amp question

Discussion in 'Archived Threads 2001-2004' started by Matt Weldy, Apr 25, 2002.

  1. Matt Weldy

    Matt Weldy Second Unit

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    was is the difference in pre amp and a seperate amp. I know this is basic. But I have always used what was in my receiver to drive speakers. And now I am thinking about a higher end receiver and some need amps to run the extra speaker channels and I am a little fuzzy on this whole seperate deal.
     
  2. RobertCharlotte

    RobertCharlotte Supporting Actor

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  3. Bill_Weinreich

    Bill_Weinreich Second Unit

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    Hey Matt.

    A preamp is basically a low power amp use to bump a signal from a different source so that it can be used by the processor. It isnt in itself powerfull enough to drive loudspeakers. Thats where the power amp comes in. Its higher power is what is needed to push those cones.

    If you are looking for a newer reciever, most wont require you to add amps to run the 5.1,6.1 etc. Unless of course thats what your looking for. Then you might lean towards the pre/pro set up. There you have your sources run into the preamp/processor than those output run to the seperate amps. A bit more $$$$ though.

    Bill
     
  4. Wayne A. Pflughaupt

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    Matt,

    Bill is on the right track with his description of a pre amp, but there is much more.

    Any system has a pre amp and amplifiers. In a receiver both are housed in the same chassis. With separates, the pre amp is in one chassis and the amplifiers in another.

    The pre amp is the control center of any system. Connections for all components are made to the pre amp (or pre amp section of a receiver). It is the pre amp that selects what signals go to the video monitor and power amplifiers. Although it theoretically can be handled outboard, Dolby Digital processing and D/A conversions are typically handled by the pre amp. The pre amp also includes any basic equalization functions, like bass and treble controls. The L/R balance is controlled by the pre amp, as are the other respective speaker levels.

    The last thing “in line” in the pre-amp is the volume control, which sends whatever selections, processing, EQ etc. that has been performed upstream on to the amplifiers

    Regards,

    Wayne A. Pflughaupt
     
  5. Ted Lee

    Ted Lee Lead Actor

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    i always thought the pre-amp was "passive" with no amplification of any sort??? [​IMG]
     
  6. Vince Maskeeper

    Vince Maskeeper Lead Actor

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  7. Ted Lee

    Ted Lee Lead Actor

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    thanks vince! never really thought of a pre-amp in that way, but i suppose it makes sense.
     

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