Closed Thread
Results 1 to 5 of 5

Reload Thread: port width

  1. #1
    SMS's Avatar
    SMS
    SMS is offline CarAudio.com Elite



    Join Date
    Nov 2010
    Location
    MA
    Posts
    635
    Post Thanks / Like
    Mentioned
    19 Post(s)

    port width

    I have been using a port calculator to get port dimensions to acheive 34Hz, I have noticed the narrower you go to shorter the length-so what is the best width for a 12"? Ive been going with 1.75- 2.375 with a few boxes ive made latly.
    Also what specs are needed to make a custom box design? I have a Megaloud VX2 and it came with no specs.
    The sub sounds best in the box at the shop-2.5cuft 30" long x15"-x15" it has a port coming out the side that is 2.75"wide 13.5" tall and 14" long. According the calculater I use thats like 48Hz or so, but it sounds really nice, goes really low, sounds 10 times better than any box Ive made for it on the same amp. The problem is its too long for my trunk.
    Im looking for a custom design, I have the 2.5cuft but its not a true rectangle .
    Im willing to pay but I dont have paypals so I would have mail a $ order, Im very bad with computers -cant even get a pic up so I would have to talk to you or send you the layout of the shape I need.
    Thank you for any help and reading this rambling clusterf*** of a thread.







  2. #2
    kushy_dreams's Avatar
    kushy_dreams is offline The resident hippie



    Join Date
    Sep 2009
    Location
    twenty past four
    Posts
    4,091
    Post Thanks / Like
    Mentioned
    25 Post(s)

    Re: port width

    PM Ram Designs or email Buck



    13 Dodge Dart Rallye 1.4T


    http://mobileaudioforum.com/forum/forum.php<

    BOYCOTT SKAR AUDIO! SHADY BUSINESS PRACTICES SHOULD NEVER BE ENCOURAGED!

  3. #3
    pro-rabbit's Avatar
    pro-rabbit is offline Moderator pro-rabbit is a Supporting Member of the forum!

    pro-rabbit is a Supporting Vendor of the forum!

    Join Date
    Jan 2004
    Location
    OKC, OK
    Age
    32
    Posts
    12,395
    Post Thanks / Like
    Mentioned
    373 Post(s)

    Re: port width

    RAM_Designs or myself could get you a design.

    As for the port width it depends on the total port area you need to achieve. Port area depends on what sub(s) you have and what the air space will be.




  4. #4
    hispls's Avatar
    hispls is offline CarAudio.com Veteran



    Join Date
    Sep 2009
    Location
    Cape Cod, Massachusetts
    Posts
    6,094
    Post Thanks / Like
    Images
    15
    Mentioned
    105 Post(s)

    Re: port width

    If you can drive down to the cape I can build you a box for cost of materials.

    To properly design a box you need the Theil Small parameters of the sub (Fs, Qts, and Vas in particular). If you're close by I can measure them for you as well.

    Keeping port as wide as possible helps airflow, how much area you need is dependent on a few factors, but largely how much air the sub displaces at full power. From there as long as you're not hearing port turbulence you get marginal gain from going larger with your port, but it's a bit of a diminishing return, so if space is an issue you don't need to go as big as some ppl claim.. Round is optimum if you can fit it. 48hz tuning sounds a bit high for daily... I've tried it and am not impressed.




  5. #5
    RAM_Designs's Avatar
    RAM_Designs is offline SketchUp Master



    Join Date
    Feb 2006
    Location
    Rockwall, TX
    Age
    28
    Posts
    21,044
    Post Thanks / Like
    Images
    1
    Mentioned
    97 Post(s)

    Re: port width

    Quote Originally Posted by pro-rabbit View Post
    RAM_Designs or myself could get you a design.

    As for the port width it depends on the total port area you need to achieve. Port area depends on what sub(s) you have and what the air space will be.
    Quote Originally Posted by hispls View Post
    If you can drive down to the cape I can build you a box for cost of materials.

    To properly design a box you need the Theil Small parameters of the sub (Fs, Qts, and Vas in particular). If you're close by I can measure them for you as well.

    Keeping port as wide as possible helps airflow, how much area you need is dependent on a few factors, but largely how much air the sub displaces at full power. From there as long as you're not hearing port turbulence you get marginal gain from going larger with your port, but it's a bit of a diminishing return, so if space is an issue you don't need to go as big as some ppl claim.. Round is optimum if you can fit it. 48hz tuning sounds a bit high for daily... I've tried it and am not impressed.
    This and this.



    1,400+ designs since March 2011...
    I have my PM's turned off, please email at Ryan@RAM-Designs.com

Closed Thread

Posting Permissions

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

1e2 Forum