How long can a Coax cable be ?

Discussion in 'AV Receivers' started by Mark-C, Jun 10, 2003.

  1. Mark-C

    Mark-C Stunt Coordinator

    Joined:
    Oct 6, 2000
    Messages:
    140
    Likes Received:
    0
    Trophy Points:
    0
    What is classed as to long for a Coax cable from player to receiver ?

    I ask because to get a decent picture from my projector i've had to move my player nearer to it, meaning further from my amp.

    Thanks.
     
  2. Jonathan M

    Jonathan M Second Unit

    Joined:
    Jul 23, 2002
    Messages:
    267
    Likes Received:
    0
    Trophy Points:
    0
    Anything under 100m or so will be fine - it just has to send a digital signal, and the attenuation will be very little. With the frequencies we are talking about (4MHz or so), the wire acts as a transmission line, and the interface between the RCA connectors will cause more of an impedance problem (RCAs are NOT 75 ohm by design) than the length of the cable will (Cable impedance at these frequencies is independent of length).

    You should be fine with whatever you use. I'd definitely use Coax over optical for anything over 6m or so (Optical runs out of signal at around 10m through the plastic optics that most use).

    Hope this helps!
     
  3. Guy Usher

    Guy Usher Supporting Actor

    Joined:
    Oct 20, 2002
    Messages:
    780
    Likes Received:
    0
    Trophy Points:
    0
    Twice as long as from the center to the end. . . Sorry I couldnt resist. . .
     
  4. Craig Woodhall

    Craig Woodhall Supporting Actor

    Joined:
    Jul 11, 1999
    Messages:
    590
    Likes Received:
    0
    Trophy Points:
    0
    i run mine about 75ft using it from my digital out of my soundcard to my Lexicon and there aren't any problems at all.

    Craig
     

Share This Page