/ Register

What determines best port area ???

Discussion in 'Subwoofer Box and Custom Fabrication' started by Fish Chris, Oct 4, 2008.

  1. Fish Chris

    Fish Chris Full Member

    I see vented enclosures with HUGE port areas. Then, I see some other enclosures with round vents that are much smaller, and both can sound great.

    Which of the speaker specs can be used to determine the optimum port area ? ......or, does it depend on whether a guy is going for SPL, or SQ ?

    Most of the sub enclosure programs I see, allow you to choose the port size, then simply figure the right length, in relationship to that port area, for a specific tuning frequency..... But I haven't really seen where the program will pick the best port area for your enclosure, as well.

    Hmmm,
    Fish
     
    Fish Chris, Oct 4, 2008
    #1
  2. G3n3R@1

    G3n3R@1 Full Member

    most programs will show you the rear port velocity. try to keep it under 100 ft/sec to prevent port noise.
     
    G3n3R@1, Oct 4, 2008
    #2
  3. electrolytic

    electrolytic Full Member

    The program tells you by reading the graphs what the port size should be, depending on how big the box is and what tuning you want to get, if you type in something too big or too small you will see when you plot it on the graph that it is out of range, the speaker specs and number of speakers play a role too but you can't look at speaker specs only and expect to know what it should be tuned to. Unless you do it over and over and get an idea of how it will likely turn out. Go build that 39 hz slanted box i designed, hurry up!! lol I'm pretty sure you won't be disapointed.
     
    electrolytic, Oct 4, 2008
    #3
  4. aznboi3644

    aznboi3644 Full Member

    more port area means a higher peak...the port is basically a resonating air mass...the more there is the more air is excited.
     
    aznboi3644, Oct 5, 2008
    #4