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How much THD (Total Harmonic Distortion) % is acceptable?

Discussion in 'Subwoofers' started by The-One, Feb 23, 2009.

  1. The-One

    The-One Member

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    <10% THD <50hz is considered good usually I think? But what is acceptable? What is bad etc etc? And is 1% THD a lot better than 9% THD?
  2. paulst10

    paulst10 Active Member

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    Basically the lower THD across the entire frequency range the better :)

    I would consider 10%THD @ 50hz quite poor (depending on how many DB's it was producing).

    A reasonable THD figure (depending on subwoofer) would be something like 100db @ 30hz with 10%THD

    An exceptional THD figure would be something like 100db @ 20hz with 8%THD :eek:
  3. cribeiro

    cribeiro Active Member

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  4. paulst10

    paulst10 Active Member

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    Last edited: Feb 23, 2009
  5. The-One

    The-One Member

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    So would say a 5% reduction in THD at 30hz from 9% to 4% say at 100db make a lot of improvement?

    Or because the THD is <10% this reduction does not matter
  6. paulst10

    paulst10 Active Member

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    IIRC, the audible threshold is around 10% so anything less than probably wouldn't be audible ? :)

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