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Can someone explain to me what a Rumble Filter / Bass Boost does to a woofer?

Discussion in 'Home Theater Projects' started by AhsanR, Oct 19, 2006.

  1. AhsanR

    AhsanR Well-Known Member

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    I was wondering if someone could please explain to me in layman's terms what a rumble filter at 35hz and 28hz would do to a subwoofer.

    Would this be less than ideal for home theater applications where the main goal is to replay things with deep bass below 20hz?
     
  2. Owen Bartley

    Owen Bartley Well-Known Member

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    I'm no expert, but I'd think a rumble filter at 28 or 35Hz would be pretty counterproductive in a subwoofer application. Generally, they are applied (I think) to protect the driver from overexcursion at the very low frequencies, and are basically a bit of equalization built in to roll off response below the selected point.

    A rumble filter at 35Hz would start to rob you of a lot of good usable output.

    A bass boost is pretty much the opposite, a built in boost in EQ applied to the selected frequency. I would think it would make more sense to see a bass boost at 28 or 35Hz, and a rumble filter kick in somewhere below 20Hz, depending on the driver you're using.

    It might help if you mention what amp & driver you're thinking about using, maybe someone will be familiar with it.
     
  3. AhsanR

    AhsanR Well-Known Member

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    I'm gonna go buy either a bash amp from Oaudio (they have a variable eq), or the behringer at Parts Express. Your suggestions?
     
  4. Mattak

    Mattak Well-Known Member

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    Which behringer? A europower? They have filters but they're defeatable via dip switch.
     

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