a POWER METER for a 2x22 WATT AUDIO AMPLIFIER

Discussion in 'The Projects Forum' started by kaname08, Sep 23, 2010.

  1. kaname08

    Thread Starter Member

    Sep 22, 2010
    37
    0
    i am just new here and hope you could help me,pls,,,

    i am a 2nd year BSECE student,,,,,

    i have a project,a power meter connected to the 2x22 watt audio amplifier,, last week i had already able to test it and it worked,but then just this tuesday,the power meter did not emittesd a light,however the amplifier still works(still produces the needed sound),,

    this is where the diagrams for the two is:

    http://freecircuitdiagram.com/2008/09/13/audio-power-meter-show-audio-amplifier-actual-output-power/

    and

    http://www.circuitstoday.com/tag/2-x-22-watt-stereo-amplifier-using-ic-tda-1554

    pls do help pls,,
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
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  3. retched

    AAC Fanatic!

    Dec 5, 2009
    5,201
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    If this is battery operated, have you checked that the battery power did not drop to an UN-usable level?
     
  4. kaname08

    Thread Starter Member

    Sep 22, 2010
    37
    0
    oops i'm sorry about now i understand ,in opening a new project i need to make a new thread,thank you,,

    i am using a power supply for that,12V,,
     
  5. Audioguru

    New Member

    Dec 20, 2007
    9,411
    896
    The datasheet for the TDA1554 shows that its output power for each bridged channel is only 8.4W into 4 ohms at clipping (low distortion) or 5W into 8 ohms.

    Its output power is 22 Whats per bridged channel into 4 ohms when the supply is 14.4V and the input level is much too high so the amplifier is clipping badly and making a horrible-sounding 10% distortion. At clipping it is 17 watts.
     
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