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64ohm speakers

Discussion in 'Electronic Basics' started by phil, Apr 21, 2004.

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  1. phil

    phil Guest

    What is the advantage of 64 ohm speakers over the more traditional
    8 ohm speakers. Do we need higher voltages to operate them, as
    power = V^2/R

  2. JeffM

    JeffM Guest

  3. They need higher voltage but lower current for a given power output.
    If you want to drive a speaker from an opamp output, a 64 ohm speaker
    is a much better match to the available voltage and current than an 8
    ohm one.
  4. phil

    phil Guest

    Do you mean some sort of power opamp. Normal opamps give about
    10mA, which will not be enough even for a minature 64ohm speaker, I
  5. If you hold it to your ear, (as in a cell phone) you might be
    surprised at how loud it is. It won't replace your stereo.
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