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My new box, how will it do?

Discussion in 'Subwoofer Box and Custom Fabrication' started by Fbmowner, Jun 4, 2011.

  1. Fbmowner

    Fbmowner Full Member

    Okay next weekend is my shot at a new box since im waiting for new components in the mail. Ill start by saying this box has a total of 10.97cu ft. to accommodate braces/basket displacement/port etcc..With a final Vb of 9.31cu ft. This sucker is pretty big and ive designed it around my subwoofer specs which im also posting in this thread. Id just like some feedback on how it seems and if ive made some horrible error id like someone to yell at me before i go and pick up a bunch of mdf lol.. Ill post the box first, then below that ill have the woofer specs and box specs.

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    I have the 12 DVQ
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    Last edited: Jun 5, 2011
    Fbmowner, Jun 4, 2011
    #1
  2. Ranger SVO

    Ranger SVO Full Member

    For some reason I cannot open your pictures, I'll fire up my other computer tomorrow. But 9 to 10 cu ft, thats pretty big. Tell me more about your speakers. I believe that your wanting to run 3 12-inch woofers, right? What brand?

    Tell me more, box size, port size, tuning
     
    Ranger SVO, Jun 4, 2011
    #2
  3. Fbmowner

    Fbmowner Full Member

    Hey ranger, all the specs are in the pictures =(, Yes ill be running 3 12" woofers. 3 Infinity Kappa Perfect 12dvq.. Also the woofer spec sheet is included in the pictures to! A short description tho, the outer dimensions are 21.5" Tall x 41" wide x 25.5" with an 8" round port 7.3" long, which is tuned to 32hz (if ive done it all correctly) Port facing the trunk and woofers firing upwards.
     
    Fbmowner, Jun 4, 2011
    #3
  4. Ranger SVO

    Ranger SVO Full Member

    Port size is good, but you might wanna consider making that box just a little smaller. Max recommended size for that woofer is 3 cu ft. For three woofers thats 9 cu ft. Your box is around 10.75 cu ft (I'm rounding), your port only takes up around .25 cu ft.

    Its been my experience that Infinity Woofers don't handle abuse well. For that reason I would consider staying in between the recommended enclosure size.

    Personally, I like your box size and tuning
     
    Ranger SVO, Jun 4, 2011
    #4
  5. Fbmowner

    Fbmowner Full Member

    Your rite, although after bracing and basket displacement ill have 9.31 cu ft but i guess i should still make it a little smaller to drop it to 9 cu ft. In my pictures youll see the total cu ft is 10.97 (empty), and 9.31cu ft with all the bracing and woofers, for some reason i didnt think the cu ft (with bracing) included the basket displacement. Must be the allergy medicine im on! Ive had these woffers for about 3 years and beat them up in sealed box with about 1300watts rms between the 3, almost every day since ive had them. I think if i build a nice big box and murder em, itll be a good way out!
     
    Last edited: Jun 5, 2011
    Fbmowner, Jun 5, 2011
    #5
  6. TheViking

    TheViking Well-Known Member

    I am with Ranger on this, reduce your box volume to the upper end of the drivers recomendations... Generally speaking a driver in too large of a box is not a happy driver...although low end extension can be awesome in the right enviorment..But displacemnt limited power handling suffers greatly...
     
    TheViking, Jun 5, 2011
    #6
  7. Fbmowner

    Fbmowner Full Member

    If i knock off a half inch from the width it brings me to 9.03cu ft with all bracing and woofers in =D
     
    Fbmowner, Jun 5, 2011
    #7
  8. Ranger SVO

    Ranger SVO Full Member

    I think both you and your speakers will be much happier.
     
    Ranger SVO, Jun 8, 2011
    #8
  9. Fbmowner

    Fbmowner Full Member

    This pleases me =D, now i just need to get this moving so i stop messing with the bracing lol..Everyday i think of new ways to do the bracing ! This is my latest idea of it.. Obviously the braces that go to the side walls will be lowered to the center of the front and back of the box.
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    Fbmowner, Jun 8, 2011
    #9
  10. deadz67

    deadz67 Full Member

    do you need that much bracing if you go a heavier mdf? btw love the schematics, great pogram & nice work!
     
    deadz67, Jun 18, 2011
    #10
  11. tbhenclosures

    tbhenclosures Member

    What Q values did you enter during design? They are pretty high VAS woofers and can be high Q as well.. for the design you posted I believe the low Q option would be best fitting for most peoples listening preferences for a ported enclosure.
     
    tbhenclosures, Aug 4, 2011
    #11