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Decide between two new stereo amplifiers

  1. Nov 18, 2008 #1
    1. The problem statement, all variables and given/known data

    You are trying to decide between two new stereo amplifiers. One is rated at 130 W per channel and the other is rated at 200 W per channel.
    In terms of dB, how much louder will the more powerful amplifier be when both are producing sound at their maximum levels?

    2. Relevant equations

    dB = 10 log (I/Io)

    3. The attempt at a solution

    I was not sure If i can use the 130 W and 200 W as intensities....
  2. jcsd
  3. Nov 18, 2008 #2
    Re: amplifier

    Power is proportional to the intensity so yes.
  4. Nov 18, 2008 #3
    Re: amplifier

    so the solution is :

    dB = 10 log (130/200) ???
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