Need some thoughts/adjustments (big)

Discussion in 'Archived Threads 2001-2004' started by Jedd, Mar 19, 2002.

  1. Jedd

    Jedd Second Unit

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    I'm trying to keep low profile and budget, to learn what to do and how to do.
    So I decided for small sealed shiva sonotube.
    - 12"x4' tube from home-depot ~ 89L cabinet (w/o driver and cap)
    - shiva driver - upfiring, to seal the tube from the top, and avoid legs mounting
    - couple sheets of 1/2" MDF to seal the rest
    - 75W power from the receiver
    - some tools to cut&glue
    So I downloaded the lspCAD and "designed" (just put tube and room size in) the cabinet.
    Here what I got:
    [​IMG]
    [​IMG]
    [​IMG]
    Are those numbers look good or I'm missing something badly?
    What other parts should I order? (terminals, x-over)
    What should I stuff it with and how much of stuff do I need?
    Thanks
     
  2. ArmenK

    ArmenK Stunt Coordinator

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    how do you plan on keeping the driver in place at the end of the sonotube?
     
  3. jeff lam

    jeff lam Screenwriter

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    It will be top heavy with the driver mounted on top. It could fall over. Why not just use the down firing design and use legs?
     
  4. Jedd

    Jedd Second Unit

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    Hmm, maybe I'll balance it with an iron plate, so it wont trip over.

    The problem is how to mount 12" driver into the 12" tube. I hope 1/2" wooden circle-washer and 2 all-thread rods or 2 wooden sticks will be enough to support the weight of the driver. (although I never saw how Shiva looks like, so I might be completle wrong here)

    In downfiring design I have no idea how to keep the driver from falling and legs become an issue too. (I'll have to glue them on sides or something)
     
  5. Dustin B

    Dustin B Producer

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  6. jeff lam

    jeff lam Screenwriter

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    Just make a larger endcap, then mount the legs on the cap. With a 12" driver you are acually better off going with 14-16" sonotube.
     
  7. Jedd

    Jedd Second Unit

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    Jeff, somehow I thought about diving driver into the tube, instead of putting it out on the cap, thanks. (feel a bit stupid :b )

    Of course I'd like to get 16" tube and put Tempes inside, but the problem is that everything >12" costs > $100, 12" is just a $7

    Dustin, it was the firt document I've read. Shiva needs only 11" hole to fit in, that's why I hope to do it with a 12" tube.

    What do you think about graphs, are they any good or I should work on them more?
     
  8. Patrick Sun

    Patrick Sun Moderator
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    So basically you have a 1" wide ring of MDF 12" in outer diameter. That's not a lot of margin for the screw hole integrity for each screw hole. I hope you hammer in a lot of nails around the perimeter, and glue/caulk the hell out of it.

    Otherwise, you're ok.
     
  9. TedO

    TedO Stunt Coordinator

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    Jedd,

    I called around and found a 20" dia x 6' Sono tube for $30. You just have to shop. I found the price at a masonary supply store, I just looked in the yellow pages under concrete supply and started calling. The most exspensive piece I found was over $7 a foot.

    I have been amp shopping also, I found a 3 month old QSC RMX2450 and the guy is going to sell it to me for $425.

    If you want to save money put in the time and shop, the deals are out there.

    TedO
     
  10. Jedd

    Jedd Second Unit

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