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Active Filter to Amplifier TDA2030

Discussion in 'Electronic Design' started by [email protected], Apr 7, 2007.

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  1. Guest

    Hello people,

    I made one filter board for low pass, band pass and high pass, it
    wooks well. Then i made one amplifier circuit with TDA2030 for
    subwoofer, midrange and tweeter. For midrange and tweeter i use one IC
    TDA2030, but for subwoofer i use two TDA2030, The board wooks well
    also. I connect two boards together, i can not receive good signal
    from output of amplifier board. When i connect the every output of
    filter board to low input of amplifier, the output of amplifier is
    distortion, but i connect the every output of filter to mid and high
    input of amplifier i can recieve good signal from output. one more
    thing, i connect mid and high output of filter board to amplifier at
    the same time, the output of amplifier is distortion.

    Do anybody know what i am wrong?

    Thank you.
     
  2. On 6 Apr 2007 22:47:49 -0700, in sci.electronics.design
    How are you connecting the two tda2030s together for the subwoofer

    If you post your circuit on a photo site, it would be helpful (for
    example flckr)


    martin
     
  3. Chauny

    Chauny Guest

    Thank for your reply, i follow figure17 page 6 of datasheet tda2030
    http://www.ortodoxism.ro/datasheets/stmicroelectronics/1458.pdf

    I connect midrandge output of filter to input of amplifier, the
    midrange ouput of amplifier is good. i let it, then i connect high
    output of filter to input of amplifier more, the good midrange output
    change, it becomes bad. i use 4 tda2030 IC amplifier board:eek:ne for
    high, one for midrange and 2 for subwoofer. Do you know the reason
    why?
    Thank you!
     
  4. If the power amps are on the same supply, especially the ground
    path becomes critical as high currents may go through the ground
    of the low level inputs.
    In your language: 'connect the other amplifier way the lead powers'.

    :)
     
  5. Jamie

    Jamie Guest

    If I understand your statement here? I guess my question is,
    how are you joining the 2 TDA2030 for the Sub woofer? You do know
    they need to be 180 degree's out of phase if you're doing bridged mode
    output. Any other way, isn't going to work.
     
  6. Jamie

    Jamie Guest

    I'm looking at that PDF. It shows using a +&- supply for the bridge
    version. Are you using this or a single supply ?
     
  7. ehsjr

    ehsjr Guest

  8. R22,R7 attenuates the o/p of the LH TDA2030 into the inverting input
    of the RH device. I would have taken the LHS of R5 to the signal
    input C1


    martin
     
  9. ehsjr

    ehsjr Guest

    Thanks, Martin. I missed that.

    Ed
     
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