Anyone used a riser as sub enclosure?

Discussion in 'Archived Threads 2001-2004' started by Dave Milne, Nov 8, 2001.

  1. Dave Milne

    Dave Milne Supporting Actor

    Jul 2, 2001
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    I'm thinking of building a sturdy riser for my second row of theater seats and using it as a sub. I would imagine that 1" MDF, thoroughly braced, will be structurally fine for this 300-liter enclosure (approx. 60"x50"x6" internal). But will the long, flat box cause any resonance or tuning problems??
  2. Dave Poehlman

    Dave Poehlman Producer

    Mar 8, 2000
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    I wouldn't think it would be a problem, as long as it is heavily braced. Wide spans of MDF, even at 1" thick, can vibrate.
    As far as resonance goes, 60" is about the wavelength of 180Hz. So, as long as you cross over lower than that, you should be fine... besides, with all that bracing, you would be breaking up the space.
    Sounds pretty cool.
  3. brentl

    brentl Cinematographer

    May 7, 1999
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    GREAT idea Dave, but which way were planning o firing the driver??
    I'd guess you riser wouldn't be 15" high??? or would it??
    Mind you you'd need a 6" depth any way you look at it.
    Brent L
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