What's a pre-out on a receiver?

Discussion in 'Archived Threads 2001-2004' started by Don Black, Feb 5, 2002.

  1. Don Black

    Don Black Screenwriter

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    I just read that the bedroom receiver I just bought doesn't have a pre-out. What does that mean and why is is bad? Thanks!
     
  2. Jon Torres

    Jon Torres Second Unit

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    i think it just means you can't add on an external amp to power your speakers.
     
  3. NickSo

    NickSo Producer

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    Yeah, sometimes you may want to upgrade your system in the future, and say add a better amplifire than the one currently in your reciever... Without a pre-out, you would not be able to do that...
     
  4. Colin Dunn

    Colin Dunn Supporting Actor

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    A pre-out jack is used to connect an external power amplifier to the receiver, rather than using the built-in amps of the receiver.

    It is different than a line-level jack in that the receiver's pre-amp functions are applied to the signal (things like volume, bass/treble/EQ, etc.). Ordinarily, the line-level output jacks (like tape monitor out) don't do any processing to the signal, just passing it through directly.

    I think the signal level of a pre-out jack is higher than line-level, so as to drive the power amp sufficiently.
     
  5. Don Black

    Don Black Screenwriter

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    Ah... Thanks guys. I'm not at the "separate" stage yet so it looks like I'm safe.
     
  6. Seth Paxton

    Seth Paxton Lead Actor

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    I think one use of pre-outs people were doing was using the pre-outs of the rear L/R going to a 2nd Pro-Logic receiver to dematrix the rear stereo on a DD EX signal and create the rear center from the L/R.

    Rather clever if you upgraded and still have that old receiver around.
     
  7. MichaelGomez

    MichaelGomez Stunt Coordinator

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    I have a question about that. I have a Sony str-DA555ES receiver that has pre-outs. How do I use this to get more than the standard 5.1 and DTS? Any thorough explaination would be grately appreciated.

    Mike
     
  8. Rob Dawn

    Rob Dawn Stunt Coordinator

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    Michael,

    Run cables from the Left & Right surround pre-outs on your Sony to the main inputs on a Dolby Pro-Logic receiver.

    Then run your Left, Right & Center Surround speakers off the Dolby Pro-Logic receiver (instead of the Sony) and, voila, you have 6.1!

    Remember that you won't have DTS-ES (a discrete 6.1 format) with this set-up though. What you'll be able to do is decode the soundtracks that have a surround back channel matrixed in to the left & right rear surrounds. (Like The Phantom Menace, if I'm not mistaken.)

    Rob
     
  9. Seth Paxton

    Seth Paxton Lead Actor

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    Yeah, DD EX is matrixed, but DTS ES is not.

    And of course matching volume levels can get trickier with this too.
     

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