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Average Audio Power.

Evenin' all,

how can I easily practically determine the average power being delivered by an audio amplifier into a loudspeaker of declared impedance? Some audio amplifiers can not deliver the power that they claim.

Thanks.

Z.

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  • most cannot deliver their rated power for much more than the crests of the wave when the drums go bang for a few milliseconds every few seconds, and if they did, you'd find to your disappointment the speaker ratings are very much the same, and do not represent anything like a safe steady state power input, more a transient that can be briefly survived. Steady state rating would be about 10% of nameplate figure if you are lucky.

    What exactly do you need to know for ? - also realise that it is not a single figure but is very frequency dependant, as is speaker impedance.

    The only sure fire way is to capture voltage and current waveforms and multiply them.

    Mike.

  • I am involved with sound equipment at present. I am using very good quality speakers such 12inch Eminence or Fane professional types.

     When designing a system  I need to know accurate figures to provide adequate sound volume and also to match equipment and prevent damage to speakers or overloading of amplifiers.

    Z.

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  • I am involved with sound equipment at present. I am using very good quality speakers such 12inch Eminence or Fane professional types.

     When designing a system  I need to know accurate figures to provide adequate sound volume and also to match equipment and prevent damage to speakers or overloading of amplifiers.

    Z.

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