building sub box?

Discussion in 'OT Technology' started by e r y k, May 22, 2005.

  1. e r y k

    e r y k New Member

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    hey guys

    summer just rolled around, and i need something to do...
    what else is better than rebuilding a sub box -_-

    i have most of the tools needed, however, i do not have a clue on how to cut a perfect circle? ive seen some tutorials where they used a jigsaw, but i dont think im that skilled. i dont have money for a router :(

    does anybody have any tips or experiences they would like to share :x:

    maybe some good sites with picture to picture guides?

    thanks a million
     
  2. P07r0457

    P07r0457 New Member

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    I've used a jigsaw, it was okay. But the best way, in my opinion, is a dremel with the circle-cutting attachement.
     
  3. Ronin

    Ronin Guest

    make sure the inside of the box is properly sealed, you can use spray on sound dampering type stuff for that, there may be a better way to seal the inside but until someone states so id go with the spray in sound dampering (liquid dampering material is what im referring to as opposed to a can)
     
  4. e r y k

    e r y k New Member

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    jollyogre - can you link me to this dremel gizmo? how can it cut through 3/4inch of mdf?!

    ronin - is using silicone not recommended? i know it gives off some stuff while its drying that may eat away at the surround... but once its dried it should be fine?
     
  5. e r y k

    e r y k New Member

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    i just saw the circle attachment... it only seems to go up to 48 cm, and i need 12 inches -.-

    nvm ignore me, im stupid. it goes up to around 18 inches.

    but i would have to get the special saw dremel !
     
  6. P07r0457

    P07r0457 New Member

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    it was included in my dremel kit (cordless lithium ion) which was around $60.

    As for sealing the box, I've always used Liquid Nails. If you leave enough time for it to dry, then you won't have to worry about your sub.
     
  7. johnson

    johnson New Member

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    An 11" cutout for a jig saw should be pretty simple if your blade is sharp. It doesnt have to be perfect because the sub will cover up the non roundess of the hole. Just make sure you dont cut it too big.
     
  8. Ronin

    Ronin Guest

    yes liquid nails should work, adhesives dont get much more powerful than that.
     
  9. e r y k

    e r y k New Member

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    would you guys recommend to use brackets for structural integrity? each of my subs need around 3cu ft... so ill have around 6 cu ft total..
     
  10. P07r0457

    P07r0457 New Member

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    if you're using 3/4" MDF/Birch, then you're okay.
     
  11. Ronin

    Ronin Guest

    up to you as far as brackets go, i think ud be fine but if ud feel better by using them then go ahead
     
  12. veonake

    veonake OnT poster, OT lurker

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    Router's are not that expensive. I mean, they can be, but they can be had for under $100 (assuming you were willing to shell that out for a dremel).
     
  13. e r y k

    e r y k New Member

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    hehe i found a friend with a dremel...

    does anybody know where i can pick up a circle cutting guide for the router to mount on?
     
  14. XR250rdr

    XR250rdr OT Supporter

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    :werd: Cheap router >> dremel

    Dremels are made for lightweight work not cutting 3/4" MDF. Do your friend a favor and get a jigsaw or a cheap router. A jigsaw is easier to freehand than a router at first. If you draw a line on the MDF and go slow you can get a pretty close to perfect circle with a jigsaw. A router + circle jig and you can even recess the driver into the baffle. :cool:

    A 3 cu ft box should be well braced; and not with metal corner brackets.
     
  15. e r y k

    e r y k New Member

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    well each sub is recommended for 3cu ft... should i divide the two chambers up? or have them together?
     
  16. XR250rdr

    XR250rdr OT Supporter

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    Run separate chambers. What subs are these anyway that they need 3 cu ft per driver?
     
  17. Bavarian3

    Bavarian3 OT Supporter

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    these were done with a plain old jigsaw, its quite easy just draw the circle out with a compass then take your time cutting the circle.

    [​IMG]
     
  18. Ronin

    Ronin Guest

    clean, and :cool:@ bmw
     
  19. XR250rdr

    XR250rdr OT Supporter

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    Nice job on those boxes :bigthumb:
     

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