Closed Thread
Results 1 to 7 of 7

Reload Thread: port calculating problems

  1. #1
    bigtbuck's Avatar
    bigtbuck is offline Member



    Join Date
    Mar 2003
    Location
    Leon, IA
    Posts
    44
    Post Thanks / Like
    Mentioned
    0 Post(s)

    port calculating problems

    hey guys, heres the deal. im building a box for my 12 inch type r. its going to be 1.4275 ft^3 after displacement and i want it tuned to ~ 30 hz. when im typing in the information on a port calculator it tells me my slot port needs to be 47 inches long. i typed in 12.5 inches for the port height with a 2 inch width. What am i doing wrong here, that doesnt sound right?

    my dimensions (external) are 14hx16wx18d.

    If you can help me out here, it'd be appreciated. If any of you have a ported box you've made i'd appreciate the dimensions and how long your port is. i need them as soon as possible







  2. #2
    bigtbuck's Avatar
    bigtbuck is offline Member

    Threadstarter


    Join Date
    Mar 2003
    Location
    Leon, IA
    Posts
    44
    Post Thanks / Like
    Mentioned
    0 Post(s)
    well im very new with all of this stuff. i want to build a box with a slot port, tuned to around 30 hz. do you got any suggestions?




  3. #3
    bigtbuck's Avatar
    bigtbuck is offline Member

    Threadstarter


    Join Date
    Mar 2003
    Location
    Leon, IA
    Posts
    44
    Post Thanks / Like
    Mentioned
    0 Post(s)
    alright thanks jmac. i read about your car getting broken into, that *****. just whenever you get the time man




  4. #4
    bigtbuck's Avatar
    bigtbuck is offline Member

    Threadstarter


    Join Date
    Mar 2003
    Location
    Leon, IA
    Posts
    44
    Post Thanks / Like
    Mentioned
    0 Post(s)
    just moving the article back up.

    jmac your help would really be appreciated whenever you get the time




  5. #5
    bigtbuck's Avatar
    bigtbuck is offline Member

    Threadstarter


    Join Date
    Mar 2003
    Location
    Leon, IA
    Posts
    44
    Post Thanks / Like
    Mentioned
    0 Post(s)
    alright thanks a lot jmac. i was typing on the port calculator but i didnt think i was doing it right, i didnt know it was normal for the port to be that long, but then again i dont know anything about ported boxes. sorry for bugging you, i know i had 2 or three different threads that were all pretty much about the same thing and you posted on all of them. i just assumed i'd messed up on the port calculator. but thanks a lot you've showed me how this needs to be done so hopefully from now on i'll be able to design my own boxes.

    my next project is to replace my sealed box for my edk. only problem is it goes underneath the seat in a 99 extended cab, so it may be awful hard to make room for it. i'm wanting to get another one (i've got one 10" k right now), but im pretty sure it'll be impossible to port two k's with as little space as i have right now.

    but thanks again for all your help.




  6. #6
    bigtbuck's Avatar
    bigtbuck is offline Member

    Threadstarter


    Join Date
    Mar 2003
    Location
    Leon, IA
    Posts
    44
    Post Thanks / Like
    Mentioned
    0 Post(s)
    i guess i do have one last question:

    does it matter where the sub is placed? like does it need to be over close to one side, or in the center, or what?

    thanks




  7. #7
    jlaudiow6's Avatar
    jlaudiow6 is offline Member



    Join Date
    Apr 2003
    Location
    san diego
    Age
    35
    Posts
    121
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: port calculating problems

    Where do you get the slot port calculator? Cause i'm makeing a fiber glass box for my car but the speaker is too heavy and the enclosure will roll if i brake really hard.

    I need to make a bigger enclosure with Slot ports to make the enclosure ;more stable in my car for driving.




Closed Thread

Similar Threads

  1. extreme port?!?
    By yourmomonacid in forum Enclosure Design & Construction Help
    Replies: 7
    Last Post: 08-18-2003, 12:35 AM
  2. dual 12k slot port help!
    By Q45guy in forum Enclosure Design & Construction Help
    Replies: 9
    Last Post: 08-15-2003, 09:21 PM
  3. How to tune a box?
    By KJL_21 in forum Subwoofers
    Replies: 2
    Last Post: 08-04-2003, 01:17 AM
  4. port problems
    By stangpounder in forum Enclosure Design & Construction Help
    Replies: 1
    Last Post: 07-30-2003, 12:04 PM
  5. slot port help!
    By namster44 in forum Enclosure Design & Construction Help
    Replies: 4
    Last Post: 07-29-2003, 06:15 PM

Posting Permissions

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