may post replies
  • You may post attachments
  • You may edit your posts
1e2 Forum