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mosfet audio quality

Discussion in 'Electronic Basics' started by [email protected], Jul 10, 2008.

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  1. Guest

    How does this IRF530-based circuit compare with, say, an LM3886?

    I thought this would make a good first project, but if it doesn't
    sound so great, then why bother...?

    Anyone have experience with this circuit?


  2. Eeyore

    Eeyore Guest

    I have extensive experience with audio mosfets including a design that
    was capable of 0.0008% THD @ 1 kHz @ 350W (almost the limit of AP test
    equipment). The unit's final THD was actually limited by some op-amp
    stages, although more modern op-amps would fix that.

    The IR circuit is in comparison complete rubbish and very basic,
    although it teaches the basic fundamentals.

    Isn't the LM3886 one of National's 'Overture' ? series used in the
    'gainclone' type kits ? It's very well regarded. I know someone who just
    built one and has nothing but praise for it.

  3. Guest

    Sounds good. I read bits and pieces of Slone's book online
    (, and requested a similar book from the library (it
    should be arriving soon, from a different library branch).


  4. neon


    Oct 21, 2006
    TDH nice buzz word in reality human hear can only hear a 3% tdh in reality you are lucky to hear 15kc 10kc is stretching it i hear 6kc and no more so what do i care about 100kc audio bandwith it is a selling bs.
  5. Eeyore

    Eeyore Guest

    Well it's little worse that Hitachi's early app notes ! Except that Hitachi
    gave vastly more support info.

    Google 'gainclone' but ignore all the audiophool voodoo shit. Concentrate on
    the engineering aspects of it, They're basically decent IC amplifiers.

    The Nat Semi data is free online of course.

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