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Port length

Discussion in 'Home Theater Projects' started by RandyMathis, Jan 17, 2005.

  1. RandyMathis

    RandyMathis Stunt Coordinator

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    Finally got some more time to get back to planning a sonosub with the Atlas 15.

    I am looking at internal dimensions of 22" diameter x 50" long (311.462 Liters or 11 cubic feet).

    Am I correct that I would need two 22" long x 6" diameter ports to tune this thing at 16hz?

    I can't wait until it warms up so that I can go outside and start cutting MDF. [​IMG]
     
  2. Patrick Sun

    Patrick Sun Studio Mogul

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    Do you need two 6" wide ports? Is port noise really loud with just one 6" wide port?
     
  3. Dustin B

    Dustin B Producer

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    A single 6" port will need to be just over 22" long. Dual 6" ports will need to each be almost 49" long.
     
  4. RandyMathis

    RandyMathis Stunt Coordinator

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    Thank You
     
  5. Yury

    Yury Auditioning

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    I'm absolutely agree with Patrick Sun. I got the same serios problem about port noise.

    but you can calculate port length:
    L=(2354*D^2/VF^2)-0.85D
    L - port length (mm)
    D -port diam (mm)
    V - box capacity (litres)
    F - tuning frequency (Hz)
     

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