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  1. #1
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    Which THD is better and considered low

    Hello

    Can anyone tell me which thd is good -60 dB OR -90 dB. because I have read in papers that the THD is given as negative like -52 dB THD but the comparision is given in positive like 52dB. We need low THD so is -50 dB a low THD or -60dB a low THD?

    Thanx

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  2. #2
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    Re: Which THD is better and considered low

    Hi!

    I start by saying I am not skilful with this matter but, I found this on the web:http://www.sengpielaudio.com/calculator-thd.htm
    Making some test, I see that lower are the dBs, lower is the distortion.

    So i think that -90dB is better than -60dB.

    Do not absume my words as truth, but like an hypothesis.


    Byeee!



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  3. #3
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    Re: Which THD is better and considered low

    -60dB is 0.1%. -90dB is 0.003%. Few people can hear 0.1% distortion in music but a sinewave sounds a little like a buzzer. Nobody can hear 0.01% or less.
    At fairly low frequencies an OPA134 audio opamp has 0.00008% distortion. A TL071 audio opamp has 0.03% distortion. A 741 or LM358 ordinary old opamp has about about 3% distortion.



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