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Directional Cables

Discussion in 'Plasma TVs' started by john R1, Dec 7, 2003.

  1. john R1

    john R1
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    Am running Ixos component cables from dvd to plasma with arrows pointing towards Plasma.

    Is this correct please?

    Cheers

    John
     
  2. cybersoga

    cybersoga
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  3. john R1

    john R1
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    Glad i changed them around then, considering they was installed about 18 months ago by one of the so called top 20 hifi dealers it makes you wonder,
     
  4. goliath23

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    I wonder why the direction on a component cable would matter?:confused:
     
  5. john R1

    john R1
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    can honestly say have not noticed any differance in pq
     
  6. TheBigApple

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    Which just goes to prove that directional cable is a marketing gimick. :devil: :laugh:
     
  7. Brogan

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    Surely not! :eek:
    I don't believe for one minute that businesses would attempt to screw the general public in this way...:rolleyes:

    I put my directional speaker cable on the wrong way once and the electrons just refused to traverse along the cable.
    Or maybe it's because it was oxygen free copper and they didn't want to suffocate?
    Long story short, there was a huge build up of power at the amp speaker terminals creating this massive tidal standing wave with very strong eddy currents (because I wasn't using the correct banana plugs), which tried to feed back down the component cables...
    Luckily I had those on the wrong way too so the electrons were stuck.
    I tried to get them to bugger off down the mains cable but that had a mobius loop in it so they ended up back where they started.
    Then my amp blew up which took out half the street....
     
  8. goliath23

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    Well, that makes sense...
    Sometimes it takes an electrical engineer to explain that electrical stuff in a coherent way.

    Is that what you are, Brogan, an electrical engineer?

    :laugh: :clap: :rotfl:
     
  9. Andrew_B

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    If anyone else has accidentally installed directional cables with the arrows pointing the wrong way, they could try lifting up the 'input' end so that it is higher than the 'output'. This will mean that all the electrons are running downhill in the right direction so they can overcome the extreme forces trying to make them run in the opposite direction.
     
  10. Brogan

    Brogan
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    Doh!
    Why didn't I think of that...:D

    P.S. goliath23 - no, i'm not an electrical engineer...just a hardened cynic ;)
     
  11. goliath23

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    I AM an electrical engineer... and just trying to be cynical as well.:D
     
  12. Brogan

    Brogan
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    What?
    You mean you don't believe what I posted?
    Now I am offended...;)
     
  13. Darren Blake

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    Seriously, though.

    Would a "directional" cable mean it was overall screened?

    I bought some screened video coax for one of my connections and was told to wire up the centre core and outer braid to the phono centre terminal and outer as normal, then wire up the "overall" screen to the outer terminal on one end only. This end was the end that went into the signal source.

    Sounds feasible?

    (BTW. made the cable then binned it. It was too bloody inflexible. Remade it with super-floppy normal 75 ohm coax and didn't notice any change in PQ).
     
  14. StooMonster

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    "Directional" cable means:
    1. the cable is sheilded
    2. the sheild in only connected to earth at one end, the signal/source end[/list=1]
      Theory is that this drains EMI/RFI away from targets devices back towards earth through the sheild and not through signal earth.

      Does this really make a difference? If you suffer from a lot of EMi/RFI it might.

      StooMonster
     
  15. Brogan

    Brogan
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    Ah, but what about directional speaker and sub woofer co-ax cables...?
     
  16. dts_boy

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    its the arrows that make it sound/look better. just draw them on with a pen and there you have it - instant upgrade. i can do you a deal on these upgrade pens, maybe i should look into a powerbuy?:devil:
     
  17. Brogan

    Brogan
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    ROFL :rotfl:
    Nice one. :smashin:
     
  18. StooMonster

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    Don't understand your question Brogan, all coax cables are shielded and the earth connection for the shield is at one end only, hence "direction". Are you saying coax cable aren't sheilded? :eek: Or you don't understand the soldering at one end bit? ;)

    Speaker cable? Hrm... unless the said "directional" speaker cable has shielding to drain -- not they it may or may not make any difference -- there may be a bit of snake-oil involved. ;)

    Directional in speaker cables tend to mean direction of twists, both of cores and wires, and some claim the signal is cleaner in one direction because it reduces "skin effect". "Skin effect" is apparently the higher frequencies arriving before lower ones in long cable lengths of analogue cable; the reasoning is stated that when an analogue signal travels through a cable the lower frequencies gravitate towards the centre and the higher frequencies towards the outer part -- hence traveling the skin of the wires. Not being an electronic engineer I have no idea if this is marketing snake oil or truism of physics. Does this make a difference? I have no idea.

    StooMonster
     
  19. Brogan

    Brogan
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    I was referring to speaker (and sub woofer) cables which have the directional arrows on them - as you have so succintly explained above (or below as I'm typing this).

    I have some Cable Talk bi-wire "directional" cable which consists of copper strands which are not twisted at all - they are just plain old boring straight strands from one end to the other.
    How on earth the manufacturer expects me to believe that the electrons could possible behave differently depending on which end is connected to the speaker terminals of the amp is beyond me...

    Oh and before you ask, it was half price...:D

    And I bought it when I was young and easily influenced...;)

    Perhaps we should start using waveguide for speaker connections? There is no cable involved at all - just air and a funny shaped rectangular pipe...
     
  20. StooMonster

    StooMonster
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    Aren't all sub-woofer cables coax though? (and thus shielded).

    The copper cores are made of lots of little copper wires twisted though aren't they? Unless they are solid core cables! :devil: Trying... best... to... think... how... directional... er... did you ask at the time?

    StooMonster
     
  21. Brogan

    Brogan
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    Yes all co-ax cables are shielded but unless they have constructed each terminator differently there will be no difference whichever way it's conected.
    And no, I'm not going to open it up to check...:D

    As for the speaker cable, there are about 50 or so strands in each pvc sheath.
    These strands aren't twisted around each other - they're all running parallel to each other.
    Perhaps it's something to do with the way the copper's been extruded?
    Maybe they do it inside a big magnet so it comes out with all the little atoms aligned....:rotfl:
     
  22. ancientgeek

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    I have directional speaker cables which I made myself. The bass cable is heavy grade co-ax. It is directional because a small capacitor at the speaker end prevents the cable acting as an aerial, theoretically maybe acting like a crystal set and making tiny tiny sounds in the quiet bits.

    I have no idea if the capacitor makes any difference in practice, but it only cost about tuppence and it must make the cables worth several hundred quid a pair what with being directional, biwired and thick.
     

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