Sub building materials

Discussion in 'Home Theater Projects' started by Dean-P, Sep 2, 2003.

  1. Dean-P

    Dean-P Stunt Coordinator

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    I was assuming that mdf was the only product really to be used until I read the tempest "Adire" building sheets and it stated "building materials are void free plywood (such as marine ply, apple ply, or baltic birch)and MDF".
    Does this mean I can use veneered plywood such as oak, regular birch with a plywood core?[​IMG]
     
  2. Bob Kavanaugh

    Bob Kavanaugh Second Unit

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    Yes, many people choose to use MDF because it is heavier ( ~80lbs a sheet), cheaper (less than half the cost of veneered plywood), and can accept a variety of finishes. Some even feel it has "special dampening qualities".

    Knock yourself out, but I have to ask, what are your plans?
     
  3. AllanRW

    AllanRW Second Unit

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    Talk to Dan at Adire .
    He is liking Plywood much better over MDF.
    Go veneered Plywood 3/4" and you will be fine.

    Al
     
  4. Allen Ross

    Allen Ross Supporting Actor

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    I recently build an audio rack and pi speakers out of Baltic Bitch and loved the way they came out. it can take a really nice finish and you don't have to worry about veneer and such.
     
  5. Hank Frankenberg

    Hank Frankenberg Cinematographer

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    MDF tends to "dampen" higher frequencies. That's why it's best for full-range speakers. At sub frequencies, it doesn't do any better than plywood. Note that we're talking solid core plywood, like Baltic Birch or Appleply. Regular plywood has several internal voids. A benefit to using the solid core plywood is that you'll actually be able to lift your sub.
     
  6. Dean-P

    Dean-P Stunt Coordinator

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    Thanks for the replies; I'm going to use 3/4" mdf covered in 1/8" oak ply...trying to match my Athena Audition series. I'll try to post pics when I'm done.
    BTW Bob K I'm building a 85l Shiva sealed unit.
     
  7. Jonny K

    Jonny K Second Unit

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    Hmmmm...sounds heavy. (literally).

    My Tempest uses the Adire Alignment and it's made mostly from MDF (with some plywood for the inner supports). The thing is so heavy that I can't safely carry it on my own (or risk hurting my back trying).


    Jonny K. [​IMG]
     
  8. David Giesbrecht

    David Giesbrecht Second Unit

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  9. Allen Ross

    Allen Ross Supporting Actor

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    casters thats all i have to say, with the hardware out of my tempest i could move it, barley, even up stairs [​IMG] its around 100-110 lbs w/o driver and amp so 150-175 all together. But now she is mobile with 2/5" casters from HD she rolls with the flow and when locked down she doesn't budge and inch
     
  10. Dave Milne

    Dave Milne Supporting Actor

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    Edit: Never mind. Inappropriate out-of-context quote from Allen Ross' post.
     
  11. TimForman

    TimForman Supporting Actor

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  12. Jake K

    Jake K Stunt Coordinator

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    About how much do the different types of plywood cost compared to MDF?
     
  13. Jonny K

    Jonny K Second Unit

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    Plywood is more expensive, but much lighter. I just can't give you any exact prices.


    Jonny K.
     
  14. Dean-P

    Dean-P Stunt Coordinator

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    I called today for the 3/4" mdf, it runs about $22/sheet and the 1/8" oak plywood costs $30/sheet. I'll be able to cover my sub and my A/V-3s and still have leftovers.[​IMG]
    3/4" oak plywood(regular core)costs about $55...
    (all prices are in canadian $)
     
  15. Bob Kavanaugh

    Bob Kavanaugh Second Unit

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    Here in GA , 4x8 3/4 MDF runs ~$18 and oak or birch 3/4 ply is ~$40 a sheet.

    I keep meaning to call the lumber yard(s) to get prices, to compare them to Lowes / Home Depot
     
  16. Wayne Ernst

    Wayne Ernst Cinematographer

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