sonotube noise help

Discussion in 'Archived Threads 2001-2004' started by David_Lew, Jul 9, 2002.

  1. David_Lew

    David_Lew Stunt Coordinator

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    Under high volumes and low bass, I notice my tube is making noises. I was wondering what this could be. I usually don't turn it loud enough to have this happen but when I do, it's quite annoying.
     
  2. Frank Kanyak

    Frank Kanyak Stunt Coordinator

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    It is possible that your maxing out the sub's excursion limit. Mine bottoms out at high volumes on Episode I pod race scene.
     
  3. Dave Poehlman

    Dave Poehlman Producer

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    What kind of noise is it? Where is it coming from?
     
  4. David_Lew

    David_Lew Stunt Coordinator

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    Coming from the sonotube, not sure exactly where.
    It's hard to describe, if I'm playing something with low bass, it's fine until I keep upping the volume and then it makes some noises so I let off until they're gone.
     
  5. Andrew Pratt

    Andrew Pratt Producer

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    It could be any number of things from the noise from the ports or the driver bottoming out or even the tube itself leaking air if its not sealed properly.
     
  6. Alexis

    Alexis Stunt Coordinator

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    It's your sonotube ringing. You need to dampen the walls more. You can wrap it with dynamat or the equivalent. I find sealed sonotube designs have more of a problem with this.

    SVS laminates their tubes to reduce this.
     
  7. ThomasW

    ThomasW Cinematographer

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    Andrew's got the right idea.

    Check for EVERYTHING for air leaks... Use the smoke from a cigarette while the sub is playing. The air leak will deflect the smoke.

    BTW it's not the tube itself ringing. Sonotube has a resonant frequency that's out of the passband where the sub is operating.
     
  8. David_Lew

    David_Lew Stunt Coordinator

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    Ok I tested it again just now. It seems it's too light.
    If I sit on it (190lbs), there's no more noises. When I look at it, the whole tube is moving. O boy, it kicks hard too [​IMG]
    I found my new message chair
     

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