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What makes a good Sub cable?

Discussion in 'Subwoofers' started by lscolman, May 21, 2005.

  1. lscolman

    lscolman
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    Hi,

    Can anyone advise whether Sub cables are different to standard interconnects? Is there something in the manufacturing process that makes them better suited to low frequency signals?

    I have a very nice QED silver spiral cable I would like to use with my sub, but I'd like to know if this is a compromise compared to dedicated sub cables?

    I would appreciate the views of other members ?

    Cheers, Lee
     
  2. Hairy Herman

    Hairy Herman
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    i think the main thing is that they are well screened, because they often involve long runs, and also normal interference is around the level at which subs work (eg 50hz mains)
     
  3. bob1

    bob1
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    I made my own sub cable as i wanted an eight meter one ,the cable itself as a very thick screen ,i compared it to a purpose built one and couldn't tell any difference( sound wise), the screening on the manufactured one was cr@p.I'm shure its more than just screening that makes a good sub cable or you could just go for the one with the best screening.
     
  4. eviljohn2

    eviljohn2
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    There's nothing to make an interconnect particularly suited to low frequencies, you just need to follow the usual interconnect engineering rules:
    * Mylar & braid "shield"
    * Enough conductor CSA
    * Good quality terminations

    To be honest, most cable is fairly similar so make sure that any cable you buy has good quality termination plugs and seems well connected to the wire. This is where DIY has a distinct advantage as you are implementing your own quality standards. :)
     
  5. alexs2

    alexs2
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    Totally agree with eviljohn2......I've never used so called dedicated sub cables,and rely on ordinary leads(Kimber or Nordost here,but the same applies to any other decent cable)and as long as you pay attention to the usual rules of not running low level cables alongside mains cables etc,you should have no problems.
     
  6. Crustyloafer

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    It also usually helps if it is a constant 75 ohm impedance too.
     
  7. eviljohn2

    eviljohn2
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    Why's that? The CI is only really important for much higher frequencies than the audio range (particularly the low audio range). Also, audio interconnects are generally set for a 50ohm impedence rather than the 75ohms of digital and video RCA interconnects. :)
     
  8. Crustyloafer

    Crustyloafer
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    I don't know why, but most of the decent sub cables I have had are 75 ohms.
     
  9. eviljohn2

    eviljohn2
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    That's fair enough, but I would suggest that it wasn't the characteristic impedence that made it a good cable but simply that it was well made as I described earlier. If they had RCA connectors then there's very little chance of the entire lead having a 75R impedence anyway since RCA connectors are usually nowhere near 75R and were never designed to be. :)
     
  10. bob1

    bob1
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    I would have thought that most coaxial cables are 75ohms ,most 50ohm cables are made for for transmiting rf to match the ouput of the transmitter.I wouldn't have thought that either would have little effect on the audio range.
     
  11. bass007

    bass007
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    Iscolman, I have a STORM V and I just got a Nordost Bassline Sub Cable well I so amazed that it made such a huge difference, it now sounds much cleaner most of all tighter & faster and I have noticed I can listen more comfortably at higher volumes, and even my other turns it up now in the past all I could turn it down!!
     
  12. Mr Cat

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