Amplification basics

Discussion in 'Archived Threads 2001-2004' started by Rock M, Jan 23, 2002.

  1. Rock M

    Rock M Auditioning

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    Couple of questions on amplification.

    1)Is amplification additive? If one wired the speaker outputs (not preamp RCA outs) to an amplifier, how would the amplification be calculated. Ex, receiver outputs 80wpc (all channels driven) into an amp the outputs 100wpc. Is this connection even possible? If so, what is the result?

    2)If one had an audio source, something that just had speaker outputs (no preamp outputs). Can you hookup a car stereo amp to get more power. Maybe I should ask the difference between home audio amp (like that sub amp at PartsExpress) and those car stereo plate amps.

    Thanks in advance,

    Rock
     
  2. Cees Alons

    Cees Alons Moderator
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    Cees Alons
    Rock,

    No you cannot multiply amplification by putting amps in series.

    Each amp can only output its max power.

    The input of an amp is mainly voltage determined, it won't suck much current from the previous stage. And in fact, a power amp does not amplify the voltage that much, it only has the "power" to maintain that voltage even if a high current has to be delivered (power = voltage times current).

    This partly answers your second question too. No, it cannot be done.

    The main difference between a "home" amplifier and a car amplifier is the ac/dc voltage it takes to work. Car amplifiers usually need 12-14V dc, while "home" amplifiers have circuits to enable it to work from 110V ac (if you live in the States).

    Cees
     
  3. Vince Maskeeper

    Vince Maskeeper Producer

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  4. Rock M

    Rock M Auditioning

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    Thanks for the info I appreciate it.

    Rock
     

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