Digital Audio Output from LCD tv help

Discussion in 'A/V Interconnects, Cables & Power Conditioning' started by pjoseph, Aug 28, 2011.

  1. pjoseph Full Audioholic

    pjoseph
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    I noticed on the back of my tv there is a "digital audio out" the connection looks like what you would connect a rca cable to but it only has one.

    I also noticed my receiver has a "digital audio in" and only one just like the tv.

    These are not the optical ones either.

    what kind of cable connects to these? It looks like rca but I would think you would only get 1ch or mono output? but not sure


    thanks
  2. its phillip Audioholic Ninja

    its phillip
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    that would be a digital coaxial cable

    it can carry compressed surround like dolby digital/dts or 2 channel pcm
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  3. Adam Audioholic Jedi

    Adam
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    To add to Phillip's info, you don't need to buy a special cable for that connection. A regular RCA cable will work. You can always buy a "digital coax" cable (such as this nice $4 one from Monoprice), but if you have an RCA cable around the house, you can get it hooked up right away.
    Adam,
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  4. TLS Guy Audioholic Overlord

    TLS Guy
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    A digital RCA cable is 75 ohm termination, audio cables are 50 ohm. The 50 ohm cable works, but reflections and cancellations of data during transmission are much higher with the wrong cable. So using a 75 ohm cables with digital interconnections is much preferred.
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  5. pjoseph Full Audioholic

    pjoseph
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    Thannks guys appreciate it,

    TLS: Would the cable that Adam posted above be what you would call preffered?

    thanks again
  6. its phillip Audioholic Ninja

    its phillip
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    Yes, that is a 75ohm cable and would work just fine.
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  7. BoredSysAdmin Audioholic Warlord

    BoredSysAdmin
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    Yes, shielded 75ohm cable is what you need and monoprice is the place to get all sorts of cables you need.
    One thing to add is that most TV's digital out sends out only digital stereo, thou the interface itself is capable of 5.1 audio in Dolbly Digital/DTS
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  8. TLS Guy Audioholic Overlord

    TLS Guy
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    That one will be just dandy.
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  9. markw Audioholic Overlord

    markw
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    Let's not spread Audio Nervosa, shall we?

    Not necessarially. Audio interconnects can be anywhere between 50 and 110 ohms, and sometimes higher, and has been so since the 60's and probably before.

    Nowadays, with manufacturing for all cables being done in one plant, it would not make sense for them to use different cables for audio and video, particularly when 75 ohms works just fine for either. All they need do is put on different color ends.

    Bandwidth may be a different issue for long digital runs but, for the short distances involved in home connections, it's a moot point.
    Last edited: Aug 29, 2011
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