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Speaker cable positve or negative?

Discussion in 'Amp Central Station' started by Iceman0124, May 4, 2017.

  1. Iceman0124

    Iceman0124 Tele-Meister

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    I've got a 1/4" jack to spade lug cable, going to use it to hook an attenuator into my Swart STR Trem. I'm thinking the printed side is positive? Reassurances appreciated!!

    20170504_023200.jpg
     
  2. ScottJPatrick

    ScottJPatrick Friend of Leo's

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    open the jack and have a look, positive will be attached to the tip.
     
  3. Iceman0124

    Iceman0124 Tele-Meister

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    Its a flat right angle plug, not a screw on.
     
  4. Tremade

    Tremade Tele-Holic

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    As long as it's only one speaker and one amp, + and - doesn't matter from amp output to speaker.

    If it's more than one speaker or more than one amp in your rig, + and - matters in the way of keeping speakers in phase and avoiding phase cancellation.
     
    Last edited: May 4, 2017
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  5. Iceman0124

    Iceman0124 Tele-Meister

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    1X12 speaker, and a Swart night light JR attenuator
     
  6. dimitris

    dimitris TDPRI Member

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    If you have a multimeter,you can check for continuity between the tip of the jack and each of the two spade lugs.
     
  7. uriah1

    uriah1 Telefied Gold Supporter

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    Also, other than printed, you will notice that split wire like that
    will have one that has a raised rail alongside. Usually the
    grooved or ribbed side is hot in many elec applications.
     
  8. LooseJack

    LooseJack Tele-Meister

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    Get a cheap multimeter. It will come in handy.
     
  9. jimash

    jimash Friend of Leo's

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    OH. Someone taught me that the ribbed one was negative. Darn.
     
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  10. tap4154

    tap4154 Doctor of Teleocity Ad Free Member

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    Actually in AC the ribbed side is neutral. I'm pretty sure in DC the printed side is hot, but a DMM continuity test to the jack tip as someone suggested will confirm.
     
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  11. W.L.Weller

    W.L.Weller Tele-Holic

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    This post is 100% correct.

    The difference between connecting one speaker -+ and +- is which direction the cone moves on which part of the signal's waveform (which is why wiring 2 speakers "out of phase" sounds so bad & quiet, one cone is moving in while the other moves out). You can check this yourself by playing through the amp, turning it off, swapping the spade connections, turning it back on and playing through it again (don't disconnect speakers from a tube amp while it's on, it creates the possibility of a real big repair bill). This is but one of the simple, empirical ways to understand how absurd "directional" speaker cable is.
     
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  12. kennl

    kennl Tele-Afflicted

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    i use a multimeter to confirm that I connect cable + (tip) to the speaker +. Then I check the phase with the "match" test. Light a match and hold it in front of the speaker and apply a signal. If the match flame flickers AWAY from the speaker, I'm done. If the flame draws in toward the speaker, I'll reverse the connection.
     
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