Question about Cables

Discussion in 'Beginners, General Questions' started by Chun Lam, Feb 6, 2004.

  1. Chun Lam

    Chun Lam Agent

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    Pardon my ignorance, but what's the difference between a digital coax cable and a single plug RCA cable? The connectors look the same. Are they interchangable and if so, are they any consequences if using one for the other?

    What about the LFE subwoofer cable? They look like a single RCA cable too. Any difference?

    What I'm trying to understand is if there are actual differences in the cables and hence, the price differences, or if it's just a marketing thing.


    Thanks!
     
  2. Jeff Gatie

    Jeff Gatie Lead Actor

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    The specifications for spdif (digital coax) require a 75ohm video cable, which is a 75ohm cable with RCA connectors on each end. Make sure it is a video cable (some audio cables are not 75ohms) and you should be OK. Subwoofer cables are just RCA terminated coax audio cables, so you are correct about those. Whether you buy into the "high-end" cables and/or want to pay for them is up to you, but these are the basic requirements.

    IMHO, aside from quality of construction, it is a lot of marketing hype (especially when a coax cable is sold as "Digital"). YMMV!
     
  3. ChrisWiggles

    ChrisWiggles Producer

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    As stated, digital audio needs a 75ohm cable.

    Make sure that if you buy an analog audio interconnect, make sure it is expressely labeled 75ohm, as they need not be, and could be something else.

    Or buy something labeled a "digital audio interconnect" as that should be 75ohm.

    All video cables likewise should be 75ohm, so you can use a video cable if you'd like as well.

    You can go any of these routes, I tend to find the "digital audio cables" tend to be pricier, you can just grab a composite video cable, this tends to be pretty cheap for what is essentially the same thing.
     
  4. Chun Lam

    Chun Lam Agent

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    Thanks!
     
  5. Drew_W

    Drew_W Screenwriter

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    The SPDIF specification was written with a video cable in mind, so a digital coax and a composite video cable are essentially interchangeable.

    The subwoofer cable is the least important of the cables, and you can basically use anything (a long rca cable, or you can buy coax cable and use f-pin to rca converters if you need a long length).
     
  6. WallyBal

    WallyBal Extra

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    Wow Interesting
     

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