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Average Audio Power.

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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.

Parents
  • 0

    Audio output figures are at best an advertising claim and at worse an outright lie.

    I have seen a rack of audio amplifiers in a nightclub with a claimed total output of over 12,000 watts. The lot was on  one 15 amp fuse, which had never blown.

    Have also seen car audio systems with a claimed output of over a kw, connected to the 12 volt battery via a 30 amp fuse.

    The only accurate way to measure the output power is with an audio watt meter. An approximation may be made by measuring the mains INPUT power with a plug in energy meter and assuming an efficiency of 50 %

  • 0 in reply to broadgage

    I have found that many amplifiers do not provide the correct R.M.S. output as stated. This is also the case with loudspeaker ratings. So loudspeakers could be damaged if actually powered up to the rating on the box/plate.

    www.youtube.com/watch

    Z.

Reply
  • 0 in reply to broadgage

    I have found that many amplifiers do not provide the correct R.M.S. output as stated. This is also the case with loudspeaker ratings. So loudspeakers could be damaged if actually powered up to the rating on the box/plate.

    www.youtube.com/watch

    Z.

Children

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