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RE: OT: Optical and coaxial digital outputs for PCM, Dolby Digital, DTS and MPEG


  • To: <ukha_d@xxxxxxx>
  • Subject: RE: OT: Optical and coaxial digital outputs for PCM, Dolby Digital, DTS and MPEG
  • From: "James Hoye" <james.hoye@xxxxxxx>
  • Date: Fri, 14 Dec 2001 09:08:57 -0000
  • Delivered-to: mailing list ukha_d@xxxxxxx
  • Mailing-list: list ukha_d@xxxxxxx; contact ukha_d-owner@xxxxxxx
  • Reply-to: ukha_d@xxxxxxx

Both units are JVC and have both the optical and 'phono' type coaxial connections on the back.  The amp/controller can be configured to accept either or, as far as I know my sky box doesn't support this (I know sky are trialing some DD at the moment, but my box only has stereo out 'phono' style sockets that I presume wont have the correct encoded bits), it's the pace unit.  So what would be my best option to use for the DVD player - optical or coax, and where night one get the correct cable/s -would I be correct in assuming that an ordinary unshielded wired one will be 'bad'.
 
A piece of 75 ohm coax should be OK for carrying the bitstream.  Try it and see - you can always borrow more expensive interconnects from a decent hifi shop and see if you can hear any difference.
 
There is some thought that the electrical->optical->electrical conversion introduces noise/jitter/etc - so the coax solution is deemed better.  From my point of view, a piece of 75 ohm coax is easier and cheaper to source (I've got loads spare in the shed!) than an optical TOS-link cable.  Of course, the optical link will provide far better immunity to electrical interference - a bit like KAT5 ;) if you have a 'noisy' environment.  I may in due course try some different coax interconnects - but for now it works OK for me, and I have more pressing things to attend.
 
As usual, you pays your money and you takes your choice - if YOU can't hear any difference, then it's not usually worth paying more money for.
 
James H

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