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  • Speaker outs explanation.

    I have a small mono pa head that I have used on and of for practice and stuff (not really big enough for full PA work). The outputs are hi fi style screw terminals.

    I am not sure what all of the terminals do however - they are labeled as follows

    8ohm (points to 2 terminals - the ones I use)
    com
    70
    100

    There are also a few unlabeled terminals in the same strip which I assume are unused.

  • #2
    Wow, almost a year with no replies....

    (Sorry, going through old posts).

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    • #3
      I'll wager that one of the 8-ohm terminals is jumpered to the "com" (common) terminal.

      70 and com will push a 70-volt distributed system. Each speaker on such a system requires a 70-volt transformer.

      100 and com is the same as above, b/w 100-volt transformers.

      The benefit of distributed systems is you can use a lot of speakers without worrying about impedance issues. Many of the multiple ceiling-speaker systems you see installed in restaurants and banquet halls are 70- or 100-volt.

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      • #4
        Originally posted by moody
        I have a small mono pa head that I have used on and of for practice and stuff (not really big enough for full PA work). The outputs are hi fi style screw terminals.

        I am not sure what all of the terminals do however - they are labeled as follows

        8ohm (points to 2 terminals - the ones I use)
        com
        70
        100

        There are also a few unlabeled terminals in the same strip which I assume are unused.
        Isn't common the ground,or negative and then the two that are marked 8 ohm,the positives?
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        • #5
          Originally posted by tlbonehead
          Isn't common the ground,or negative and then the two that are marked 8 ohm,the positives?


          Maybe it's supposed to... but I screw speaker lead to the two 8ohm terminals and get sound.....

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