Balanced (XLR) connections

Discussion in 'AV Receivers' started by James Slade, Nov 30, 2003.

  1. James Slade

    James Slade Second Unit

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    Why do some preamps have balanced outs but not ins? Is there a gain from going balanced from preamp on? What not go balanced all the way from the source?
     
  2. Ernest Yee

    Ernest Yee Supporting Actor

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    I think the prime benefit to XLR connections is that they maintain a clean signal for longer distances - so you would have the preamp outs as XLRs for long runs say to separate monoblocks. All your transports and misc sources will usually be fairly close to the preamp so I think the thinking is that the gain from that would be limited.
     
  3. Wayne A. Pflughaupt

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    Not to mention, components with balanced outs are few and far between, most of them originating in pro-audio.

    Regards,
    Wayne A. Pflughaupt
     
  4. Robert AG

    Robert AG Stunt Coordinator

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    If you do not have to use balanced connections, you are better off not to do so. Balancing requires double the amount of active electronics at the sending and receiving end of the cable, and this can be a source of degration that is better avoided if possible.

    BTW: Almost no equipment is truly "balanced" anymore, the exception being that that actually uses isolation transformers at the sending and receiving end. Equipment that is balanced and does not use transformers is called "electronically balanced", and it does have some drawbacks in comparison to real transformer balancing. In electronic balancing, there are still potential paths to ground through the active electronics in the equipment, and there is no real isolation between components.
     

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